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A pair of modest earthquakes rattled Southern California on Saturday morning, with epicenters in Ontario. The earthquakes, of magnitudes 3.5 and 3.9, occurred within about a half hour of each other.
The earliest known earthquake in the U.S. state of California was documented in 1769 by the Spanish explorers and Catholic missionaries of the Portolá expedition as they traveled northward from San Diego along the Santa Ana River near the present site of Los Angeles. Ship captains and other explorers also documented earthquakes.
At 4:57 a.m. local time (11:57 UTC) on June 28, 1992, a magnitude 7.3 earthquake awoke much of Southern California. Though it turned out it was not the so-called "Big One" as many people would think, it was still a very strong earthquake. The shaking lasted for two to three minutes.
A magnitude 4.0 earthquake rattled parts of Southern California Sunday morning. ... the Ontario International Airport in the last month. Sunday's 3:51 a.m. earthquake was the fifth of magnitude 3 ...
A trio of Southern California earthquakes have struck in the area of Newport Beach and Costa Mesa in the last two days, with a pair rumbling late Thursday afternoon.
The 1994 Northridge earthquake affected the Los Angeles area of California on January 17, 1994, at 04:30:55 PST. The epicenter of the moment magnitude 6.7 ( M w ) blind thrust earthquake was beneath the San Fernando Valley . [ 3 ]
A Magnitude 3.6 earthquake struck in Southern California on Sept. 16, 2024, according to the United States Geological Survey, marking the second temblor to hit the region in less than five days.
A magnitude 4.1 earthquake was reported offshore in California on the morning of New Year’s day, according to the US Geological Survey. The seismic event occurred at 8:27 am local time 11 miles ...