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GeoSeismic Labs Reports: Early Edition

All information reported here is based upon data collection and analysis using procedures that are considered "experimental" and might be of a shocking nature to some individuals. Read and use at your own risk!

SAN JACINTO FAULT ALERT: Wrightwood to Anza, CA





Mount St. Helens Volcano Eruption Update:

U.S. Geological Survey, Vancouver, Washington
University of Washington, Pacific Northwest Seismograph Network, Seattle, Washington

Mount St. Helens Volcano, February 28, 2005 9:50 a.m. PST (1750 UTC)

Current status is Volcano Advisory (Alert Level 2); aviation color code ORANGE


The Latest Eruption Update for the Unrest at Mt. Saint Helens, WA

Definition of Alert Levels

Mount St. Helens Satellite Imagery

For additional information, background, images, and other graphics, please visit:

Pacific Northwest Seismic Network

Caution: You may need to refresh the displayed page in order to view the latest live Volcano-Webcam.

Graphic: Mt. Saint Helens Webcam
Graphic: Popocatepetl Volcano  Webcam


Links to Phenomena Associated with Earthquakes Worldwide

Icelandic water making waves in seismology

Earthquakes—Rattling the Earth’s Plumbing System

Earthquake Lights: Kobe Earthquake in Japan 1995

Recent Infrasonics Associated with Deep
Crustal Resonant Frequency Activity along
the Pacific and North American Plate Boundary

Graphic:(AE)Infrasonic Spectrogram


The Great Sumatra Earthquake and Tsunami
December 26, 2004

Mega-Quake Map
Rupture Area Map
Sumatra Earthquake Global Displacement Wavefield
Graphic: Tsunami's Global Map

Mw 8.9 earthquake in Sumatra on December 26th, 2004 at 00:58 UTC

The Great Earthquake and Tsunami of 26 December 2004 in Southeast Asia

Preliminary report of numerical computation of tsunamis
generated by the December 26, 2004
Off Sumatra Island Earthquake, Indonesia


India’s last active volcano erupts in Andaman Islands

Info about Barren 1 Active Volcano in Andaman Islands, India

Volcanic Cone Collapses and Tsunamis

  • An unstable volcano is a potential source for a Tsunami.

  • Weakened and fractured material may give way and cause a collapse.

  • The most common cause is intrusion of magma, which causes a detachment.

  • Injection of magma into the interior of the volcano causes the volcanic cones to inflate, and the magma pushes out part of the volcano. Magma filling steep faults and fractures can provide a lubricated surface along which collapse may take place. The pore pressure within a volcano may increase owing to the presence of intruding magma, the volcano being squeezed by geological (tectonic) stresses; extra water within the volcano caused by increased rainfall, or a change in the local drainage system.

  • Earthquakes that "shake" the volcano.

  • Weakening of the volcano caused by heat and hot fluids in the interior of the volcano that alter hard volcanic rocks into soft clay.

  • Slippage along the surface on which the volcano is built, caused by a low-angle fault or lubricants such as clays or injected magma.

  • The volcano becomes too steep and high, regular volcanic eruptions ple more and more volcanic materials onto the upper slopes of the volcano which then is susceptible to collapse through gravity.


  • Historical Cone Collapses in the Southwest Pacific

    Ritter (PNG) 1888. Major cone collapse without signs of volcanic eruptions
    led to the formation of a Tsunami 12 to 15 meters high on nearby islands. An early missionary
    map shows the positions of villages in western New Britain that no longer exist. Several
    hundred people were probably killed.

    Ambae (Vanuatu) 1913. A lateral collapse after a large earthquake generated a landslide that
    Caused possibly about 50 deaths.

    White Island (New Zealand) 1914. This volcano located 48 kilometers offshore from the
    North Island has a horse-shoe shaped crater just above sea-level. Part of the crater rim
    collapsed along a fault on or about September 10th and fell to the crater floor. There were 11
    fatalities. No Tsunamis were reported.

    Ruapehu (New Zealand) 1953. The upper portion of Ruapehu's crater wall failed on Christmas
    Eve releasing more than 1 million cubic meters of Crater Lake waters. The collapse was
    relatively small but resulted in a devastating lahar that swept away a railway bridge as the
    main Wellington-Auckland express train was crossing and 151 lives were lost in what has
    become known as the Tangwai Disaster.

    Tinakula (Solomon Islands) 1966. A landslide of unknown cause slipped into the sea from
    the high wall of an ancient avalance amphitheater. There may have been a Tsunami but no
    lives were lost.

    Lopevi (Vanuatu) 1975. A landslide associated with a lava flow from the summit crater
    plunged into the sea. No Tsunami was recorded but the residents have now been permanently evacuated.

    - Australian Geological Survey, Geological Survey of Papua New Guinea

    Mt. Ruapehu-Crater-Lake (Fact Sheet)

    Early Warnings When the Volcano Starts to Slip

    Cumbre Vieja Volcano - Potential Collapse and Tsunami at La Palma, Canary Islands



    Eastern California Shear Zone
    CA/NV Border/Eastern Sierras/Yellowstone
    Tectonic and Volcanic Activity

    How Volcanoes Work

    Yellowstone Swarm Report: 2004

    Volcanoes of Canada

    The Long Valley Caldera: White Mountains Region

    Living With a Restless Caldera:Long Valley, California

    Future Eruptions in California's Long Valley Area--What's Likely

    Adobe Hills Volcanic Field

    Summary of Holocene eruptive activity and probable greatest hazards from future eruptions at volcanic centers in California

    Eruptions from the Inyo chain about 600 Years ago: sequence of events and effects in the Long Valley Area

    Long Valley Tilt Meters

    Photo Gallery of the Long Valley area, California

    ERS radar interferometry reveals strain transient in the Eastern California Shear Zone

    Lithospheric Dynamics and Continental Deformation

    USGS California Tiled 2 Degree Maps

    USGS California Quarternary Fault and Fold Database Maps

    Graphic: Map of Nevada Volcanoes Graphic: Map of Volcanic Hazard Zones for California Graphic: General Location Map of the Long Valley area, California

    Time-Dependent Viscoelastic Stress Transfer and Earthquake Triggering

    Inferring Viscous Properties of the Lithosphere

    Potential Sources for Earthquakes in Northern California

    Pulling the Rug Out from Under California

    Giant Earthquakes Beneath Canada's West Coast

    The role of stress transfer in earthquake occurrence

    The San Andreas Fault System: General Information, Data, Maps, Charts and Graphics


    Volcanoes and the San Andreas Fault

    The San Andreas Fault system through the Transverse Ranges as illuminated by earthquakes


    Graphic: Map of the San Andreas Fault, California Graphic: Diagonal Map of the San Andreas Fault, So. California

    San Jacinto Fault Zone Advisory
    GeoSeismic Labs of California




    (Click here to view MT ULF REPORTS published in October 2004)



    (Click here to view MT ULF REPORTS published in November 2004)



    (Click here to view MT ULF REPORTS published in December 2004)



    (Click here to view MT ULF REPORTS published in January 2005)



    (Click here to view the latest previously published MT ULF REPORT



    MT ULF UPDATE: February 1, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was a strong infrasonic resonant harmonic which was detected at 1.76 Hz (-73.76 dBv)on Tuesday. for Northern California (40.0N). The ULF and MT activity level was moderate during the past 24 hours. The inferred mean average unclamping level was slightly higher. Also, there were no observed unclamping incidents. The ULF mean average is still shifting towards the negative side. No multiple harmonics were observed. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    The most recently detected ULF Signal Burst activity appears to be associated with micro quakes epicentered mainly near Ocotillo Wells, and in Northern Baja, California, Mexico. Also, there was a short duration high amplitude ULF pulsation which appears to be associated in timing with a micro quake epicentered near Junction, UT (Wasatch Front).

