Figure 1. Location of magnitude 5 and greater earthquakes (stars, 1937 – present, N=51) in southern California. Notice how the Julian earthquake (red star) occurred in a region that historically did not host large earthquakes. Highlighted are the Elsinore (green), Laguna Salada (brown), and Whittier (light blue) faults. The San Andreas fault runs on the east side of the Salton Sea. The San Jacinto fault is sandwiched between the San Andreas and Elsinore faults. Credit: Kilb et al., 2025, CC BY-NC-ND 4.0

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Figure 1. Location of magnitude 5 and greater earthquakes (stars, 1937 - present, N=51) in southern California. Notice how the Julian earthquake (red star) occurred in a region that historically did not host large earthquakes. Highlighted are the Elsinore (green), Laguna Salada (brown), and Whittier (light blue) faults. The San Andreas fault runs on the east side of the Salton Sea. The San Jacinto fault is sandwiched between the San Andreas and Elsinore faults. Credit: Kilb et al., 2025, CC BY-NC-ND 4.0

Figure 1. Location of magnitude 5 and greater earthquakes (stars, 1937 – present, N=51) in southern California. Notice how the Julian earthquake (red star) occurred in a region that historically did not host large earthquakes. Highlighted are the Elsinore (green), Laguna Salada (brown), and Whittier (light blue) faults. The San Andreas fault runs on the east side of the Salton Sea. The San Jacinto fault is sandwiched between the San Andreas and Elsinore faults. Credit: Kilb et al., 2025, CC BY-NC-ND 4.0

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