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. 

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

FEB-2005: Bulletin of the Global Volcanism Network

(WOVO) World Organization of Volcano Observatories

Major North American Volcanoes of Interest

North American Volcanic Unrest Updates

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

Probing Volcanoes: USGS Public Lecture in Multimedia .wmv (12/4/2004)

Yellowstone Supervolcano: Transcript

The 1700 Seattle SuperQuake & Japanese Tsunami: Nature

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

Earthquake Prediction: Predicting the Unpredictable?

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

Foreshocks & Aftershocks of the Great 1857 Fort Tejon, CA Earthquake

The Great 1857 Fort Tejon Earthquake: Shake, Rattle & Roll

Quakes Along Central San Andreas Fault Peak Every Three-Years

Volcanoes and the San Andreas Fault

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

Deep Tremors Along the San Andreas Fault

Aftershocks of the 1952 Tehachapi Earthquake

Mantle Downwelling Beneath the Transverse Range

San Jacinto Fault Zone Advisories
&
MT ULF Updates
Released by
GeoSeismic Labs of California

(View MT ULF REPORTS published in October 2004)


(View MT ULF REPORTS published in November 2004)


(View MT ULF REPORTS published in December 2004)


(View MT ULF REPORTS published in January 2005)


(View MT ULF REPORTS published in February 2005)


(View MT ULF REPORTS published in March 2005)


(View a previously Published MT ULF REPORT


(View the Currently Published MT ULF REPORT

MT ULF UPDATE: April 1, 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 Friday. The ULF and MT activity level was low during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. The ULF mean average was decreased (negative). All daily charts were updated to reflect the latest analysis.

The most recently detected ULF activity was apparently associated with a micro quake epicentered in San Bernardino, CA along the San Jacinto Fault zone.

 01-MAR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

MT ULF UPDATE: April 2, 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 1.68 Hz (-74.31 dBv). The ULF and MT activity level was low during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. The ULF mean average was decreased (negative) and reached a low point not observed since mid-January 2005. All daily charts were updated to reflect the latest analysis.

The most recently detected ULF activity was apparently associated with a micro quake epicentered in near Borrego Springs, CA. Also, there was some ULF activity related to micro quakes epicentered near Coso Junction and Ludlow, CA.

 02-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

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

MT ULF UPDATE: April 3, 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 1.81 Hz (-75.33 dBv). The ULF and MT activity level was low during the past 24 hours. The inferred mean average unclamping level was higher during the past 24 hours. The ULF mean average was decreased (negative) and reached another low point not observed since early January 2005. All daily charts were updated to reflect the latest analysis.

The most recently detected ULF activity related to a micro quake epicentered near Ludlow, CA.

 03-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

 03-APR-2005 18:00 - 21:00 UTC
ECSZ Mojave Desert Block: Infrasonic Spectrogram

MT ULF UPDATE: April 4, 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 to moderate during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. The ULF mean average was increased (positive). All daily charts were updated to reflect the latest analysis.

The most recently detected ULF activity related to a micro quake epicentered near Ludlow, CA and Kernville, CA. Also, tonight there was a period with Infrasonic (AE) activity associated with a micro quake epicentered near Palmdale, CA.

 04-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

 05-APR-2005 03:00 - 06:00 UTC
ECSZ Mojave Desert Block: Infrasonic Spectrogram

MT ULF UPDATE: April 5, 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 Tuesday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.99 Hz (-75.06 dBv). The ULF and MT activity level was moderate to high during the past 24 hours. The inferred mean average unclamping level was basically little changed during the past 24 hours. The ULF mean average was unchanged. All daily charts were updated to reflect the latest analysis.

The was a high amplitude piezomagnetic burst, which appears to be associated with a micro quake epicentered near Tres Pinos, CA and the San Andreas Fault. The MT peak reading was 10.00 units of regional lithospheric stress as a direct result of this anomalous burst. ULF activity appears to have finally stabilized again.

 05-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

MT ULF UPDATE: April 6, 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 0.43 Hz (-68.03 dBv). The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was basically unchanged during the past 24 hours. The ULF mean average was decreased (negative) and reached a low point for the year. All daily charts were updated to reflect the latest analysis.

M3.0 2005/04/06 04:20:26 UT 32.122N 115.002W d:0.7 km ( 13 mi) SSE of Guadalupe Victoria, Mexico

Deep Crustal Infrasonic Resonant Harmonic energy was detected this evening and associated with the Pacific & North American Plate Boundary in Baja, Mexico and So. California. There was an increase in deep crustal infrasonic harmonic activity which appears to be related to the San Jacinto fault near Idylwild, CA. There was a ULF signal burst, which was associated with a micro quake epicentered near Indio, CA.

