Residents in the Riverside County community of Glen Avon may be feeling a bit rattled with the recent slew of small earthquakes in the area, but the swarm of temblors is quite common, one local seismologist says.
Data from Southern California Earthquake Data Center at Caltech shows hundreds of small quakes have been detected in the Glen Avon area in the past few days, but only two measured above magnitude 3.0. The residential area is part of the city of Jurupa Valley, northwest of the city of Riverside.
The strongest earthquake, measured at magnitude 3.3, occurred around 4:36 p.m. Sunday, about 2 1/2 miles northwest of Glen Avon, according to the U.S. Geological Survey.
Earlier in the day, about 1:05 p.m., a magnitude 3.4 quake struck outside the Glen Avon swarm area – instead centered about 27 miles to the southeast, in a remote area between Hemet and Moreno Valley.
In a tweet, former USGS seismologist Lucy Jones said the seismic activity near Glen Avon is part of “the Fontana trend” in an area that’s a “perennial hotspot” for small temblors that are often in clusters.
Jones called the events “ordinary, common California quakes.”