A 4.2 earthquake centered in San Bernardino hit Southern California, causing light to shake across the Inland Empire.
Riverside, Fontana, Rialto, Rancho Cucamonga, Moreno Valley, and Redlands experienced light shaking like a heavy truck striking a building.
Colton, near the epicenter, experienced shaking, but authorities reported no calls for aid. Weaker shaking reached Los Angeles, Long Beach, and Orange County.
The quake originated near the San Jacinto fault, raising concerns due to its location through active areas like San Bernardino, Colton, Moreno Valley, and Riverside.
The Inland Empire's seismic vulnerability is highlighted by a lack of retrofitting in cities, including Riverside, Pomona, and San Bernardino.
Seismologist Lucy Jones noted the quake's depth (over nine miles) and its potential correlation to a previous quake on Jan. 5, emphasizing the region's seismic activity.