May 16, 1910: Here’s an interesting problem – how did newspapers report an earthquake 100 years ago? The Times gathered brief accounts over a wide area, from San Diego and Santa Catalina Island to Riverside, Banning, Mt. Wilson and Elsinore. According to the Southern California Earthquake Data Center, this was an estimated magnitude 6 quake on the Elsinore fault about 15 miles south of Riverside.