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31 May 2003, 01:00 PDT

A mild earthquake located off the coast about 9 miles WSW of Ferndale occurred at 01:00 AM PDT on Saturday morning, May 31. The local magnitude for this earthquake is 3.2 (ML).

30 May 2003, 02:03 PDT

A mild earthquake occurred at 02:03 AM PDT early Friday morning, May 30. This epicenter was located about 6 miles WNW of Madera, CA. The local magnitude for this event is 3.1 (ML).

29 May 2003, 11:33 and 15:52 PDT

A moderate earthquake occurred at 03:52 PM PDT on Thursday afternoon, May 29. This epicenter was located in the State of Nevada about 13 miles ESE of Mina. The local magnitude for the event averaged over the Berkeley network is 4.1 (ML). A mild event of local magnitude 3.8 (ML) occurred in the same area at 11:33 AM on Thursday morning May 29.

28 May 2003, 15:26 PDT

A small earthquake was reported felt in the region E of Union City on Wednesday afternoon, May 28. This event occurred at 03:26 PM PDT and had a local magnitude of 2.6 (ML). The epicenter was located about 3 miles E of Union City.

26 May 2003, 16:13 PDT

A large, deep earthquake occurred at 07:13 AM Tuesday May 27 local time (04:13 PM Monday May 26 PDT) in the Mindanao, Philippines region, about 45 miles SW of Cotabato. The event had a depth of focus of about 560 kilometers (or 350 miles) under the surface of the earth. The body wave magnitude, averaged over the Berkeley Network, is 6.1 (mb), which is decidedly low since, at 105 degrees we are in the Earth's shadow zone and receiving only the lower energy P waves that have been diffracted along the Earth's core. The moment magnitude for the event determined by the USGS NEIC is 6.8 (Mw).

26 May 2003, 14:15 PDT

A mild earthquake which occurred at 02:15 PM PDT on Monday afternoon, May 26. This epicenter was located along the San Andreas Fault W of the Golden Gate, about 8 miles NW of Daly City and 9 miles W of San Francisco City Hall. The local magnitude for this event, averaged over the Berkeley Network, is 3.3 (ML).

26 May 2003, 12:23 PDT

A large earthquake occurred in the Halmahera, Indonesia region, with epicenter located about 150 miles NE of Ternate, Moluccas. The origin time for this event was 04:23 AM Tuesday May 27 local time (12:23 PM Monday May 26 PDT). The surface wave magnitude over the Berkeley Network is 6.9 (Ms). The moment magnitude published by the USGS NEIC is 7.0 (Mw). More information is available from the USGS NEIC.

26 May 2003, 03:38 PDT

A mild earthquake located about 6 miles WNW of Madera and 28 miles NW of Fresno, CA, occurred at 03:38 AM early Monday morning, May 26. This event has a local magnitude across the Berkeley Network of 3.6 (ML).

26 May 2003, 03:01 PDT

A mild earthquake which occurred at 03:01 AM PDT early Monday morning May 26. This epicenter was located along the Calaveras Fault about 13 miles N of Morgan Hill and 12 miles E of San Jose City Hall, CA. The local magnitude for the event, averaged over the Berkeley Network, is 3.8 (ML).

26 May 2003, 02:24 PDT

A large earthquake occurred at 06:24 PM local time (02:24 AM PDT) on Monday, May 26, near the east coast of Honshu, Japan, about 55 miles NE of Sendai. The surface wave magnitude for this event, averaged over the Berkeley Network, is 6.7 (Ms). The moment magnitude, determined by the USGS NEIC, is 7.0 (Mw). Some landslides, but no significant damage, have been reported as of this time due to the earthquake. No tsunami was reported to have been generated by the event. More information is available from the USGS NEIC.

25 May 2003, 00:09 PDT

Several residents in Santa Rosa were awakened by a moderate earthquake at 12:09 AM PDT on Sunday morning, May 25. This epicenter was located about 2 miles NNE of Santa Rosa city center. The local magnitude for this earthquake is 4.3 (ML). The moment magnitude for the event, determined at Berkeley, is 4.2 (Mw).

24 May 2003, 04:20 PDT

A mild earthquake occurred at 04:20 AM PDT on Saturday morning, May 24. This epicenter was located about 13 miles E of Ferndale. The local magnitude for the event is 3.0 (ML).

22 May 2003, 23:48 PDT

A mild earthquake occurred at 04:48 PM PDT on Thursday afternoon, May 22. This epicenter was located about 4 miles WNW of San Benito. The local magnitude for the event is 3.7 (ML).

21 May 2003, 11:44 PDT

A large earthquake occurred at 07:44 PM about 40 miles E of Algiers in Northern Algeria (11:44 AM PDT). The surface wave magnitude, averaged over the Berkeley Network, is 6.8 (Ms). The final moment magnitude determined for the earthquake by the USGS National Earthquake Information Center, is also 6.8 (Mw). Four days following the earthquake, the BBC and NPR radio news report that at least 2,000 people died as a result of the earthquake, and almost 9,000 were injured. The worst damage was reported to have occured east of Algiers in the Bourmerdes region near the quake epicenter. This is the largest earthquake in Algeria since the magnitude 7.1 El Asnam Earthquake that struck October 10, 1980. More information is available from the USGS NEIC.

20 and 21 May 2003, 09:50 and 06:59 PDT

A moderate earthquake occurred at 09:50 AM PDT on Tuesday morning, May 20. This epicenter was located at The Geysers, south of Clear Lake. The local magnitude for this event, averaged over the Berkeley Network, is 3.6 (ML). The moment magnitude for the earthquake, determined at Berkeley, is 4.0 (Mw).

A mild earthquake occurred about 5 miles SE of The Geysers at 06:59 AM on Wednesday morning, May 21. The local magnitude for this event is 3.2 (ML).

20 May 2003, 00:09 PDT

A mild earthquake occurred at 12:09 AM PDT on Tuesday morning, May 20. This epicenter was located off the coast of Northern California about 35 miles WNW of Ferndale. The local magnitude for the event is 3.2 (ML).

03 May 2003, 21:23 PDT

A mild earthquake occurred at 09:23 PM PDT on Saturday night, May 3. This epicenter was located about 4 miles E of The Geysers, CA. The local magnitude for the event, which was recorded at most stations in the Berkeley Network, is 3.5 (ML).