 06-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

 07-APR-2005 00:00 - 03:00 UTC
ECSZ Mojave Desert Block: Infrasonic Spectrogram

MT ULF UPDATE: April 7, 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 1.69 Hz (-75.16 dBv). The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was slightly increased during the past 24 hours. The ULF mean average was decreased (negative) and reached a new lowest point for the year. All daily charts were updated to reflect the latest analysis.

M3.0 2005/04/07 16:06:06 UT 35.639N 120.932W d:6.7 km ( 7 mi) SSW of Lake Nacimiento, CA

 07-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

 05-APR-2005: Piezomagnetic Burst: Tres Pinos (SAF), CA

MT ULF UPDATE: April 8, 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 Friday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.66 Hz (-75.56 dBv). The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was slightly decreased during the past 24 hours. The ULF mean average was increased (positive). All daily charts were updated to reflect the latest analysis.

The latest detected ULF activity was associated with a micro quake epicentered near Desert Hot Springs, CA.

The New Moon and Associated

Spring Tides

Advisory is Now in Effect!

 08-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

 09-APR-2005 00:00 - 03:00 UTC
ECSZ Mojave Desert Block: Infrasonic Spectrogram

MT ULF UPDATE: April 9, 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 1.73 Hz (-74.06 dBv). The ULF and MT activity level was moderate to high during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. The ULF mean average was increased (positive). All daily charts were updated to reflect the latest analysis.

Tonight's MT Peak Reading was measured at 10.3 units of regional lithospheric stress, which is the highest recorded this year, and last exceeded on November 28, 2004 by an 11.2 unit pulsation. Last March 28th, I detected an MT Pulse which appeared to be a precursor for today's M5.9 epicentered near Kodiak Island, AK. This is the fourth time that an MT pulse has preceded an earthquake in the region, beginning with the Nenana Mtn Quake on October 23, 2002, which was a foreshock to the November 3, 2002 Denali Fault Earthquake. The Aleutian Megathrust appears to be awakening and the nucleation source of many previous seismic events, including the June 21, 2004 Castle Mountain fault earthquake that was sharply felt in Anchorage, AK. I infer that the recent increase in activity from Southeastern AK and British Columbia(Queen Charlotte Islands) to the Interior of Alaska, is related to a build-up of deep crustal stress in the region. OTher ULF activity appears to be assocaited with the plate boundary in Southern California near Frazier Park, and from Northern Baja, CA Mexico. A long duration disturbance may have been related to a micro quake epicentered near Malibu and the coast of Southern California.

Southern Alaska
The New Moon and resulting Spring Tides occurred at 20:35 UTC on April 8, 2005; with a predicted differential of 15.71 feet, and a significant lunar-tidal phase angle(transition) between 10:15 UTC (04/09/2005) and 16:32 UTC (04/09/2005) along the coast of Southern Alaska. Today's M5.9 earthquake was right within the predicted window of maximum lunar-tidal phase angle (transition). Also, it was epicentered within the maximum 66 ft. seaward displacement zone that occured in 1964 during the second largest Megathrust earthquake in modern history. An operating magnetometer located on Kodiak Island, recorded a significant geomagnetic precursor within several hours of the Mw9.2 seismic event, which triggered a Tsunami that also caused a large amount of destruction in Anchorage/Valdez, Alaska and Crescent City, CA.

 9 APR 2005  ( 99)

     ot  = 15:16:29.10   +/-   1.77              KODIAK ISLAND REGION, ALASKA    
     lat =      56.319   +/-    3.4
     lon =    -154.528   +/-    2.6              MAGNITUDE 5.9 (GS)       
     dep =        19.2   +/-   11.1   

     85 km (55 miles) NE of Chirikof Island, Alaska (pop &< 100)
     140 km (85 miles) SSW of Larsen Bay, Alaska (pop 100)
     610 km (380 miles) SSW of Anchorage, Alaska
     1230 km (760 miles) W of JUNEAU, Alaska

Whittier, Passage Canal, Alaska
8 April 2005 - 9 April 2005
60.7750° N, 148.6917° E

2005-04-08  03:27 UTC  -0.88 feet  Low Tide
2005-04-08  09:07 UTC   Sunset
2005-04-08  09:42 UTC  13.31 feet  High Tide
2005-04-08  15:53 UTC  -1.30 feet  Low Tide
2005-04-08  19:05 UTC   Sunrise
2005-04-08  20:35 UTC   New Moon
2005-04-08  22:06 UTC  12.55 feet  High Tide
2005-04-09  04:03 UTC  -0.57 feet  Low Tide
2005-04-09  09:09 UTC   Sunset
2005-04-09  10:15 UTC  13.74 feet  High Tide
2005-04-09  15:16 UTC   M5.9 55.985 -154.232   4.4  107 km ( 66 mi) S   of Akhiok, AK
2005-04-09  15:33 UTC   M3.4 55.980 -154.203   5.0  107 km ( 67 mi) S   of Akhiok, AK
2005-04-09  16:02 UTC   M3.8 55.857 -154.160  28.9  121 km ( 75 mi) S   of Akhiok, AK
2005-04-09  16:32 UTC  -1.97 feet  Low Tide
2005-04-09  17:20 UTC   M3.6  55.947 -154.345  25.0  111 km ( 69 mi) S   of Akhiok, AK
2005-04-09  19:02 UTC   Sunrise
2005-04-09  22:49 UTC  12.26 feet  High Tide
2005-04-10  04:38 UTC   0.11 feet  Low Tide

The New Moon and Associated

Spring Tides

Advisory is Now in Effect!

