GROUND MOTION MAPS

Map of peak ground acceleration in %g.	Map of peak ground velocity in cm/sec.

The epicenter of the earthquake is shown as a black star, while the black line indicates the length of the faulting, as determined by the analysis of seismograms. UC Berkeley is identified by the black polygon. Warmer colors indicate higher levels of ground shaking. According to these maps, the campus would experience peak accelerations of ~10 %g and and velocities of ~30 cm/s. At the station BRK, which is located in Haviland Hall, we observed 32 cm/s peak ground velocity (PGV) and 8%g peak ground acceleration (PGA). At Cal Memorial Stadium, a PGV of 33 cm/s and PGA of 9%g was seen. Out at the Richmond Field Station, our instruments saw 21 cm/s PGV and 4%g PGA.

If you want to see a larger version of either map, click on the image. Click here to see the seismicity map on the same scale. If you want to see a movie of the ground motion, click here.

PLEASE NOTE: These maps do not include the effects of near-surface geology. So, for example, the effect of soft soils near the bay is not apparent. The addition of surface geology will tend to amplify these motions.

These maps will be updated as more information becomes available.