    February 01 11:00 h (17:00 GMT):
    In the last 24 hours, the system of monitoreo of Popocatépetl volcano 
    registered 21 exhalations of low intensity accompanied by steam, gas 
    and some of them with small amounts of ash. The most important one 
    ocurred today, at 09:43h.
    


    Popocatépetl volcano-cam 15:46 UTC


     01-FEB-2005 15:00 - 18:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


    MT ULF UPDATE: February 2, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There were no infrasonic resonant harmonics detected below 2.0 Hz on Wednesday. The ULF and MT activity level was moderate during the past 24 hours. The inferred mean average unclamping level was slightly higher. Also, there were no observed unclamping incidents. The ULF mean average is still shifting towards the negative side. No strong multiple harmonics were observed and there was a period with weak multiple harmonics that are visible within the latest spectrogram prior to a small earthquake epicentered on a branch off the Northern San Jacinto fault zone near Lytle Creek and Devore, CA. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M4.1 2005/02/02 13:17:39 UT 31.939N 116.223W d:6.9 km ( 24 mi) ENE of Ensenada, Mexico
    M3.2 2005/02/03 04:52:21 UT 34.158N 117.426W d:10.3 km ( 4 mi) NW of Rialto, CA

    The most recently detected ULF activity appears to be associated with a micro quake epicentered near Big Bear Lake, CA and moderate seismic activity in Northern Baja, CAlifornia, Mexico. Also, there was a short duration high amplitude ULF pulsation which was associated with a micro quake epicentered North of Big Bear Lake (Helendale Fault). There will be a new Moon and resultant high spring tides along the West Coast on February 8, 2005.


     02-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


    MT ULF UPDATE: February 3, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was a period with infrasonic resonant harmonics detected at 0.63 Hz (-78.48 dBv) on Thursday. The ULF and MT activity level was moderate during the past 24 hours. The inferred mean average unclamping level was slightly lowered. Also, there were no observed unclamping incidents. The ULF mean average is still shifting towards the negative side. Several low amplitude sharp upper level harmonic bursts were observed along with a period of weak multiple harmonics associated with seismic activity epicentered near Wrightwood, and Fontana, CA. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M3.2 2005/02/03 18:12:55 UT 35.693N 121.151W d:6.7 km ( 4 mi) NNE of San Simeon, CA

    The most recently detected ULF activity appears to be associated with a micro quake epicentered near San Simeon, Templeton and Porterville, CA. There will be a new Moon and resultant high spring tides along the West Coast on February 8, 2005. Also, there is a chance for a strong geomagnetic disturbance which would be simultaneous if an expected increase in solar activity becomes geo-effective.


     03-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


    MT ULF UPDATE: February 4, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was a period with infrasonic resonant harmonics detected at 2.66 Hz (-76.85 dBv) on Friday. The ULF and MT activity level was moderate during the past 24 hours. The inferred mean average unclamping level was slightly higher. Also, there were no observed unclamping incidents. The ULF mean average is still shifting towards the negative side. Another several low amplitude sharp upper level harmonic bursts were observed that were associated with seismic activity epicentered near Big Bear, Cabazon, and Fontana, CA. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M3.1 2005/02/04 23:27:40 UT 38.867N 123.604W d:0.1 9 km ( 6 mi) ESE of Point Arena, CA
    M3.0 2005/02/04 10:00:53 UT 31.739N 116.006W d:6.0 44 km ( 28 mi) NW of Lázaro Cárdenas, Mexico

    The most recently detected ULF activity appears to be associated with a micro quakes epicentered in Northern Baja, Twentynine Palms, and Fontana, CA. There will be a new Moon and resultant high spring tides along the West Coast on February 8, 2005. Also, there is a chance for a strong geomagnetic disturbance which would be simultaneous if an expected increase in solar activity becomes geo-effective and now appears to be approaching the visible side of the Sun.


     04-FEB-2005 18:00 - 21:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


    MT ULF UPDATE: February 5, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was a period with infrasonic resonant harmonics detected at 2.28 Hz (-76.70 dBv) on Saturday. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was unchanged. Also, there were no observed unclamping incidents. The ULF mean average is still shifting towards the negative side of the chart. Another several low amplitude sharp upper level harmonic bursts were observed that were associated with seismic activity epicentered along the plate boundary in Southern California. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M4.4 2005/02/05 18:43:30 UT 37.395N 121.487W d:7.0 km ( 19 mi) E of Alum Rock, CA

    The most recently detected ULF activity appears to be associated with a micro quakes epicentered in Fontana, Anza, and Obsidian Butte, CA. There will be a new Moon and resultant high spring tides along the West Coast on February 8, 2005. Also, there is a chance for a strong geomagnetic disturbance which would be simultaneous if an expected increase in solar activity becomes geo-effective and now appears to be approaching the visible side of the Sun.


     05-FEB-2005 18:00 - 21:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


    MT ULF UPDATE: February 6, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There were no detected infrasonic resonant harmonics below 2 Hz on Sunday. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was unchanged. Also, there were no observed unclamping incidents. The ULF mean average was unchanged. A few more low amplitude sharp upper level harmonic bursts were observed that were associated with seismic activity epicentered along the plate boundary in Southern California near Big Bear Lake, and in Baja. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M4.0 2005/02/06 08:46:12 UT 27.677N 111.983W d:10.0 km ( 31 mi) NE of Santa Rosalía, Mexico

    The most recently detected ULF activity appears to be associated with a micro quake epicentered along the border near Mexicali/Calexico, CA. Also, shortly after that a light earthquake was epicentered along the Plate boundary in Central Baja and the Gulf of California. There will be a new Moon and resultant high spring tides along the West Coast on February 8, 2005.


     06-FEB-2005 15:00 - 18:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


    MT ULF UPDATE: February 7, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was a period with a peak infrasonic resonant harmonic detected at 1.83 Hz (-74.72 dBv) on Monday. The ULF and MT activity level was moderate during the past 24 hours. The inferred mean average unclamping level was unchanged. Also, there were no observed unclamping incidents. The ULF mean average was increasing (positive). several more low amplitude sharp upper level harmonic bursts were observed that were associated with micro seismicity epicentered along the plate boundary in Southern California and especially from the San Jacinto fault (Fontana, CA). There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    The most recently detected high amplitude ULF signal burst appears to be associated with a micro quake epicentered along the San Jacinto fault zone near Moreno Valley, CA. There will be a new Moon and resultant high spring tides along the West Coast on February 8, 2005.


    07-FEB-2005 18:00 - 21:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.0  2005/02/07 20:52:22  36.091 -117.886   4.9    8 km (  5 mi) NE  of Coso Junction, CA
    M2.0  2005/02/07 20:50:46  32.566 -116.773   0.0   13 km (  8 mi) W   of Tecate, Mexico
    M1.0  2005/02/07 20:08:31  33.382 -116.379  13.4   15 km (  9 mi) N   of Borrego Springs, CA
    M1.7  2005/02/07 19:25:17  32.904 -116.221   6.8   28 km ( 17 mi) NW  of Ocotillo, CA
    

    MT ULF UPDATE: February 8, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was a period with a peak infrasonic resonant harmonic detected at 0.518 Hz (-77.63 dBv) on Tuesday. The ULF and MT activity level was moderate during the past 24 hours. The inferred mean average unclamping level was unchanged. Also, there were no observed unclamping incidents. The ULF mean average was increasing (positive). several more low amplitude sharp upper level harmonic bursts were observed that were associated with micro seismicity epicentered along the plate boundary in Southern California. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M3.0 2005/02/08 17:35:32 UT 35.115N 116.998W d:4.3 km ( 17 mi) N of Barstow, CA
    M3.5 2005/02/08 22:00:48 UT 35.952N 120.506W d:9.7 km ( 5 mi) NW of Parkfield, CA

    The most recently detected high amplitude ULF signal burst appears to be associated with a small earthquake epicentered near Barstow, CA. Other areas with observed ULF activity included Loma Linda, Fontana, CA and Northern Baja, CA Mexico. The offshore lunar-tidal loading effect apparently affected the Central San Andreas Fault, about 35 miles east of San Simeon and 30 minutes prior to the New Moon. It occurred during a period with maximum tidal loading (phase angle) transition between the highest tide to the lowest tide. A similar occurrence in tidal loading was observed for the December 22, 2003 Mw 6.5 San Simeon earthquake. On Wednesday, there will be another period with high and low spring tides between 17:59 UTC and 00:56 UTC on February 10, 2005.

