Swarms of earthquakes continue to rattle the Salton Sea area in Southern California, with more than a dozen sizable quakes since midnight, the U.S. Geological Survey reported Thursday.
Most of the tremors are below 3.0 magnitude, but a few earthquakes registering over 4.5 magnitude have been recorded, the USGS reports. The agency had recorded at least 240 quakes by Wednesday night.
“One of the largest swarms we have had in the Imperial Valley — and it is historically the most active swarms in SoCal,” seismologist Lucy Jones wrote on Twitter.
The quake swarms “are located in an area of diffuse seismic activity between the San Andreas fault in the north and the Imperial fault to the south.,” the USGS says. Previous swarms happened in 1991 and 2012.