 09-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

MT ULF UPDATE: April 10, 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 Sunday. The ULF and MT activity level was low during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. The ULF mean average was unchanged. All daily charts were updated to reflect the latest analysis.

ULF activity was detected from Fontana and near Cabazon, CA.

 10-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

MT ULF UPDATE: April 11, 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 Monday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.91 Hz (-74.61 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. The ULF mean average was decreased (negative). All daily charts were updated to reflect the latest analysis.

Increased ULF activity was detected from near Borrego Springs and Anza, CA.

 11-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

MT ULF UPDATE: April 12, 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 Tuesday. 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. The ULF mean average was decreased (negative) and reached the same point as last observed in late December 2004. All daily charts were updated to reflect the latest analysis.

M3.9 2005/04/12 11:06:46 UT 32.727N 116.828W d:19.0 km ( 3 mi) E of Jamul, CA
M3.2 2005/04/12 13:53:15 UT 35.584N 120.870W d: 4.4 km ( 9 mi) WNW of Templeton, CA

Once again, there were a couple of periods with ULF activity associated with the San Jacinto fault zone near Anza and Borrego Springs, CA.

It's inferred that a step over of crustal stress out of the region from the Salton Sea to the Elsinore fault transfered to a secondary fault from Campo to El Cajon, CA which caused a magnitude 3.9 earthquake in its aftermath. The primary concern is the continuing build-up and nucleation of crustal stress out of the San Jacinto fault zone via step-over being focused towards the Northern Baja California, Mexico to Southern California coastal region, and the active Newport-Inglewood & Rose Canyon faults. Also, the previously reported ULF activity was from near both Fontana and Cabazon, CA at it's most northern and closest point(Cajon Pass to Yucaipa, CA) to the Pacific & North American Plate Boundary.

Here's a another previously observed indication for the current state of the ongoing inferred crustal stress build-up in Southern California.
06-APR-2005 MT ULF Report.

Here's a related recently detected Strong Infrasonic Resonant Harmonic Spectrogram Captured on 07-APR-2005 00:00 - 03:00 UTC.
Acoustic Emission: Spectrogram

Also, I must remind you the inferred Pacific & North American Plate Boundary's Unclamping Level has not recovered to its (previously observed) former level measured prior to July 2004. As long as it remains like this, I'm going to stay with the current alert level for Southern California, and even more specifically the San Jacinto Fault Zone, which is being affected by the (inferred) greater lithospheric stress now in control of it.

 12 APR 2005  (102)

     ot  = 11:06:46.00   +/-   0.00         SOUTHERN CALIFORNIA             
     lat =      32.726   +/-    0.0
     lon =    -116.823   +/-    0.0              MAGNITUDE 3.9 (PAS)      
     dep =        19.7   +/-    0.0   

     25 km (15 miles) NW of Tecate, Baja California, Mexico (pop 52,000)
     30 km (15 miles) NE of Tijuana, Baja California, Mexico (pop 1,148,000)
     30 km (20 miles) E of San Diego, California (pop 1,223,000)
     2295 km (1420 miles) NW of MEXICO CITY, D.F., Mexico
 
     ML 3.9 (PAS). Felt (IV) at Alpine, Bonita, Boulevard, El Cajon,
     Jamul, Lakeside, La Mesa, Lemon Grove, National City, Oceanside,
     Pine Valley, Poway, Ramona and Santee; (III) at Campo, Carlsbad,
     Chula Vista, Del Mar, Descanso, Escondido, Imperial Beach, Julian,
     La Jolla, San Diego, San Marcos, Spring Valley and Valley Center;
     (II) at Coronado, Encinitas, Fallbrook, Solana Beach and Vista.

 12-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

MT ULF UPDATE: April 14, 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 Thursday. 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. The ULF mean average was slightly decreased (negative). All daily charts were updated to reflect the latest analysis.

There were several observed periods with piezomagnetic activity associated with the Mojave Desert Block to the Salton Sea (Sink).

It's inferred that crustal stress is now increasing rapidly from the Salton Sea region and further north into the Mojave Desert Block the recent piezomagnetic activity appears to be focused on the Helendale fault with an emphasis on the Big Bear Lake to Victorville region. However, it's best to keep the latest advisory to an area from Northern Baja to Yucca Valley, Lucerne Valley and Victor Valley to Barstow and Ridgecrest, CA (Mojave Desert Block/ECSZ).