    Spring Tides: San Simeon Mw 6.5 Earthquake

    San Simeon, California
    7 February 2005 - 10 February 2005
    35.6417° N, 121.1883° W
    
    2005-02-07  14:59 UTC   Sunrise
    2005-02-07  16:25 UTC   6.69 feet  High Tide
    2005-02-07  23:40 UTC  -1.77 feet  Low Tide
    2005-02-08  01:38 UTC   Sunset
    2005-02-08  06:07 UTC   4.15 feet  High Tide
    2005-02-08  11:03 UTC   1.53 feet  Low Tide
    2005-02-08  14:58 UTC   Sunrise
    2005-02-08  17:12 UTC   6.79 feet  High Tide
    
    2005-02-08  17:35 UTC   M3.0 35.115N 116.998W   
    	depth:4.3 km ( 17 mi) N   of Barstow, CA
    	5 mi. ESE of the Calico-Blackwater Fault
    	

    Birth of a New Fault: Calico-Blackwater

    Transient Strain Accumulation and Fault Interaction in the ECSZ


    2005-02-08 22:00 UTC M3.5 35.952N 120.506W depth:9.7 km ( 5 mi) NW of Parkfield, CA Central San Andreas Fault Zone 2005-02-08 22:30 UTC New Moon 2005-02-09 00:19 UTC -1.74 feet Low Tide 2005-02-09 01:39 UTC Sunset 2005-02-09 06:41 UTC 4.41 feet High Tide 2005-02-09 11:52 UTC 1.21 feet Low Tide 2005-02-09 14:57 UTC Sunrise 2005-02-09 17:59 UTC 6.61 feet High Tide 2005-02-10 00:56 UTC -1.48 feet Low Tide 2005-02-10 01:40 UTC Sunset


    08-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.4  2005/02/08 15:00:35  34.152 -117.439  10.1    6 km (  4 mi) NNE of Fontana, CA
    1 mi. S   of the Sierra Madre Fault Zone:

    M2.2 2005/02/08 14:12:30 34.037 -117.268 15.9 2 km ( 1 mi) SW of Loma Linda, CA 0 mi. WSW of the San Jacinto Fault Zone:

    M1.3 2005/02/08 12:33:05 33.500 -116.769 8.3 11 km ( 7 mi) SW of Anza, CA 8 mi. SW of the San Jacinto Fault Zone:

    M1.6 2005/02/08 12:23:01 34.022 -116.746 13.7 11 km ( 7 mi) SE of Mt. San Gorgonio, CA 1 mi. S of the San Andreas Fault:

    MT ULF UPDATE: February 9, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There were no observed infrasonic harmonics beleow 2 Hz on Wednesday. The ULF and MT activity level was moderate during the past 24 hours. The inferred mean average unclamping level was slightly lower. Also, there were no observed unclamping incidents. The ULF mean average was decreasing (negative). several more low amplitude sharp upper level harmonic bursts were observed that were associated with micro seismicity epicentered along the plate boundary in Southern California. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    The most recently detected ULF signal burst appears to be associated with a micro quake epicentered near Coso Junction and Ridgecrest, CA. Other areas with observed ULF activity included Big Bear Lake and Anza, CA.


    09-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.0  2005/02/09 13:24:46  36.097 -117.906   4.3    7 km (  4 mi) NNE of Coso Junction, CA
    

    M1.2 2005/02/09 13:12:23 34.718 -116.302 6.4 13 km ( 8 mi) W of Ludlow, CA

    M2.5 2005/02/09 12:53:53 32.010 -116.478 6.0 21 km ( 13 mi) NE of Ensenada, Mexico 56 mi. SW of the Elsinore Fault:

    M1.5 2005/02/09 12:40:23 33.875 -116.761 15.5 4 km ( 2 mi) S of Cabazon, CA 4 mi. S of the Banning Fault:

    M1.3 2005/02/09 12:22:18 34.132 -116.686 12.8 13 km ( 8 mi) NW of Morongo Valley, CA 6 mi. N of the San Andreas Fault:
    February 9, 1971: I remember that particular day as if it was yesterday. The rude awakening shortly after dawn was accompanied by a roar that sounded like a freight train crossing through the room. Later, I found out the consequences of the intensity of shaking when the news reported that several people tweleve miles away were killed by the collapse of two hospitials, a freeway overpass, and the near collapse of an earthen dam, which would have caused an untold number of casualties. It was my first earthquake experience, and I was overwhelmed by the amount of physical and emotional damage that mother-nature had wrought upon Southern California on that fateful day. I was immediately interested in getting closer to the epicenter. So, I drove north on the Hollywood Fwy to visit with a friend who lived about five miles south of Sylmar, CA. Almost every light standard post on the freeway was broken as a result of the shaking. That night, I remember observing a Total Lunar Eclipse and silently wondering if there was some kind of a connection with it and the earlier M6.5 earthquake.
    I didn't get to see any of the major destruction until a month later when I visited the site of the Olive-View Hosptial, where several parked ambulances were crushed under a collapsed covered parking facility. I remember seeing up close some of the homes that were destroyed by the San Fernando Earthquake. I also remember feeling a moderate aftershock about two months afterward. That was thirty-four years ago, and it left quite an impression upon me that still exists today.

    Killer Quake: From the LAFD Archives


    MT ULF UPDATE: February 10, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There were no observed infrasonic harmonics beleow 2 Hz on Thursday. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was slightly higher. Also, there were no observed unclamping incidents. The ULF mean average was decreasing (negative). The number of recent low amplitude sharp upper level harmonic bursts being observed decreased during the past 24 hours. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M3.2 2005/02/10 15:01:35 UT 38.792N 122.745W d:4.0 km ( 3 mi) WNW of Anderson Springs, CA

    The most recently detected ULF activity appears to be associated with a micro quake epicentered near Big Bear Lake, Anza, and Borrego Springs, CA.


    10-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.6  2005/02/10 14:50:42  34.292 -116.885   8.2    5 km (  3 mi) NW  of Big Bear City, CA
    4 mi. S   of the Helendale Fault:

    M1.3 2005/02/10 14:21:28 34.646 -116.288 8.1 14 km ( 9 mi) SW of Ludlow, CA

    M1.4 2005/02/10 13:09:37 33.362 -116.361 13.9 13 km ( 8 mi) N of Borrego Springs, CA 1 mi. NE of the San Jacinto Fault Zone:

    MT ULF UPDATE: February 11, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There were two long periods with strong infrasonic harmonics below 2 Hz on Friday. The peak infrasonic resonant harmonic frequency was measured at 1.27 Hz (-71.10 dBv) which is inferred to be for the Northern Mojave Desert Block and Southern Owens Valley/Sierra Nevada Mountains region. The ULF and MT activity level was moderate during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was slightly decreased (negative). There was a period tonight with a low amplitude sharp upper level harmonic burst, which preceded a very strong long duration upper level infrasonic harmonic frequency burst at approximately 5 Hz.

    There were no detected geomagnetic oscillations, however, some short periods with piezomagnetic activity were detected during the past 24 hours. All daily charts were updated to reflect the latest analysis.

    The most recently detected ULF activity appears to be associated with micro quakes epicentered near Holtville (Imperial Fault:(see graph)) and Anza (San Jacinto Fault), CA. Also, the strong infrasonic activity appears to be associated with the San Jacinto fault (Beaumont) and the Helendale fault (Apple Valley) in Southern California. Due to the detected high amplitude infrasonic pulsations, the region of the Helendale fault from east of Big Bear Lake and northwest into the Mojave Desert Block needs to be on advisory for the next 72 hours.


