1994 Northridge earthquake
Earthquake in Los Angeles, California / From Wikipedia, the free encyclopedia
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The 1994 Northridge earthquake was a moment magnitude 6.7 (Mw),[8] blind thrust earthquake that occurred on January 17, 1994, at 4:30:55 a.m. PST in the San Fernando Valley region of the City of Los Angeles. The quake had a duration of approximately 10–20 seconds, and its peak ground acceleration of 1.82 g was the highest ever instrumentally recorded in an urban area in North America.[9][10][11] Shaking was felt as far away as San Diego, Turlock, Las Vegas, Richfield, Phoenix, and Ensenada.[12] The peak ground velocity at the Rinaldi Receiving Station was 183 cm/s (4.1 mph; 6.6 km/h), the fastest ever recorded.[7]
UTC time | 1994-01-17 12:30:55 |
---|---|
ISC event | 189275 |
USGS-ANSS | ComCat |
Local date | January 17, 1994 (1994-01-17) |
Local time | 4:30:55 a.m. PST[1] |
Duration | 10–20 seconds[2] |
Magnitude | 6.7 Mw[3] |
Depth | 11.31 mi (18.20 km) |
Epicenter | 34.213°N 118.537°W / 34.213; -118.537 |
Fault | Northridge Blind Thrust Fault[4] |
Type | Blind thrust |
Areas affected | Greater Los Angeles Area Southern California United States |
Total damage | $13–50 billion[5] (equivalent to $24–93 billion in 2021) |
Max. intensity | MMI IX (Violent)[1] |
Peak acceleration | 1.82 g[6] |
Peak velocity | 183 cm/s[7] |
Casualties | 57 killed > 8,700 injured |
Two 6.0 Mw aftershocks followed, the first about one minute after the initial event and the second approximately 11 hours later, the strongest of several thousand aftershocks in all.[13] The death toll was 57, with more than 9,000 injured.[14][15] In addition, property damage was estimated to be $13–50 billion (equivalent to $24–93 billion in 2021), making it among the costliest natural disasters in U.S. history.[16]