 13-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

 14-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

MT ULF UPDATE: April 15, 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 Friday. 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. The ULF mean average was decreased (negative). and reached a new lowest point for the year. The MT peak reading was measured at 9.2 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

M3.4 2005/04/16 10:13:15 35.891 -120.434 8.5 1 km ( 1 mi) S of Parkfield, CA
M3.1 2005/04/16 09:04:35 34.855 -119.221 8.5 6 km ( 4 mi) W of Pine Mountain Club, CA

Strong Piezomagnetic Activity was observed during the past 24 hours. I activated an alert for the Mojave Desert Block as a result of the inferred increase in ULF activity associated with the nucleation of crustal stress out of the ECSZ and into the region from Ridgecrest to Victorville, CA. Stress that nucleates northwest out of the ECSZ splits into two separate directions, which follows the Owens Valley and the Garlock fault zone. Apparently the Garlock fault is transfering the increase in stress across the San Andreas fault west of Frazier Park and Gorman, CA. The Pine Mountain Fault is inferred to be an extension of the Garlock fault. The small earthquake epicentered north of Los Angeles was itself to the north of the Big Pine/Pine Mountain fault and appears to be epicentered on the San Andreas fault's Mojave Segment. We rarely see any kind of seismic activity which is directly epicentered on the San Andreas fault. That movement was enough to also affect the Parkfield region to the north. The signs of increased piezomagnetic activity were two micro quakes, one of which was epicentered north of Big Bear Lake, and the other was epicentered NE of Apple Valley, CA. As a result, the Helendale fault was immediately placed under an advisory along with the blanket alert for the ECSZ Mojave Desert Block.

The implications of the latest increase in seismic activity are that the Western Transverse Range and the San Andreas Fault are mechanically coupled and prone to having large and great earthquakes as witnessed in 1857 when the Carrizo and Mojave segments both ruptured (Fort Tejon). Last September's Parkfield M6.0 earthquake may have been a prelude to the next great earthquake. The prior Mw6.5 San Simeon earthquake appears to have been triggered by the nucleation of crustal stress out of the ECSZ via the Western Garlock fault zone and across the San Andreas fault onto the Pacific side of the plate boundary, where it increased the stress along the Big Pine/Pine Mountain fault that follows NW into the region between Paso Robles and San Simeon, CA. It's inferred that the current piezomagnetic activity is related to the migration of fluids along the Plate Boundary and adjacent secondary faults in Southern California.

Magnitude   :   3.1  Ml
 Time        :   16 Apr 2005   02:04:35 AM PDT
             :   16 Apr 2005   09:04:35 UTC
 Coordinates :   34 deg. 51.30 min. N,  119 deg. 13.26 min. W
 Depth       :     5.3 miles (  8.5 km)
 Quality     :   Excellent
 Event ID    :   14137996
 Location    :     16 mi. W   of Frazier Park, CA
             :     38 mi. SSW of Bakersfield, CA
             :     26 mi. N   of SBCD (quarry)
             :      0 mi. SSW of the San Andreas Fault

 15-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

MT ULF UPDATE: April 16, 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 1.69 Hz (-74.77 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. The ULF mean average was decreased (negative). and reached another new lowest point for the year. The MT peak reading was measured at 9.0 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

M5.1 2005/04/16 19:18:13 35.027 -119.178 10.8 19 km ( 12 mi) WSW of Mettler, CA
M3.2 2005/04/16 21:29:05 38.204 -117.815 0.0 25 km ( 16 mi) ESE of Tonopah Junction, NV

As a result of the increase in inferred crustal stress, as outlined in my previous report "via the Garlock fault", I'm going to keep the short term Mojave Desert Block Blanket Alert in force until I see several consecutive days without anomalous piezomagnetic activity. However, today began quite active and peaked just prior to the M5.1 earthquake epicentered near the White Wolf and Garlock fault's intersection with the Pacific & North American Plate Boundary, and the San Andreas Fault's Mojave Segment, which last ruptured in 1857.

The M3.1 epicentered on the San Andreas fault west of Frazier Park is a precursor to incrased unlocking of the Big Bend first observed in February 2004 during the first incident of strong unclamping and decompression, which was detected by my lab here in the High Desert near the Cajon Pass.

The first detected episode was February 12, 2004., and the next episode was on February 14, 2004 several hours before a M4.3 earthquake, which was epicentered near Frazier Park, Mettler, Gorman, and Wheeler Ridge, CA. Here's an example of the unclamping which was detected just prior to the M4.3 earthquake on February 14, 2004 and an origin time of 12:43:11 UTC. There are several more incidents of unclamping which lasted until February 25, 2004, which was hours after a M3.6 earthquake epicentered near Hemet, CA on the San Jacinto fault. There is definitely a link between the San Andreas fault's Mojave segment and the San Jacinto fault, being inferred from the spectrographic evidence.

