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December 2004 Commentary

Weekly Maps | Earthquake Commentary | Events of Interest | SeismoCams

27 December, 02:36 PST

A moderate earthquake occurred at 02:36 AM. This epicenter was located about 6 miles SE of The Geysers, CA. The moment magnitude for the event is Mw=4.3.

26 December, 13:13 PST

A mild earthquake occurred at 01:13 PM. This event was located about 11 miles SE of Quincy, CA. The local magnitude is ML=3.8.

25 December, 19:56 PST

A mild earthquake occurred at 07:56 PM. This epicenter was located about 25 miles E of Lee Vining, CA. The local magnitude is Mw=3.9.

25 December, 16:58 PST

A great earthquake occurred at 04:58 PM. This epicenter was located about 8,750 miles NW of Berkeley in the region off the west coast of Northern Sumatra, Indonesia. The moment magnitude for this event, determined by Harvard, is Mw=9.0. This earthquake generated a large tsunami that engulfed the Indian Ocean, and even flowed onto the coasts of eastern Africa. In the latest accounting by the NEIC (2/23/2005), the earthquake and tsunami left 283,100 fatalities in its wake, 14,100 others are still reported missing, and 1,126,900 people were displaced within 10 countries in South Asia and East Africa. The highest intensity reported for the earthquake was (IX) at Banda Aceh, Northern Sumatra, which experienced severe damage from both the earthquake and the tsunami. The U.S. Geological Survey's NEIC has maps and much more information of interest about this earthquake.

14 December, 20:16 PST

A mild earthquake occurred at 08:16 PM. This epicenter was located about 11 miles SSE of Tres Pinos, CA. The moment magnitude is Mw=3.80.

12 December, 01:13 PST

A moderate earthquake occurred at 01:38 AM. This epicenter was located about 17 miles E of Eureka, CA. The moment magnitude is Mw=4.3.

4 December, 17:48 PST

A moderate earthquake occurred at 05:48 PM. This event was located about 19 miles E of Eureka, CA. The moment magnitude is Mw=4.3.


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Berkeley Seismological Lab
215 McCone Hall, UC Berkeley
Berkeley CA 94720-4760
www@seismo.berkeley.edu

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Last modified: Fri Oct 23 16:04:31 PDT 2009