1892 Laguna Salada earthquake
 San Diego
Los Angeles
San Quintín
 |
|
| Date | 24 February 1892 |
|---|---|
| Origin time | 07:20 UTC |
| Magnitude | 7.1–7.2 Mw (est) |
| Epicenter | 32°44′N 115°30′W / 32.73°N 115.50°WCoordinates: 32°44′N 115°30′W / 32.73°N 115.50°W |
| Type | Oblique-slip |
| Areas affected |
Baja California Southern California |
| Max. intensity | VIII (Severe) |
| Casualties | None |
The 1892 Laguna Salada earthquake occurred at 23:20 Pacific Standard Time on February 23. It had an estimated moment magnitude of 7.1–7.2 and a maximum perceived intensity of VIII (Severe). The shock was centered near the Mexico–United States border and takes its name from a large dry lake bed in Baja California, Mexico. There were no reported casualties, but the event affected the then largely-uninhabited areas of northern Mexico and Southern California.
The Salton Trough is part of the complex plate boundary between the Pacific Plate and the North American Plate where it undergoes a transition from the continental transform of the San Andreas Fault system to the series of short spreading centers of the East Pacific Rise linked by oceanic transforms in the Gulf of California. The southern part of the trough is divided into two by the Sierra Cucapa and Sierra Mayor ranges forming the Mexicali Valley to the east and the Laguna Salada to the west. The western side of these ranges is formed by the Laguna Salada Fault, which forms a possible continuation of the Elsinore Fault Zone of southern California.
The Laguna Salada Fault shows combined normal (down to the southwest) and dextral (right-lateral) movement. Prior to 2010 it showed evidence of recent (probably historical) displacement with a 22 km (14 mi) zone of surface faulting, and 3–4 m (9.8–13.1 ft) of vertical displacement. This is interpreted to be associated with the 1892 earthquake.
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