The very next incident of unclamping was on July 12, 2004,   two days after a M3.7 earthquake epicentered 35 miles NW of Ridgecrest, CA. However, it did not come on as abruptly, and became nearly constant within several months of its beginning. The unclamping increased its level in increments from July 2004 through October 2004, and really went extremely high just a few days prior to December 26, 2004. Shortly after there was a M4.3 earthquake epicentered near Fontana, CA. So, I knew that it was an increase in fluids migrating west along the plate boundary at the Cajon Pass that was causing it. That's where my current research stopped until the most recent piezomagnetic bursts associated with the Helendale fault as precursor to the seismic events of April 16, 2005 near the western end of the locked   "big bend" along the San Andreas fault. To Be Continued...

16 APR 2005  (106)

     ot  = 19:18:12.00   +/-   0.00         CENTRAL CALIFORNIA              
     lat =      35.012   +/-    0.0
     lon =    -119.174   +/-    0.0              MAGNITUDE 5.1 (PAS)      
     dep =         0.4   +/-    0.0   

     40 km (25 miles) SSW of Bakersfield, California (pop 247,000)
     70 km (40 miles) W of Tehachapi, California (pop 10,000)
     80 km (50 miles) NE of Santa Barbara, California (pop 92,000)
     445 km (280 miles) SSE of SACRAMENTO, California
 
     Felt (IV) at Bakersfield, Frazier Park and Tehachapi. Also felt
     (III) at Los Angeles and in much of south-central California.

 16-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

MT ULF UPDATE: April 17, 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 Sunday. 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. The ULF mean average was decreased (negative). and reached another new lowest point for the year. The MT peak reading was measured at 8.5 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

The latest ULF activity was associated with a micro quake epicentered near Rialto, CA. Piezomagnetic activity is low to moderate at times. I believe that the nucleation of deep crustal stress out of the ECSZ and northwest across the Mojave Desert Block is still a significant seismic hazard to areas near Ridgecrest, CA to the Plate Boundary at Wheeler Ridge where the recent M5.1 was triggered less than 12 hours after a small M3.1 earthquake epicentered on the San Andreas Fault. The nucleation of stress across the plate boundary via the Garlock fault zone is driving this kind of anomalous activity, and creating the piezomagnetic bursts inferred to be related to pore pressure changes and fluid migration along the San Andreas fault at depth. I've completed two charts that attempt to portray the environment that led to the triggered M5.1 which was felt strongly in the region of South-Central California. THe first chart is the analysis of historic vs. latest Seismic activity. This chart indicates a thrust fault may have ruptured as a result of M3.1 to its south. The second chart shows the depth of all events vs. distance to the San Andreas fault. From what I could determine using the preliminary catalog, its still several kms between both aftershock zones. There appears to be a reverse thrust fault along Wheeler Ridge at San Emigdio Canyon where all of the aftershocks for the M5.1 are being concentrated. So far, there aren't any aftershocks outside of this zone between the two separate seismic events, indicating that the region between the M3.1 and M5.1 could be the location of the next large aftershock. THe San Andreas fault is a transform fault with a dip that is near vertical. The reverse thruust fault at the base of the Western Transverse Range dips to the south at an angle. So, the aftershocks get shallower to the north. What is interesting is the discontinuity where you see the abrupt depth changes. That is probably where the San Andreas fault takes over for the Reverse Thrust fault. So, I would be aware of any increase in seismic activity in the aseismic pocket between both features.

 17-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

 Preliminary Analysis for the Seismic Event: Part I

 Preliminary Analysis for the Seismic Event: Part II

MT ULF UPDATE: April 18, 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 Monday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.75 Hz (-75.10 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. The ULF mean average was unchanged. The MT peak reading was measured at 8.8 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

Piezomagnetic activity is increasing again. So it's best to keep the short term blanket seismic alert for the Mojave Desert Block in force until further notice.

 18-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

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

MT ULF UPDATE: April 19, 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 Tuesday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 0.413 Hz (-72.11 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. The ULF mean average was increased (positive). The MT peak reading was measured at 9.4 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

M4.3 2005/04/19 18:17:59 UT 31.517N 115.548W d:6.0 km ( 13 mi) ENE of Lázaro Cárdenas, Mexico
M3.1 2005/04/20 06:48:20 UT 32.724N 117.564W d:20.4 km ( 20 mi) WSW of La Jolla, CA

Piezomagnetic activity was quite active during the past 24 hours. ULF and MT activity was detected from near Olancha, Coso Junction, and Baja California, Mexico. Therefore seismic activity picked up in Baja and the offshore region near San Diego, CA along secondary faults west of the plate boundary. So, all alerts are still in effect, including those for the Southern Sierras between Lake Isabella and Walker Pass, which is in line with the direction of crustal stress flow.

