WIRED Staff
Science

Slideshow: Quake Response in Two Shakes

A new statewide monitoring network will help seismologists pinpoint earthquakes in California and speed response times once they occur. By Kendra Mayfield.
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The same San Juan Bautista earthquake is represented in terms of acceleration outward from the epicenter.USGS/UCB/CDMG

See related story: Quake Response in Two Shakes

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The same earthquake is shown here as a peak velocity map in centimeters per second. You can see that the velocity decreases in proportion to the distance outward from the epicenter.

USGS/UCB/CDMG
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At 4:59 a.m. on April 23, 2002 PDT a magnitude 3.6 earthquake struck approximately 4 miles west-north-west of San Juan Bautista, CA. This map shows the intensity of the shock waves outward from the epicenter with a color gradient.

USGS/UCB/CDMG