• M5.2 San Diego earthquake linked to Elsinore Fault renews concerns over major seismic risk in Southern California

    M5.2 earthquake that struck San Diego County near Julian on April 14, 2025, occurred along the Elsinore Fault Zone, a major strike-slip fault in Southern California capable of producing earthquakes up to magnitude 7.8. The fault runs near densely populated areas including Los Angeles, Long Beach, and Riverside, and its long period of limited activity may indicate an increased potential for a significant seismic event, according to recent research.