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

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

MT ULF UPDATE: April 20, 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 Wednesday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.98 Hz (-75.84 dBv). The ULF and MT activity level was low to moderate during the past 24 hours. The inferred mean average unclamping level was decreased during the past 24 hours. The ULF mean average was unchanged. The MT peak reading was measured at 8.9 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

M3.6 2005/04/20 22:40:48 UT 34.894N 119.088W d:11.4 km ( 5 mi) NE of Pine Mountain Club, CA
M3.0 2005/04/21 03:29:51 UT 31.555N 115.689N d:6.0 km ( 10 mi) NNE of Lázaro Cárdenas, Mexico
M4.1 2005/04/21 06:36:18 UT 33.693N 120.022W d:0.0 km ( 18 mi) SSE of Santa Rosa Is., CA

Piezomagnetic activity was quite active during the past 24 hours. Today's small earthquake epicentered near Pine Mountain Club, CA appears like its M3.1 predecessor to be another primary earthquake epicentered along the San Andreas fault in South-Central California. ULF and MT activity was detected from near Pine Mountain Club, and Baja California, Mexico. So, all alerts are still in effect, including those for the plate boundary in Southern California.

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

MT ULF UPDATE: April 21, 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 1.69 Hz (-75.14 dBv). The ULF and MT activity level was low during the past 24 hours. The inferred mean average unclamping level was decreased during the past 24 hours. The ULF mean average was decreased (negative). The MT peak reading was measured at 8.7 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis. The latest indications are that a several month long trend in MT activity increasing, is under way at the present.

M3.8 2005/04/21 13:26:37 UT 33.660N 120.026N d:6.0 km ( 20 mi) SSE of Santa Rosa Is., CA

Piezomagnetic activity was quiet during the past 24 hours. A small earthquake epicentered near Offshore Santa Barbara, CA was an aftershock to the M4.0 earthquake at the same epicentric location. Lack of Piezomagnetic activity appears to be related to a decrease in overall seismic activity in the region. However, I'd give it at least another 72 hours before dropping any of the short term alerts now in effect. Soon there will be another filtered DAQ channel which is geared towards detecting the upper level piezomagnetic activity between 0.05 and 0.1 Hz. Remember, all alerts are still in effect, including the intermediate term alert for the plate boundary in Southern California. Also, the Full Moon Lunar-Tidal Advisory soon goes into effect. Tides will soon range from the 5.9 to 6.0 foot differential level during the height of the advisory. The areas with observed ULF activity were near Apple Valley and Quail Valley, CA.

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

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

MT ULF UPDATE: April 22, 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 Friday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.90 Hz (-74.05 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. The ULF mean average was decreased (negative) and reached a new lowest (most negative) point for the year. The MT peak reading was measured at 8.6 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

M3.4 2005/04/23 02:19:07 34.106 -117.311 16.6 3 km ( 2 mi) SSW of San Bernardino, CA
Epicentered on the San Jacinto fault.

The latest reported observations in MT activity are a several month long upward trend. This morning, the MT (North-South Facing Array) had a measured temporary (several point) abrupt drop and recovery between 07:30 and 8:45 UTC (4/23). It's inferred that the change detected specifically on the north-South facing MT array was from the the Cajon Pass to Borrego Springs, CA direction and specifically for the San Jacinto fault zone, where tonight, there was a small M3.4 earthquake epicentered near San Bernardino, CA. The changes occuring in the local crustal regime are most likely also related to the recent regional changes detected along the Pacific & North American Plate Boudnary in both South-Central and Southern California. So, all previously issued alerts and warnings are still in effect at this time for the Cajon Pass and the Inland Empire.

Piezomagnetic activity was low to background level during the past 24 hours. Remember, all alerts are still in effect, including the intermediate term alert for the plate boundary in Southern California. Also, the Full Moon Lunar-Tidal Advisory is now in effect for the next 72 hours. Tides will range from the 5.9 to 6.0 foot differential level during the height of this advisory. The areas with observed ULF activity were near Mt. San Gorgonio and Borrego Springs, CA.

 22-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

The Full Moon and Associated

Spring Tides

Advisory is Now in Effect!

MT ULF UPDATE: April 23, 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 1.86 Hz (-75.57 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. The ULF mean average was increased (positive. The MT peak reading was measured at 9.1 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

Piezomagnetic activity was low to moderate during the past 24 hours. Remember, all alerts are still in effect, including the intermediate term alert for the plate boundary in Southern California. Also, the Full Moon Lunar-Tidal Advisory is now in effect for the next 48 hours. Tides will range from the 5.9 to 6.0 foot differential level during the height of this advisory. The areas with observed ULF activity were near Ontario and Anza, CA. In particualr, two micro quakes were epicentered in Ontario, CA which appear to be associated with the recent crustal disturbance and elevated MT readings.