     12-FEB-2005 04:29 - 07:25 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.3  2005/02/11 06:32:57  33.474 -116.517  13.5   17 km ( 11 mi) ESE of Anza, CA
    0 mi. NNW of the San Jacinto Fault Zone:

    M1.1 2005/02/11 04:55:09 35.726 -118.471 5.4 4 km ( 3 mi) WSW of Kernville, CA

    MT ULF UPDATE: February 12, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was a period with strong infrasonic harmonics below 2 Hz on Saturday. The peak infrasonic resonant harmonic frequency was measured at 1.18 Hz (-71.92 dBv) which is inferred to be for the Mojave Desert Block to Transverse Range region. The ULF and MT activity level was low during the past 24 hours. The inferred mean average unclamping level was slightly lower during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was slightly increased (positive). There was another period with a low amplitude sharp upper level harmonic burst. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    The most recently detected ULF activity appears to be associated with a micro quake epicentered near Anza (San Jacinto Fault), CA. Also, the infrasonic activity appears to be associated with the San Jacinto fault zone between Anza, and Borrego Springs, CA. The upper level short duration infrasonic burst was inferred to be from near Calimesa in Southern California. The advisory is extended to now include the Cajon Pass to Coso Junction/Olancha region for the next 48 hours.


     13-FEB-2005 00:00 - 03:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.5  2005/02/13 02:13:48  33.171 -116.434  13.4   10 km (  6 mi) SW  of Borrego Springs, CA
    10 mi. NE  of the Elsinore Fault:

    M1.6 2005/02/13 02:03:53 33.991 -117.036 17.4 5 km ( 3 mi) SSE of Yucaipa, CA 0 mi. NNW of the Banning Fault:

    MT ULF UPDATE: February 13, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was a period with infrasonic harmonics below 2 Hz on Sunday. The peak infrasonic resonant harmonic frequency was measured at 1.59 Hz (-73.11 dBv) which is inferred to be for the Northern California region. The ULF and MT activity level was low during the past 24 hours. The inferred mean average unclamping level was slightly higher during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was unchanged. There were a few more incidents with low amplitude sharp upper level harmonic bursts were associated with the Banning and San Jacinto fault near Cherry Valley and Beaumont, CA. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    The most recently detected ULF activity appears to be associated with a micro quake epicentered near Lake Elsinore, CA.

    February 12 11:00 h (17:00 GMT):
    In the last 24 hours, the monitoring system of Popocatépetl 
    volcano registered 26 exhalations of low intensity accompanied 
    by steam, gas and some of them with small amounts of ash like 
    the one occurred yesterday at 18:19 h (local time) (see image). 
    Also there were registered some short episodes of harmonic 
    tremor of low amplitud. 
    


    Popocatépetl volcano-cam 20:00 UTC


     14-FEB-2005 03:55 - 06:50 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.4  2005/02/14 05:41:03 UTC 36.254N 117.900W  5.6 km (  6 mi) E   of Olancha, CA
    3 mi. E   of the Owens Valley Fault:

    M1.5 2005/02/14 05:14:16 UTC 34.965N 116.654W 11.2 km ( 22 mi) ENE of Barstow, CA 0 mi. E of the West Calico Fault:

    M1.4 2005/02/14 03:55:01 UTC 34.532N 116.242W 7.0 km ( 14 mi) SSW of Ludlow, CA 2 mi. NNE of the Pisgah Fault:

    MT ULF UPDATE: February 14, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was a period with strong infrasonic harmonics between (1.1 and 1.4) Hz on Monday. The peak infrasonic resonant harmonic frequency was measured at 1.32 Hz (-71.76 dBv) which is inferred to be for the Owens Valley-Eastern Sierras region. The ULF and MT activity level was moderate during the past 24 hours. The inferred mean average unclamping level was slightly lower during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was unchanged. There were no detected low amplitude sharp upper level harmonic bursts. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    The most recently detected ULF activity appears to be associated with the Northern Mojave Desert and Coso Junction north to Bishop, CA.

     14-FEB-2005 21:00 - 23:59 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.3  2005/02/14 23:43:43 UTC 37.501N 118.876W   d:7.0 km ( 11 mi) SSE of Mammoth Lakes, CA
    

    M1.3 2005/02/14 23:39:32 UTC 37.503N 118.421W d:9.2 km ( 10 mi) N of Bishop, CA

    M2.0 2005/02/14 22:50:18 UTC 36.018N 117.879W d:6.3 km ( 4 mi) ESE of Coso Junction, CA 4 mi. NE of the Sierra Nevada Fault Zone:

    MT ULF UPDATE: February 15, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was a period with infrasonic harmonic activity below 2 Hz on Tuesday. The peak infrasonic resonant harmonic frequency was measured at 1.93 Hz (-77.1267 dBv) which is inferred to be for the Northern California region. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was increasing (positive). There were no detected low amplitude sharp upper level harmonic bursts. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M3.4 2005/02/15 22:20:51 34.802 -116.260 7.3 13 km ( 8 mi) NW of Ludlow, CA
    M4.2 2005/02/15 22:23:27 31.648 -115.972 3.8 34 km ( 21 mi) NW of Lázaro Cárdenas, Mexico

    The seismic event in the ECSZ Mojave Desert Block appears to be related to a sharp increase in both ULF and Infrasonic Resonant Harmonic Energy (1.18 Hz) as reported earlier this month on February 12, 2005. The seismic event in Baja California, Mexico was also preceded by a sharp increase in ULF activity associated with a micro quake epicentered near the border along the Southern Elsinore/Laguna Salada fault. The three day period with a significant number of 5 Hz spectral harmonic content appears to be related to the high level of crustal stress coming from the ECSZ and now affecting the stress level of several areas within the Mojave Desert Block, including the Garlock, West Calico-Blackwater, Helendale, and Pisgah Faults.

     15-FEB-2005 18:00 - 21:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.3  2005/02/15 18:05:31 UTC 34.010N 116.726W  18.2 km (  7 mi) NNE of Cabazon, CA
    

    M1.3 2005/02/15 18:45:17 UTC 36.117N 117.713W 3.9 km ( 12 mi) SSW of Darwin, CA

    M1.1 2005/02/15 19:42:38 UTC 35.049N 118.325W 2.0 km ( 8 mi) WNW of Mojave, CA

    M1.5 2005/02/15 19:47:08 UTC 34.619N 117.122W 5.6 km ( 9 mi) NE of Apple Valley, CA

    MT ULF UPDATE: February 16, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was no significant infrasonic harmonic activity below 2 Hz on Wednesday. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was slightly lower during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was increasing (positive). There were no detected low amplitude sharp upper level harmonic bursts. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    A number of both ULF and Infrasonic (AE) active events were detected and inferred to be associated with micro quakes epicentered along the San Jacinto fault zone near Fontana, Borrego Springs, and Ocotillo Wells, CA. Also, near Yucca Valley and Landers, CA. The AE event associated with the Borrego Sink (6 Miles E of Borrego Springs) micro quake was the most active and accompanied by a period of strong piezomagnetic disturbance.

    February 16 11:00 h (17:00 GMT):
    In the last 24 hours, the monitoring system of Popocatépetl volcano registered 17 exhalations 
    of low intensity accompanied by steam, gas and some of them with small amounts of ash. The most 
    important one ocurred today, at 8:33h.
    


