Earth ChangesThe next ‘Big One’ on the San Andreas fault might not be the earthquake we expect, researchers say Posted on August 13, 2025 by Administrator What could the next mega-earthquake on California’s notorious San Andreas fault look like? Would it be a repeat of 1857, when an earthquake estimated at magnitude 7.7 to 7.9 ruptured the fault from Monterey County all the way through Los Angeles County? Would it be more akin to the great 1906 San Francisco earthquake, which began just offshore of the city and ruptured in two directions, toward Humboldt County and Santa Cruz County? Don’t bet on an identical sequel.
