Berkeley struck by 9 earthquakes in three days
See a correction at the end of this post
The Berkeley area has been hit by nine earthquakes in the last three days, all probably caused by movement on the San Francisco Bay Area's dangerous Hayward fault.
The quake series began Thursday with a 4.0 temblor. It was followed by 15 aftershocks, the largest registering 3.8.
Residents reported feeling at least three of the temblors. The first quake was large enough to cause some items to fall from shelves in homes near the Berkeley epicenter, and some plaster fell from the ceiling of a business in Oakland,
The Hayward fault runs along the eastern side of San Francisco Bay and has long been considered one of the most dangerous faults in California. Although it gets less attention than the San Andreas fault, which that crosses the city of San Francisco (and extends well into Southern California), the Hayward fault is near population centers in Fremont, Oakland and dozens of other cities.
Scientists have said a quake on the Hayward fault is overdue.
-- Shelby Grad and Rong-Gong Lin II
[Correction: An earlier version of this post incorrectly stated there had been 16 earthquakes in the Berkeley area. That number includes quakes from other parts of the region. There have been nine quakes in Berkeley.]
Image: Map shows the Hayward fault in red. Credit: U.S. Geological Survey