Welcome to the BSL

UC Berkeley Seismological Laboratory
215 McCone Hall #4760
Berkeley CA 94720-4760

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The Berkeley Seismological Laboratory conducts research on earthquake processes and earth structure,
provides timely and accurate earthquake information to a variety of public and private agencies,
and assists in the education of students and the public in earthquake science.

Parkfield is at the northern end of a locked segment of the San Andreas Fault (SAF) that, in 1857, ruptured south from Monarch Peak (MP) in the great 7.8 magnitude Ft. Tejon quake. As a result of nearby earthquakes in 2003 and 2004, tremors developed under Cholame and Monarch Peak. The black dots pinpoint 1250 well-located tremors. The square boxes are 30 kilometers (19 miles) on a side. Color contours give regional shear-stress change at 20 km depth from the Parkfield earthquake (green segment) along the SAF. The thrust-type San Simeon earthquake rupture is represented by the gray rectangle and line with triangles labeled SS. The currently locked Cholame segment is about 63 km long (solid portion of the arrow) and is believed capable of rupturing on its own in a magnitude 7 earthquake. The gray lines within the Cholame box bound the west quadrant, where quasiperiodic episodes predominate. Robert Nadeau, courtesy Science magazine - UC Berkeley Press Release (Read the article in Science)		Seismo Blog Today in Earthquake History: Loma Prieta 1989
		20 Years After Quake, Safety Renovations Continue - From The Daily Cal
		More information on current earthquakes in California...
		Bay Area Earthquake Alliance
		See the earthquake preparedness video for undergraduate students on the UC Berkeley campus. This video was put together by students in a Freshman Seminar given by Prof. Richard Allen and Barbara Romanowicz.

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Last modified: Mon Oct 19 12:08:43 PDT 2009