The earthquake was felt over a wide area from
Los Angeles and
San Bernardino in the north to
San Quintin in the south. The area in which the perceived intensity of shaking reached VIII (
Severe) or more was centered on the mapped fault rupture. At least of the Laguna Salada and Cañon Rojo faults ruptured during the earthquake. The section of the Laguna Salada Fault involved had an oblique-slip mechanism while the Cañon Rojo Fault corresponded to normal-faulting. Based on the extent of rupture and coseismic slip, at for right-lateral and for normal, the obtained moment magnitude was 7.1. The rupture may have been longer than thought; possibly propagating further north in a region dominated by sand dunes while the southern rupture end may have extended . Masonry walls were cracked in several buildings there, as well as the outlying communities of
Otay and
Jamul. At the abandoned Carrizo Creek Stage Station, in what is now
Anza-Borrego Desert State Park in eastern San Diego county, poorly built masonry was damaged and all adobe buildings were destroyed. At Hook Ranch and Laguna Station the shaking was strong enough to throw people off their feet and at Dulzura Canyon and McCain Valley the ground was seen to move in waves. There were rockfalls at Bratton Valley, Tierra Blanca Canyon, Storm Canyon and Whale Peak and landslides at Dulzura Canyon and Devil's Canyon.
Aftershocks At
Campo, California 155 aftershocks were felt in the first 12 hours after the mainshock and continued every few days for the next two months. ==Other events==