An earthquake with a Modified Mercalli intensity of five was felt on 26 December 1775 by a Spanish colonial expedition led by Juan Bautista de Anza in present-day Riverside County (southeastern California), at the southeastern end of the Cahuilla Valley, near the San Jacinto fault system (Figure 1). After the well-documented earthquakes felt in the Los Angeles basin during the Gaspar de Portolá expedition 28 July to 3 August 1769 (Bancroft 1884; for a summary see Ellsworth 1990; Kovach 2004), this is the second-earliest documented event in the earthquake history of southern California. The...
Research Article|November 01, 2008
Southern California Earthquake during the 1775 Anza Expedition
- Share Icon Share
- Search Site
Max Suter; Southern California Earthquake during the 1775 Anza Expedition. Seismological Research Letters ; 79 (6): 877–878. doi: https://doi.org/10.1785/gssrl.79.6.877
Download citation file:
Latitude & Longitude