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

The Full Moon and Associated

Spring Tides

Advisory is Now in Effect!

MT ULF UPDATE: April 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 Sunday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.48 Hz (-72.42 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. The ULF mean average was slightly increased (positive). The MT peak reading was measured at 8.4 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

M3.6 2005/04/24 21:44:27 UT 33.811N 118.642W d:0.0 km ( 13 mi) W of Palos Verdes Point, CA M3.2 2005/04/24 21:46:43 UT 33.807N 118.647W d:0.0 km ( 13 mi) W of Palos Verdes Point, CA

Piezomagnetic activity was low during the past 24 hours. Remember, all alerts are still in effect. Offshore seismic activity near Palos Verdes Point, CA is apparently being driven in part from the spring tides induced by a full Moon. Other regions with increased ULF activity were near Morongo Valley, Eureka Valley and Round Valley, CA.

Preliminary Location Data

 Magnitude   :   3.2  Ml
 Time        :   24 Apr 2005   02:46:43 PM PDT
             :   24 Apr 2005   21:46:43 UTC
 Coordinates :   33 deg. 48.41 min. N,  118 deg. 38.85 min. W
 Depth       :     0.0 miles (  0.0 km)
 Quality     :   Excellent
 Event ID    :   10094257
 Location    :     16 mi. S   of Malibu, CA
             :     29 mi. SW  of Los Angeles Civic Center, CA
             :     29 mi. SE  of CAMARILLO (quarry)	
             :     11 mi. WSW of the Palos Verdes Fault

 Magnitude   :   3.6  Ml
 Time        :   24 Apr 2005   02:44:27 PM PDT
             :   24 Apr 2005   21:44:27 UTC
 Coordinates :   33 deg. 48.64 min. N,  118 deg. 38.54 min. W
 Depth       :     0.0 miles (  0.1 km)
 Quality     :   Excellent
 Event ID    :   10094253
 Location    :     16 mi. S   of Malibu, CA
             :     29 mi. SW  of Los Angeles Civic Center, CA
             :     29 mi. SE  of CAMARILLO (quarry)	
             :     11 mi. WSW of the Palos Verdes Fault

2005-04-23  22:08 UTC   0.86 feet  Low Tide
2005-04-24  02:28 UTC   Sunset
2005-04-24  04:11 UTC   5.43 feet  High Tide
2005-04-24  10:09 UTC   Full Moon
2005-04-24  11:04 UTC  -0.50 feet  Low Tide
2005-04-24  13:10 UTC   Sunrise
2005-04-24  17:07 UTC   3.94 feet  High Tide

2005-04-24  21:44 UTC   M3.6 33.811 -118.642   0.0   20 km ( 13 mi) W   of Palos Verdes Point, CA
2005-04-24  21:46 UTC   M3.2 33.807 -118.647   0.0   21 km ( 13 mi) W   of Palos Verdes Point, CA

2005-04-24  22:34 UTC   1.17 feet  Low Tide
2005-04-25  02:29 UTC   Sunset
2005-04-25  04:38 UTC   5.64 feet  High Tide
2005-04-25  11:44 UTC  -0.73 feet  Low Tide
2005-04-25  13:09 UTC   Sunrise
2005-04-25  17:55 UTC   3.66 feet  High Tide
2005-04-25  23:01 UTC   1.52 feet  Low Tide
2005-04-26  02:30 UTC   Sunset

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

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

The Full Moon and Associated

Spring Tides

Advisory is Now in Effect!

MT ULF UPDATE: April 25, 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 moderate during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. The ULF mean average was slightly decreased (negative). The MT peak reading was measured at 8.5 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

Tonight, A high frequency ULF burst was detected during a micro quake epicentered near Pine Mountain Club, South-Central CA (San Andreas Fault). Regions with detected ULF activity were from near Ocotillo Wells, Idylwild and Fontana, CA. A full graphic report for the Pine Mountain Club, CA micro quake and the high frequency ULF signal burst will soon be released.

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

The Full Moon and Associated

Spring Tides

Advisory is Now in Effect!

MT ULF UPDATE: April 26, 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 Tuesday. 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. The ULF mean average was slightly decreased (negative). The MT peak reading was measured at 8.5 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

M4.9 2005/04/27 00:33:00 30.263 -114.125 10.0 109 km ( 67 mi) SE of San Felipe, Mexico
M4.3 2005/04/27 00:24:11 29.989 -114.184 10.0 130 km ( 81 mi) SSE of San Felipe, Mexico

Tonight, another high frequency ULF signal burst was detected during a light earthquake (M4.9) and foreshock (M4.3) epicentered within the Gulf of California and southeast of San Felipe, Baja, California, Mexico along the divergent zone of the Pacific and North American Plate boundary. Regions with detected ULF activity were near Mt San Gorgonio, Apple Valley, and Ludlow, CA. I also moved to a blanket advisory from South-Central, CA to Northern Baja, Mexico as a result of the most recent analysis. A full graphic report will soon be released.