    Popocatépetl volcano-cam 14:33 UTC


     16-FEB-2005 15:00 - 18:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.2  2005/02/16 16:54:35  33.428 -116.360  15.3   20 km ( 13 mi) N   of Borrego Springs, CA
    

    MT ULF UPDATE: February 17, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was significant infrasonic harmonic activity below 2 Hz on Thursday. The Peak Resonant Infrasonic Harmonic Frequency was measured at 1.64 Hz (-73.26 dBv). The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was unchanged. There were no detected low amplitude sharp upper level harmonic bursts. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M3.2 2005/02/17 09:18:32 37.257 -121.639 6.6 14 km ( 9 mi) N of Morgan Hill, CA

    There was one signficant ULF signal burst inferred to be from north of Yucca Valley at Landers, CA.


    Popocatépetl volcano-cam 14:33 UTC


     17-FEB-2005 18:00 - 21:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


    MT ULF UPDATE: February 18, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was no significant infrasonic harmonic activity below 2 Hz on Friday. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was slightly higher during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was unchanged. There were no detected low amplitude sharp upper level harmonic bursts. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M3.5 2005/02/18 22:08:37 UT 38.385N 118.212W d:10.1 km ( 9 mi) SSW of Luning, NV

    There was a period with ULF burst activity inferred to be from north of Yucca Valley at Landers, CA.


    Popocatépetl volcano-cam 14:33 UTC


     18-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.6  2005/02/18 13:20:14 UTC 34.660N 116.214W   d:7.0 km (  5 mi) SW  of Ludlow, CA
    

    MT ULF UPDATE: February 19, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was strong infrasonic harmonic activity below 2 Hz on Saturday. The Peak (Crustal)Infrasonic Harmonic Resonant Frequency was measured at 0.906 Hz (-69.49 dBv), which is the highest observed amplitude Acoustic Emission since late November, 2004. Also, there were periods with strong Infrasonic activity inferred to be associated with a large swath of Southern and Central California. Areas with strong ULF activity and disturbance were at Qualeys Camp, Tehachapi Mountains, Coso Range Volcanic Field, and from near Banning/Yucaipa, CA. The duration of intense infrasonic activity greatly exceeded that of which I've previously detected and reported upon in the past. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was sharply increased (positive)to a new high point on the chart. There were no detected low amplitude sharp upper level harmonic bursts. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    M3.6 2005/02/19 10:17:20 UTC 38.036N 118.590W d:8.2 km ( 19 mi) S of Qualeys Camp, NV

    There were periods with ULF burst activity inferred to be from near Anza, Banning, and Coso Junction, CA. Also, there were a few more high amplitude short duration ULF pulsations observed during the past 24 hours.

    Latest Solar Flare Activity:

    Joint USAF/NOAA Solar and Geophysical Activity Summary
    SGAS Number 051 Issued at 0245Z on 20 Feb 2005
    This report is compiled from data received at SWO on 19 Feb
    A.  Energetic Events
    Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
     0716 0717 0717                       120                           
     1036 1101 1113  0732        M3.3                                   
    B.  Proton Events:  None
    


     19-FEB-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph


     19-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     19-FEB-2005 15:00 - 18:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     19-FEB-2005 18:00 - 21:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     19-FEB-2005 21:00 - 23:59 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.7  2005/02/19 14:58:45 UTC 34.976N 118.578W  d:11.8 km (  8 mi) SSE of Stallion Springs, CA
    6 mi. NE  of the Garlock Fault Zone
    M1.9 2005/02/19 15:25:56 UTC 37.968N 118.666W d:6.9 km ( 25 mi) SSW of Qualeys Camp, NV Adobe Hills Volcanic Field
    M1.2 2005/02/19 18:04:39 UTC 37.502N 118.350W d:9.5 km ( 10 mi) NNE of Bishop, CA White Mountains Fault Zone
    M2.2 2005/02/19 18:15:19 UTC 33.932N 116.858W d:8.4 km ( 2 mi) E of Banning, CA 1 mi. SSE of the Banning Fault: So. Branch San Andreas Fault
    M1.8 2005/02/19 20:41:34 UTC 34.033N 117.090W d:10.4 km ( 2 mi) W of Yucaipa, CA 3 mi. N of the Banning Fault: So. Branch San Andreas Fault
    M1.4 2005/02/19 23:47:19 UTC 36.020N 117.806W d:3.1 km ( 8 mi) ESE of Coso Junction, CA Coso Volcanic Field (Sugerloaf Pk.)

    MT ULF UPDATE: February 20, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was strong infrasonic harmonic activity below 2 Hz on Sunday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.03 Hz (-70.85 dBv), and inferred to be associated with the Pacific and North American Plate Boundary in Southern California. Areas with strong ULF activity and disturbance were from near Borrego Springs, La Quinta and Truckee, CA. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was slightly increased (positive)to another new highest point on the chart. There were no detected low amplitude sharp upper level harmonic bursts. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    There were high frequency ULF signal bursts inferred to be from near Truckee, CA (West of Lake Tahoe). Also, there were a few more high amplitude short duration ULF pulsations observed during the past 24 hours. One of them appeared to be related to a micro quake epicentered in the Coachella Valley near La Quinta, CA.


     20-FEB-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph


     20-FEB-2005 21:00 - 23:59 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.3  2005/02/20 21:23:52 UTC 33.475N 116.519W  d:16.7 km ( 10 mi) ESE of Anza, CA
    0 mi. SSE of the San Jacinto Fault Zone
    
    M1.5 2005/02/20 23:46:54 UTC 33.406N 116.483W d:14.6 km ( 13 mi) NNW of Borrego Springs, CA 0 mi. WSW of the San Jacinto Fault Zone

    MT ULF UPDATE: February 21, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was strong infrasonic harmonic activity below 2 Hz on Monday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 0.78 Hz (-69.63 dBv), and inferred to be associated with the Pacific and North American Plate Boundary in Southern California, and Baja, California, Mexico. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was lower during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was increased (positive)to another new highest point on the chart. There were a few detected low amplitude sharp upper level harmonic bursts. There were no detected geomagnetic oscillations. All daily charts were updated to reflect the latest analysis.

    At mid-day, there was a major power surge, which caused minor damage to the flux-gate magnetometer along with a temporary outage for infrasonic spectrograms. However, I managed to reset the affected equipment including a digital spectrum analyzer in time to capture the most important infrasonic harmonic peak reading for the period. The flux-gate magnetometer is still off-line, and I hope to have repairs completed within 24 hours.

    There were ULF signal bursts inferred to be from near Gorman, and Borrego Springs, CA.


     21-FEB-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph


     21-FEB-2005 15:00 - 18:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     21-FEB-2005 21:00 - 23:59 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     22-FEB-2005 00:00 - 03:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.1  2005/02/21 16:20:59 UTC 33.244N 116.407W   d:4.7 km (  2 mi) W   of Borrego Springs, CA
    6 mi. SW  of the San Jacinto Fault Zone
    
    M2.6 2005/02/21 20:32:17 UTC 32.315N 115.599W d:6.0 km ( 25 mi) SSW of Mexicali, Mexico Laguna Salada Fault
    M1.8 2005/02/21 21:05:42 UTC 34.697N 118.780W d:10.0 km ( 8 mi) SSE of Gorman, CA 3 mi. NE of the San Gabriel Fault
    M1.4 2005/02/21 21:39:23 UTC 33.792N 116.955W d:13.6 km ( 1 mi) ENE of San Jacinto, CA 0 mi. SSW of the San Jacinto Fault Zone

    MT ULF UPDATE: February 22, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was strong infrasonic harmonic activity below 2 Hz on Tuesday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 0.66 Hz (-68.40 dBv), and inferred to be associated with the Pacific and North American Plate Boundary in Southern California, and Baja, California, Mexico. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was significantly lower during the past 24 hours. Also, there were no observed unclamping incidents. There were a few detected low amplitude sharp upper level infrasonic harmonic bursts, and a long period with a 5 Hz spectral line, which was detected by the active tracking filter. The 5 Hz spectral activity is associated with high crustal stress along the plate boundary and the San Andreas Fault System in Southern California.

