BOMBAY BEACH, Calif. (AP) - There have been dozens of
aftershocks in Southern California following an early Tuesday morning
The moderate quake struck about 90 miles east of San Diego, just south of the small town of Bombay Beach, on the eastern shore of the Salton Sea.
The tremor was the largest in a swarm of earthquakes that have rattled the area since the weekend. More than 40 small quakes have been detected, most under magnitude-3.
Scientists are keeping close watch on the increased earthquake activity because it is near a section of the San Andreas Fault that has not popped loose in more than 300 years.
A rupture on the southern San Andreas could set off the "Big One" that would devastate a large swath of Southern California.
Last year, scientists estimated that a magnitude-7.8 earthquake on the southern San Andreas could cause 1,800 deaths and $200 billion in damages.