27 APR 2005  (117)

     ot  = 00:24:11.46   +/-   2.01              GULF OF CALIFORNIA              
     lat =      29.989   +/-   19.4
     lon =    -114.184   +/-   10.6              MAGNITUDE 4.3 (GS)       
     dep =        10.0  (geophysicist)

     130 km (80 miles) SSE of San Felipe, Baja California, Mexico (pop 13,000)
     160 km (100 miles) SSW of Puerto Penasco, Sonora, Mexico (pop 26,000)
     210 km (130 miles) WSW of Caborca, Sonora, Mexico
     1920 km (1190 miles) NW of MEXICO CITY, D.F., Mexico

 27 APR 2005  (117)

     ot  = 00:33:00.06   +/-   0.82              GULF OF CALIFORNIA              
     lat =      30.263   +/-    8.2
     lon =    -114.125   +/-    6.5              MAGNITUDE 4.9 (GS)       
     dep =        10.0  (geophysicist)

     110 km (65 miles) SE of San Felipe, Baja California, Mexico (pop 13,000)
     130 km (80 miles) SSW of Puerto Penasco, Sonora, Mexico (pop 26,000)
     195 km (120 miles) WSW of Caborca, Sonora, Mexico
     1920 km (1200 miles) NW of MEXICO CITY, D.F., Mexico

There is some similarity with this seismic event's ULF precursor   and that of the Sea of Cortez M5.5 earthquake which was on   February 22, 2005.

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

The Full Moon and Associated

Spring Tides

Advisory is Now in Effect!

MT ULF UPDATE: April 27, 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 Wednesday. The ULF and MT activity level was moderate to strong during the past 24 hours. The inferred mean average unclamping level was unchanged during the past 24 hours. The ULF mean average was slightly increased (positive). The MT peak reading was measured at 9.5 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

M3.3 2005/04/27 22:24:49 36.876 -122.127 13.9 14 km ( 9 mi) SW of Santa Cruz, CA

Today, there was a significantly strong ULF burst detected during a micro quake epicentered at Lake Tahoe(Vista), CA. Other regions with detected ULF activity were near Simi Valley and San Jacinto, CA. Also, there was a possible geomagnetic pulse type of a disturbance (21:40:42 UTC) associated with a micro quake epicentered in Central Alaska.

Today's micro seismic swarm (Mt. San Gorgonio) was epicentered near the Mill Creek Branch   of the Southern San Andreas Fault Zone. Here's the latest published graphic, which indicates that crustal stress now building along the   plate boundary north of Los Angeles, is very high.

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

MT ULF UPDATE: April 28, 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 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. The ULF mean average was increased (positive). The MT peak reading was measured at 8.8 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

M3.8 2005/04/28 18:31:20 40.594 -125.580 5.1 111 km ( 69 mi) W of Ferndale, CA
M3.1 2005/04/28 20:27:15 39.125 -118.974 0.0 22 km ( 14 mi) NW of Schurz, NV

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

MT ULF UPDATE: April 29, 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 Friday. The Peak (Crustal) Infrasonic Harmonic Resonant Frequency was measured at 1.96 Hz (-74.87 dBv). 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. The ULF mean average was unchanged. The MT peak reading was measured at 9.2 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

Over the last 24 hours there were two separate periods with strong piezomagnetic activity. Both were detected within a short period of time after the micro quake (M2.8) epicentered SW of Encino, CA. Which is also close to where I detected the ULF precursor (09/04/2001) for the West Hollywood earthquake back on September 9, 2001.

 29-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

MT ULF UPDATE: April 30, 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 1.75 Hz (-73.92 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. The ULF mean average was unchanged. The MT peak reading was measured at 8.8 units of regional lithospheric stress. All daily charts were updated to reflect the latest analysis.

The latest observed change is the detection of three separate periods with Geomagnetic Oscillation. It's inferred to be associated with crustal stress changes now occurring along the Transverse Range in Southern California, at the Plate Boundary.

 30-APR-2005: 24 Hour Geomagnetic and Magneto-Telluric Graph

Scientific Earthquake Prediction is by no means an exact science, and much more work still needs completion before it's out of the experimental stages of development. You can compare this with looking at the Moon through a telescope, and arriving in a spaceship at Trinity Base. We are still looking at it through a focused lens and just beginning to take the step into outer space via satellite detection. My goal is to fill in the gaps down here at earth level. the Mojave segment along the San Andreas fault, the Garlock fault, and the Mojave Desert Block are my favorite subject. From the Gulf of California to Parkfield in Central California is my general zone of exploratory research. Anything outside of this is done for extra credit.

Remember, your monetary contributions provide the necessary resources which allow the graphics, informational updates & narratives provided here to be published in such a timely manner.

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