    M5.5 2005/02/22 19:15:51 UTC 25.837N 109.889W d:10.0 km ( 45 mi) W of Ahome, Mexico

    Shortly after the last report was published, a vital piece of equipment was suspected of being damaged and required an extended test period, and the ULF and MT derived charts will not be updated for another 24 hours. Tonight, the flux-gate magnetometer was repaired, and is now back in service. Your contributions are essential to help keep the instrumentation in operation 24/7. I'm currently working on a schedule to replace the oldest computer, which should be completed later this month.

    There were ULF signal bursts inferred to be from near Pt. Migu, and Anza, CA. The Anza ULF burst was of the high frequency type and was immediately followed by the M5.5 earthquake epicentered in the Gulf of California indicating a resonant coupling (precursor) between the two separate seismic events. So, that may indicate a very high stress level is embedded along the San Jacinto fault at the Anza Seismic Gap.

    Full Moon
    The Full Moon and resulting Spring Tides will be on February 24, 2005 (04:55 UTC); with a predicted differential of 6.08 feet, and a signficant lunar-tidal phase angle (transition) between 17:23 UTC (02/23/2005) and 00:16 UTC (02/24/2005) along the coast of Central California. Likewise; with a predicted differential of 6.02 feet, and a significant lunar-tidal phase angle (transition) between 16:18 UTC (02/23/2005) and 23:18 UTC (02/23/2005) along the coast of Southern California.


     22-FEB-2005 09:00 - 12:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     22-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     22-FEB-2005 15:00 - 18:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     22-FEB-2005 18:00 - 21:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     22-FEB-2005 21:00 - 23:59 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.8  2005/02/22 11:45:56 UTC 33.440N 116.472W  d:13.5 km ( 14 mi) SE  of Anza, CA
    1 mi. NNE of the San Jacinto Fault Zone
    
    M1.5 2005/02/22 15:59:30 UTC 33.487N 116.557W d:12.6 km ( 8 mi) SE of Anza, CA 1 mi. SSW of the San Jacinto Fault Zone
    M1.9 2005/02/22 18:29:57 UTC 33.700N 116.734W d:18.8 km ( 3 mi) SSW of Idyllwild, CA 0 mi. ESE of the San Jacinto Fault Zone
    M1.7 2005/02/22 19:08:58 UTC 33.582N 116.597W d:15.5 km ( 5 mi) ENE of Anza, CA 1 mi. NNE of the San Jacinto Fault Zone


    22 FEB 2005  ( 53)
    
         ot  = 19:15:51.69   +/-   0.54              GULF OF CALIFORNIA              
         lat =      25.825   +/-    5.9
         lon =    -109.897   +/-    4.5              MAGNITUDE 5.5 (HRV)      
         dep =        10.0  (geophysicist)
    
         95 km (60 miles) W of Los Mochis, Sinaloa, Mexico (pop 200,000)
         145 km (90 miles) SSW of Navojoa, Sonora, Mexico (pop 98,000)
         145 km (90 miles) E of Loreto, Baja California Sur, Mexico (pop 10,000)
         1305 km (810 miles) NW of MEXICO CITY, D.F., Mexico
     
         Felt at Loreto, Baja California Sur; Los Mochis, Sinaloa and
         Ciudad Obregon, Sonora, Mexico.
    

    MT ULF UPDATE: February 23, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was strong infrasonic harmonic activity below 2 Hz on Wednesday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 0.83 Hz (-70.42 dBv), and inferred to be associated with the Pacific and North American Plate Boundary in Southern California, and northern Baja, California, Mexico. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. Also, there were no observed unclamping incidents. There were no detected low amplitude sharp upper level infrasonic harmonic bursts. There were long periods with a detected 5 Hz spectral line, which was detected by the active tracking filter. The 5 Hz spectral activity is associated with high crustal stress along the plate boundary and the San Andreas Fault System in Southern California.

    M3.0 2005/02/23 21:57:44 UTC 40.264N 121.194W d:0.0 km ( 3 mi) NNW of Almanor, CA

    Note: GeoSeismic Labs needs your surplus equipment. Please contact me about this via email. Currently required is a 14 to 15 inch working LCD computer monitor to replace an aging CRT monitor to help save on rising energy costs, and to be in compliance with requirements for using less power during the upcoming peak demand season.

    There was a ULF signal burst inferred to be from near Borrego Springs, CA which was of the high frequency type. So, that may indicate a very high stress level is embedded along the San Jacinto fault at the Borrego Sink.

    February 23 11:00 h (17:00 GMT):
    In the last 24 hours, the system of monitoreo of Popocatépetl volcano registered 46 exhalations 
    of low intensity accompanied by steam, gas and some of them with small amounts of ash. The most 
    important one ocurred today, at 07:30h. (see image).The other monitored parameters remain without 
    important changes. 
    


     23-FEB-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph


     23-FEB-2005 06:00 - 09:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     23-FEB-2005 09:00 - 12:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     23-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     23-FEB-2005 15:00 - 18:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     23-FEB-2005 18:00 - 21:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     23-FEB-2005 21:00 - 23:59 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     24-FEB-2005 00:00 - 03:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    M1.6  2005/02/23 06:15:24 UTC  34.710N 116.360W   D:7.1 km ( 11 mi) W   of Ludlow, CA
    

    ECSZ: Strong (5 to 6Hz) Spectral lines appear to be related to building stress along the existing and inferred developing (new) plate boundary between the Southern Owens Valley, across the Garlock fault zone, and into the Mojave Desert region east of Barstow, CA along a NW right-lateral slip alignment from Little Lake to Calico via a left step over from the Pisgah fault to the West Calico-Blackwater fault.

    M1.3  2005/02/23 08:22:20 UTC  33.727N 116.767W  d:18.3 km (  3 mi) WSW of Idyllwild, CA
    0 mi. N   of the San Jacinto Fault Zone
    
    M1.6 2005/02/23 09:57:05 UTC 33.698N 116.734W d:19.2 km ( 3 mi) SSW of Idyllwild, CA O mi of the San Jacinto Fault Zone
    M1.6 2005/02/23 10:24:42 UTC 32.838N 115.458W d:11.0 km ( 5 mi) WNW of Holtville, CA M1.4 2005/02/23 10:47:24 UTC 32.845N 115.454W d:10.0 km ( 5 mi) WNW of Holtville, CA M2.2 2005/02/23 11:00:06 UTC 32.822N 115.458W d:15.6 km ( 5 mi) W of Holtville, CA M1.9 2005/02/23 11:40:45 UTC 32.840N 115.463W d:11.2 km ( 5 mi) WNW of Holtville, CA M1.9 2005/02/23 11:41:36 UTC 32.825N 115.455W d:11.5 km ( 4 mi) W of Holtville, CA M1.9 2005/02/23 12:59:42 UTC 32.817N 115.450W d:15.4 km ( 4 mi) W of Holtville, CA Micro quake swarm: The Imperial Fault is inferred to be connected with the San Jacinto Fault zone.
    M2.3 2005/02/23 13:39:34 UTC 34.405N 116.468W d:3.6 km ( 20 mi) N of Yucca Valley, CA 3 mi. SSW of the Emerson Fault
    M2.4 2005/02/23 13:38:13 UTC 34.408N 116.467W d:3.5 km ( 20 mi) N of Yucca Valley, CA 3 mi. SSW of the Emerson Fault
    M1.6 2005/02/23 14:09:09 UTC 32.827N 115.455W d:9.4 km ( 4 mi) WNW of Holtville, CA Imperial Fault Zone
    M1.4 2005/02/23 14:35:34 UTC 34.579N 116.276W d:9.0 km ( 12 mi) SW of Ludlow, CA Pisgah Fault
    M2.1 2005/02/23 15:54:55 UTC 32.843N 115.455W d:11.6 km ( 5 mi) WNW of Holtville, CA Imperial Fault Zone
    M1.2 2005/02/23 16:00:33 UTC 34.409N 116.460W d:9.4 km ( 20 mi) N of Yucca Valley, CA 3 mi. SSW of the Emerson Fault
    M1.1 2005/02/23 21:26:05 UTC 33.688N 116.712W d:17.3 km ( 4 mi) S of Idyllwild, CA 0 mi. NW of the San Jacinto Fault Zone
    M1.7 2005/02/23 22:32:30 UTC 34.120N 117.743W d:11.8 km ( 2 mi) WNW of Claremont, CA 0 mi. N of the Sierra Madre Fault Zone
    *M1.3 2005/02/24 00:37:02 UTC 33.248N 116.289W d:11.6 km ( 5 mi) E of Borrego Springs, CA the San Jacinto Fault Zone
    *M1.7 2005/02/24 01:27:42 33.735 -117.513 9.8 12 km ( 7 mi) S of El Cerrito, CA Elsinore Fault Zone

