In Northern California, a magnitude 3.9 earthquake struck near Dublin at 7:46 p.m. on Monday, March 18. The quake was centered about 4.6 km west of Dublin, according to USGS. An aftershock measuring 2.9 magnitude followed in the same area at 9:46 p.m., reinforcing the seismic activity in the region.

Moderate shaking was reported with a magnitude 3.9 earthquake near Dublin, Calif. Residents in San Francisco, Fremont and Richmond reported weak shaking.

A magnitude 3.9 earthquake was reported Sunday night in Los Angeles County, centered around 6 miles northwest of Malibu. It happened at 8:17 p.m., the U.S. Geological Survey reported on its website. No damage was immediately reported. Quakes generally don’t cause damage below 4.0, according to the USGS.