Swarm of Earthquakes Shakes Imperial Valley

Dozens of small earthquakes up to magnitude 4.5 shook the Imperial County desert Wednesday afternoon, but there were no reports of damage.

Kate Hutton, a staff seismologist at Caltech in Pasadena, called the event "a very typical Imperial Valley swarm."

She said the temblors occurred in the Brawley seismic zone, which runs from the San Andreas Fault on the north to the Imperial Fault on the south. Hutton said additional small quakes could be expected for the next day or two.