    MT ULF UPDATE: February 24, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was infrasonic harmonic activity below 2 Hz on Thursday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.63 Hz (-74.85 dBv), and inferred to be associated with the East Central California region. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was higher during the past 24 hours. Also, there were no observed unclamping incidents. There were a few detected low amplitude sharp upper level infrasonic harmonic bursts. There were periods with a 5 Hz spectral line, which was detected by the active tracking filter. The 5 Hz spectral activity is associated with high crustal stress along the plate boundary and the San Andreas Fault System in Southern California. There was strong piezomagnetic activity coming from a poorly constrained shallow micro quake epicentered in the Argus Range (ECSZ) between the Panamint and Southern Owens Valley, which is most likely related to the Wilson Canyon fault north of China Lake, CA. The increase in piezomagnetic (ULF) activity elevated the MT peak reading to 9.3 units of regional lithospheric stress.

    M4.3 2005/02/24 03:39:18 UTC 41.413N 126.639W d:10.0 km (128 mi) W of Crescent City, CA


     24-FEB-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph


     24-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     24-FEB-2005 15:00 - 18:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     24-FEB-2005 18:00 - 21:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     24-FEB-2005 21:00 - 23:59 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    Note: Strong (5 to 6Hz) Spectral lines appear to be related to building stress along the existing and inferred developing (new) plate boundary between the Southern Owens Valley, across the Garlock fault zone, and into the Mojave Desert region east of Barstow, CA along a NW right-lateral strike-slip alignment from Little Lake to Calico via a left step over from the Pisgah fault to the West Calico-Blackwater fault, south into the Salton Trough, Northern Baja, and the Gulf of California. Long periods with resonant harmonics at 1 Hz are associated with the San Andreas Fault zone in Southern California. The lowest infrasonic frequencies are associated with increased seismic activity along the plate boundary within the Gulf of California, Baja and Southern California.

    MT ULF UPDATE: February 25, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was strong infrasonic harmonic activity below 2 Hz on Friday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.02 Hz (-71.28 dBv), and inferred to be associated with the ECSZ Mojave Desert Block. The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was decreased (negative). All daily charts were updated to reflect the latest analysis.


     25-FEB-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph


     26-FEB-2005 00:00 - 03:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


    MT ULF UPDATE: February 26, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was infrasonic harmonic activity below 2 Hz on Saturday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.58 Hz (-74.59 dBv). The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was slightly increased (positive). All daily charts were updated to reflect the latest analysis.


     26-FEB-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph


     26-FEB-2005 12:00 - 15:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     26-FEB-2005 15:00 - 18:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     27-FEB-2005 00:00 - 03:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram

    Note: Strong (5 to 6Hz) Spectral lines appear to be related to building stress along the existing and inferred developing (new) plate boundary between the Southern Owens Valley, across the Garlock fault zone, and into the Mojave Desert region east of Barstow, CA along a NW right-lateral slip alignment from Little Lake to Calico via a left step over from the Pisgah fault to the West Calico-Blackwater fault. Long periods with resonant harmonics at 1 Hz are associated with the San Andreas Fault zone in Southern California. The lowest infrasonic frequencies are associated with increased seismic activity along the plate boundary within the Gulf of California, Baja and Southern California.
    M1.3  2005/02/26 12:21:40  33.407 -116.395  13.2   18 km ( 11 mi) N   of Borrego Springs, CA
     0 mi. S   of the San Jacinto Fault Zone
    
    M1.8 2005/02/26 12:28:20 32.725 -115.511 18.9 2 km ( 1 mi) ESE of Heber, CA 5 mi. SW of the Imperial Fault
    M2.9 2005/02/26 13:51:10 32.416 -115.115 0.0 14 km ( 9 mi) N of Guadalupe Victoria, Mexico O mi of the Imperial Fault
    M1.5 2005/02/26 15:09:06 34.522 -116.514 3.6 39 km ( 24 mi) SW of Ludlow, CA 0 mi. N of the Camprock Fault
    M2.2 2005/02/26 15:22:50 32.044 -116.639 22.4 19 km ( 12 mi) N of Ensenada, Mexico 49 mi. SE of the Rose Canyon Fault
    M1.7 2005/02/27 01:22:43 34.279 -117.103 5.0 8 km ( 5 mi) N of Running Springs, CA 8 mi. SW of the Helendale Fault
    M1.5 2005/02/27 01:25:40 34.725 -116.305 8.0 13 km ( 8 mi) W of Ludlow, CA 5 mi. ENE of the Pisgah Fault

    MT ULF UPDATE: February 27, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was infrasonic harmonic activity below 2 Hz on Sunday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.63 Hz (-74.10 dBv). The ULF and MT activity level was low during the past 24 hours. The inferred mean average unclamping level was slightly higher during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was slightly increased (positive). All daily charts were updated to reflect the latest analysis.

    There was a detected ULF signal burst that appears to be associated with a micro quake epicentered near Anza, CA.


     27-FEB-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph


    MT ULF UPDATE: February 28, 2005

    Note: The San Jacinto Fault Alert along with Inland Empire advisory continues to stay in effect. There was no infrasonic harmonic activity below 2 Hz on Monday. The ULF and MT activity level was low during the past 24 hours. The inferred mean average unclamping level was slightly lower during the past 24 hours. Also, there were no observed unclamping incidents. The ULF mean average was slightly increased (positive). All daily charts were updated to reflect the latest analysis.

    M3.0 2005/03/01 02:35:42 UTC 36.840N 121.572W d:6.8 km (2 mi) W of San Juan Bautista, CA

    There was a detected ULF signal burst that appears to be associated with a micro quake epicentered near Lake Isabella, CA. Also, there was a long duration (distant) infrasonic harmonic signal at 4 Hz which was constant for 3 hours during the early morning hours that may be related to the Vancouver Island Pacific Northwest offshore seismic swarm. A sudden temporary drop in MT activity was also inferred to be associated with a micro quake epicentered near Kodiak Island, AK. Another region with detected ULF activity was from near San Juan Bautista, CA.


     28-FEB-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph


     28-FEB-2005 06:00 - 09:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram


     28-FEB-2005 09:00 - 12:00 UTC
    ECSZ Mojave Desert Block: Infrasonic Spectrogram




    NORTH AMERICAN VOLCANIC UNREST and ERUPTION UPDATE


    CENEPRED-Mexico


    Latest Popocatépetl Volcano Update

    AVO-Alaska

    Alaska Volcano Observatory

    Aleutian Islands

    Latest Korovin Volcano Update

    Cook Inlet:

    Latest Mount Spurr Update

    Alaska Peninsula:

    Latest Mount Veniaminof Update

    CVO-Pacific Northwest:

    Cascades Volcano Observatory

    Cascades:

    Latest Mount Saint Helens Update



    LUNAR-TIDAL AND SOLAR PERIODICITIES RELATED TO EARTHQUAKES

    (Tidal)Triggering Factor of Strong Earthquakes and Its Prediction Verification

    Tidal Triggering: Caught in the Act

    Monthly Lunar-Tidal Calendar

    San Simeon:
    The next New Moon and resulting Spring Tides will be on February 8, 2005 (22:30 UTC); with a predicted differential of 8.53 feet, and a significant lunar-tidal phase angle(transition) between 17:12 UTC (02/08/2005) and 00:19 UTC (02/09/2005) along the coast of Central California.

