Episode 1 of 1
1857 Fort Tejon Earthquake
- When
- January 9, 1857
- Where
- Central and Southern California
A magnitude 7.9 earthquake ruptured 350 km of the southern San Andreas Fault on January 9, 1857, causing shaking in Central and Southern California.
The earthquake occurred at 8:20 a.m. Pacific time on January 9, 1857. It ruptured the southern part of the San Andreas Fault for about 225 miles between Parkfield and Wrightwood. The event is named after Fort Tejon, though the epicenter was nearly 100 miles from the fort.
Sources
- 1857 Fort Tejon earthquake Wikipedia, revision of 2026-08-01
- Fort Tejon Wikipedia, revision of 2026-09-05
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.