Special Reports
Regional Location:

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Greenwich Mean Date:
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BOMBAY BEACH, CALIFORNIA

M4.1 (SCSN)

01/11/13
20:43:14
33.317N
115.700W
5.5 km (3.4 miles)

Series of tremors shakes the Salton Sea, California

Seismo-Watch More Special Earthquake Reports
Previous Bombay Beach earthquake report
Page 2

November 13, 2001

BOMBAY BEACH, CALIFORNIA - This report updates an earlier bulletin with more information and new data.

The earthquake swarm along the eastern shore of the Salton Sea near Bombay Beach, intensified during the morning and early afternoon hours, now producing a total of 46 quakes measuring M1.0 or stronger, including seven M3s and one in the M4 range.

The swarm, which according to the Southern California Seismic Network (SCSN), began at about 6 a.m. this morning and pulsed and relaxed at verious times, first at the 8 o'clock hour and again during the 11 o'oclock hour. Then at 12:43 p.m., a moderate M4.1 temblor struck (see data avove), causing the swarm to insensify and sustain a pace of 11-12 quake per hour between 1 - 3 o'clock hours. The swarm is onpoing at the writing of this report.

Subscribers to the Seismo-Watch EQ Flash! Alert Bulletins received a notification of the earthquake within minutes of the quake being reported (See a copy of the Alert Bulletin). You should subscribe to the service too! It's FREE and Fast!
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The tectonic action was centered about three miles southeast of Bombay Beach and 11 miles northwest of Obsidian Buttes in the shallow waters of the eastern Salton Sea, (See a Topozone topo map, see a MapQuest street map).

The focal depth for the swarm is relatively shallow, ranging between 2-6 km deep.

Felt Reports
Early reports indicate most people at Bombay Beach felt the M3+ temblors. The first two M3s during the 8 o'clock hour caught most people's attention, feeling like soft rumbles of the ground. The third was a M3.4 at 8:43 a.m. and people said it shook with a swift, hard jolt, then was gone.

Continued on Page 2

Report update: 5:02:13 PM, Tuesday, November 13, 2001
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