    The next Full Moon and resulting Spring Tides will be on February 24, 2005 (04:55 UTC); with a predicted differential of 6.08 feet, and a signficant lunar-tidal phase angle (transition) between 17:23 UTC (02/23/2005) and 00:16 UTC (02/24/2005) along the coast of Central California.


    Newport Beach:

    The next New Moon and resulting Spring Tides will be on February 8, 2005 (22:30 UTC) ; with a predicted differential of 8.45 feet, with a significant lunar-tidal phase angle(transition) between 16:07 UTC (02/08/2005) and 23:21 UTC (02/08/2005) along the coast of Southern California.

    The next Full Moon and resulting Spring Tides will be on February 24, 2005 (04:55 UTC); with a predicted differential of 6.02 feet, and a significant lunar-tidal phase angle (transition) between 16:18 UTC (02/23/2005) and 23:18 UTC (02/23/2005) along the coast of Southern California.

    San Simeon, California
    7 February 2005 - 9 February 2005
    35.6417° N, 121.1883° W
    
    2005-02-07  14:59 UTC   Sunrise
    2005-02-07  16:25 UTC   6.69 feet  High Tide
    2005-02-07  23:40 UTC  -1.77 feet  Low Tide
    2005-02-08  01:38 UTC   Sunset
    2005-02-08  06:07 UTC   4.15 feet  High Tide
    2005-02-08  11:03 UTC   1.53 feet  Low Tide
    2005-02-08  14:58 UTC   Sunrise
    2005-02-08  17:12 UTC   6.79 feet  High Tide
    2005-02-08  22:30 UTC   New Moon
    2005-02-09  00:19 UTC  -1.74 feet  Low Tide
    2005-02-09  01:39 UTC   Sunset
    2005-02-09  06:41 UTC   4.41 feet  High Tide
    2005-02-09  11:52 UTC   1.21 feet  Low Tide
    2005-02-09  14:57 UTC   Sunrise
    

    Balboa Pier, Newport Beach, California
    7 February 2005 - 9 February 2005
    33.6000° N, 117.9000° W
    
    2005-02-07  14:42 UTC   Sunrise
    2005-02-07  15:20 UTC   6.62 feet  High Tide
    2005-02-07  22:42 UTC  -1.75 feet  Low Tide
    2005-02-08  01:28 UTC   Sunset
    2005-02-08  05:02 UTC   4.11 feet  High Tide
    2005-02-08  10:05 UTC   1.52 feet  Low Tide
    2005-02-08  14:42 UTC   Sunrise
    2005-02-08  16:07 UTC   6.72 feet  High Tide
    2005-02-08  22:30 UTC   New Moon
    2005-02-08  23:21 UTC  -1.73 feet  Low Tide
    2005-02-09  01:29 UTC   Sunset
    2005-02-09  05:36 UTC   4.36 feet  High Tide
    2005-02-09  10:54 UTC   1.20 feet  Low Tide
    2005-02-09  14:41 UTC   Sunrise
    

    San Simeon, California
    23 February 2005 - 25 February 2005
    35.6417° N, 121.1883° W
    
    2005-02-23  14:41 UTC   Sunrise
    2005-02-23  17:23 UTC   5.55 feet  High Tide
    2005-02-24  00:16 UTC  -0.53 feet  Low Tide
    2005-02-24  01:54 UTC   Sunset
    2005-02-24  04:55 UTC   Full Moon
    2005-02-24  06:33 UTC   4.11 feet  High Tide
    2005-02-24  11:53 UTC   1.36 feet  Low Tide
    2005-02-24  14:40 UTC   Sunrise
    2005-02-24  17:54 UTC   5.41 feet  High Tide
    2005-02-25  00:38 UTC  -0.35 feet  Low Tide
    2005-02-25  01:55 UTC   Sunset
    2005-02-25  06:53 UTC   4.28 feet  High Tide
    2005-02-25  12:26 UTC   1.18 feet  Low Tide
    

    Balboa Pier, Newport Beach, California
    23 February 2005 - 25 February 2005
    33.6000° N, 117.9000° W
    
    2005-02-23  14:26 UTC   Sunrise
    2005-02-23  16:18 UTC   5.50 feet  High Tide
    2005-02-23  23:18 UTC  -0.52 feet  Low Tide
    2005-02-24  01:43 UTC   Sunset
    2005-02-24  04:55 UTC   Full Moon
    2005-02-24  05:28 UTC   4.07 feet  High Tide
    2005-02-24  10:55 UTC   1.34 feet  Low Tide
    2005-02-24  14:25 UTC   Sunrise
    2005-02-24  16:49 UTC   5.36 feet  High Tide
    2005-02-24  23:40 UTC  -0.34 feet  Low Tide
    2005-02-25  01:44 UTC   Sunset
    2005-02-25  05:48 UTC   4.24 feet  High Tide
    2005-02-25  11:28 UTC   1.17 feet  Low Tide
    2005-02-25  14:24 UTC   Sunrise
    

    NOAA: Near-Real Time Data


    NOAA Tides for California Coastal Regions



    Space Weather Alerts and Warnings Timeline



    Special Statement Regarding Contributions to the Lab

    It's the time of year when I begin the official winter fund drive to help keep the lab operating throughout the new year. One item that needs some emphasis is the annual operating costs related to being a public corporation within the state of California; a fee that is fixed at 800 Dollars annually, and paid for the privilege of being a public entity. This fiscal year, I directly paid to the State Secretary approximately 2 Thousand Dollars in Franchise Taxes to keep the lab chartered by the State of California. So you're all now being encouraged to participate again. The depth of my research is increasing exponentially as events occur and I focus on the anomalously high levels in both ULF and MT activity observed since last Fall. Also, there is the unprecedented levels of unclamping now being detected from my research lab located on the Pacific and North American Plate Boundary in Southern California since early last Summer. All of this points towards having another extremely busy (6th) year of research and posting the results of my daily analysis to the internet in near-real-time. My 365 days of ground-breaking research, will keep you informed and prepared for the future.

    "I Thank you for all of the positive feedback and friendly help that I've received from supporters and associates worldwide. Especially to geologist, Jim Berkland for allowing me the use of his SYZYGY web site, to get the latest information out to the public."

    IMPORTANT:
    For those who elect to mail in a personal check:
    Please send an email to the address listed on my website for alternate instructions.
    Also, All Credit Card funded donations using the Paypal donation button will automatically be rejected unless you request easy to follow alternate instructions via email and follow them to completion. Thank you,

    Frank Condon -GeoSeismic Labs 2005


    MT ULF Charts and Experimental Forecast

    The Latest Near Real-Time Data from GeoSeismic Labs

    The Southern California Seismic Alert

    The most recent 24 hr. MT peak reading (01-MAR-2005 03:00 UTC) was measured at 8.4 units of regional lithospheric stress.



    Graphic: Chart for Regional Lithospheric Stress Level

    Graphic: Chart for Global Seismicity vs. Mean Average ULF

    Graphic: Chart for ULF STD DEV

    Graphic:(AE)Unclamping Level Chart

    Graphic: Chart for ULF Mean Average

    Graphic: Recent ULF Report

    Graphic: Recent Anomalies Report

    Graphic: Recent Anomalies Report

    Graphic: Recent Anomalies Report

    Graphic: Recent Anomalies Report

    Graphic: Recent Anomalies Report

    Graphic: Recent Anomalies Report

    Graphic: Recent Anomalies Report

    Graphic: Gulf of CA Precursor



    This information is provided as a public service by GeoSeismic Labs of California, a State Registered "Not for Profit" Corporation Since 2001.


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