A magnitude 3.2 earthquake rattled communities across Southern California on Monday night.
Although magnitude measures the size of an earthquake, depth can also influence how strongly shaking is felt above ground. According to the USGS, shallow earthquakes occur at depths of up to 43.5 miles and generally produce stronger shaking than deep ones because their seismic waves only have to travel a short distance to reach the surface, allowing them to retain more of their energy.
Monday's earthquake originated at a relatively shallow depth of about 7.7 miles. As of Tuesday morning, the USGS had received only about 130 reports of weak to light shaking from residents as far north as Santa Clarita in Los Angeles County and as far south as Huntington Beach in Orange County.
Several other earthquakes were recorded across the state on Monday. Shortly after 1:20 p.m., a magnitude 2.5 quake hit just off the coast of Santa Cruz Island at a depth of about 5.8 miles. Another quake was reported further north shortly before 7:15 p.m., striking near Avenal at a depth of 5.6 miles.
The USGS advises people to follow the "Drop, Cover, and Hold On" method during an earthquake. If shaking is felt indoors, residents should steer clear of windows, fireplaces, and heavy furniture. They should also avoid the kitchen and not rush downstairs or outside while the shaking continues.
