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
Magnitude of the earthquake and aftershocks
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]
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]
^ ab"Historic Earthquakes". Archived from the original on December 1, 2016. Retrieved April 13, 2016.
^"Introduction". Retrieved April 13, 2016.
^ANSS: Northridge 1994 .
^"USGS Northridge Earthquake 10th Anniversary". Archived from the original on December 2, 2003. Retrieved April 13, 2016.
^"1994 Quake Still Fresh in Los Angeles Minds". Los Angeles Daily News. January 11, 2014. Retrieved November 11, 2021.
^Cite error: The named reference Yegian was invoked but never defined (see the help page).
^ ab"ShakeMap Scientific Background". Archived from the original on June 23, 2011. Retrieved August 28, 2017.
^ANSS. "Northridge 1994: 6.7 – 1km NNW of Reseda, CA". Comprehensive Catalog. U.S. Geological Survey.
^Luco, Nicolas (2019). "Seismic design and hazard maps: Before and after". Structure: 28–30.
^USGS Earthquake Information for 1994 "Significant Earthquakes of the World 1994" Archived 2011-07-14 at the Wayback Machine
^Northridge EarthquakeArchived 2004-09-04 at the Wayback Machine Southern California Earthquake Data Center. Retrieved October 6, 2006.
^"M 6.7 - Northridge - Impact". United States Geological Survey. Retrieved November 11, 2021.
^Douglas Dreger. "The Large Aftershocks of the Northridge Earthquake and their Relationship to Mainshock Slip and Fault Zone Complexity". Retrieved November 25, 2012.
^Cite error: The named reference latimes95 was invoked but never defined (see the help page).
^Miller, Devon (January 17, 2021). "Remembering The Northridge Earthquake 27 Years Later". The Valley Post. Archived from the original on May 25, 2021. Retrieved January 17, 2021.
^"1994 Quake Still Fresh in Los Angeles Minds". Los Angeles Daily News. January 11, 2014. Retrieved July 9, 2017.
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