SAN RAMON, Calif. – A pair of moderate earthquakes struck near San Ramon on Sunday morning, briefly rattling parts of the East Bay and reminding residents of the region’s seismic activity. The strongest, a magnitude 3.7 quake, hit about 4 kilometers southeast of San Ramon at roughly 9:39 a.m. local time, followed minutes later by another quake of similar magnitude, according to the U.S. Geological Survey (USGS).
According to the USGS, the initial 3.7-magnitude event originated at a depth of about 8.7 kilometers, followed by smaller tremors measuring 3.0 and 2.9 in the same area. The quakes were centered near the Calaveras Fault, one of several active fault lines running beneath the East Bay.
Light shaking was reported in nearby communities including Dublin, Danville, Pleasanton, and as far south as San Jose. No damage or injuries have been reported, but BART officials said trains were briefly slowed for safety inspections.
Residents are reminded to secure heavy items, review emergency kits, and know how to “Drop, Cover, and Hold On” during shaking.
Authorities say aftershocks are possible through the evening, and monitoring will continue across the region.
