2008 Chino Hills earthquake

None May 2025 October 2024 2008 Chino Hills earthquake 2008-07-29 18:42:15 2008 7 29 11:42:15 a.m. PDT 12951737 ci14383980 USA California California 32.72 -117.16 San Diego 100 right Green pog.svg California 34.05 -118.25 Los Angeles 100 left Green pog.svg California 36.18 -115.14 Las Vegas 100 left Green pog.svg California 33.953 -117.761 Bullseye1.png 40 yes 290 right 5.4 Mw 15.5 km mi us on 33.953 N 117.761 W region:US inline, title Limited Oblique-slip VIhttps://earthquake.usgs.gov/earthquakes/eventpage/ci14383980/impact M 5.4 – 5km S of Chino Hills, CA – Impact United States Geological Survey 0.44 g ~100 Greater Los AngelesSouthern CaliforniaUnited States 8 injured 38 cm/s File:Quake yorba linda.jpg The earthquake knocked down merchandise inside buildings such as this Yorba Linda grocery store. Yorba Linda Fault The 2008 Chino Hills earthquake occurred at 11:42:15 am PDT (18:42:15 UTC) on July 29 in Southern California, United States. The epicenter of the magnitude 5.4 earthquake was in Chino Hills, c. 28 mi km us east-southeast of downtown Los Angeles. Movement on an oblique-slip fault resulted in a maximum Mercalli intensity of VI (Strong). Though there were no deaths, eight people were injured, and it caused considerable damage in numerous structures throughout the area and caused some amusement park facilities to shut down their rides. The earthquake led to increased discussion regarding the possibility of a stronger earthquake in the future. Earthquake The Chino Hills earthquake was caused by oblique-slip faulting, with components of both thrust and sinistral strike-slip displacement. Preliminary reports cited the Whittier Fault as the active cause, but the quake was later determined to have been generated by the "Yorba Linda trend," as identified by Caltech seismologist Egill Hauksson.http://sciencedude.freedomblogging.com/2008/07/31/little-known-yorba-linda-fault-caused-tuesdays-quake/ Little known Yorba Linda fault caused Tuesday's quake Robbins, Gary July 31, 2007 The Orange County Register August 1, 2008 https://web.archive.org/web/20080828181345/http://sciencedude.freedomblogging.com/2008/07/31/little-known-yorba-linda-fault-caused-tuesdays-quake/ August 28, 2008 dead Its epicenter was within 3 mi km us of Chino Hills and its hypocenter was c. 15.5 km mi us deep. Initial estimations of the moderate main shock reported it as magnitude 5.8, but this was later revised to magnitude 5.4.https://earthquake.usgs.gov/eqcenter/eqinthenews/2008/ci14383980/ Magnitude 5.5 – Greater Los Angeles Area, California July 29, 2008 United States Geological Survey September 1, 2010 https://web.archive.org/web/20091104163344/http://earthquake.usgs.gov/eqcenter/eqinthenews/2008/ci14383980/ November 4, 2009 dead The main shock was reportedly felt as far south as San Diego, and Tijuana, Mexico,http://news.sky.com/skynews/Home/World-News/Earthquake-Of-54-Magnitude-Shakes-Southern-California-Although-No-Injuries-Are-Reported/Article/200807415060001 What's Making Judge Judy Quake? July 30, 2008 Sky News July 30, 2008 https://web.archive.org/web/20081216041006/http://news.sky.com/skynews/Home/World-News/Earthquake-Of-54-Magnitude-Shakes-Southern-California-Although-No-Injuries-Are-Reported/Article/200807415060001 December 16, 2008 dead and as far east as Las Vegas, Nevada.https://www.latimes.com/news/local/la-me-la-quake30-2008jul30,0,6284507.story Minor damage from 5.4 quake shows California has learned its lessons July 29, 2008 Rubin, Joel Pierson, David Landsberg, Mitchell July 29, 2008 Los Angeles Times https://web.archive.org/web/20080730205114/http://www.latimes.com/news/local/la-me-la-quake30-2008jul30%2C0%2C6284507.story July 30, 2008 live It was the strongest earthquake to occur in the greater Los Angeles area since the 1994 Northridge earthquake.https://www.nytimes.com/2008/07/30/us/30quake.html Earthquake Rattles Southern California The New York Times Steinhauer, Jennifer July 29, 2008 July 29, 2008 https://web.archive.org/web/20110512043234/http://www.nytimes.com/2008/07/30/us/30quake.html?hp May 12, 2011 live As reported by The Orange County Register, three microearthquakes, all less than magnitude 3.0, occurred in Anaheim Hills, 7 mi km us southwest of Chino Hills, two months before the Chino Hills earthquake.http://sciencedude.freedomblogging.com/2008/05/24/third-microquake-shakes-anaheim-hills/ Third microquake shakes Anaheim Hills Robbins, Gary The Orange County Register May 24, 2008 July 29, 2008 https://web.archive.org/web/20080917090613/http://sciencedude.freedomblogging.com/2008/05/24/third-microquake-shakes-anaheim-hills/ September 17, 2008 dead There was an unusually low amount of seismic activity in Southern California in the week prior to the quake. Between July 20 and 26, 2008, there were no earthquakes in Southern California exceeding magnitude 3.0, thus there was speculation that the wane in seismic activity was a precursor to a possible larger event.http://sciencedude.freedomblogging.com/southern-california-quake-activity-continues-odd-down-turn/ Southern California Quake Activity Continues Odd Down Turn Robbins, Gary The Orange County Register July 29, 2008 https://web.archive.org/web/20080828113149/http://sciencedude.freedomblogging.com/southern-california-quake-activity-continues-odd-down-turn/ August 28, 2008 dead Impact thumb|USGS shakemap for the earthquake The Chino Hills earthquake caused no deaths or significant damage due to the physical location of its epicenter.https://www.cbc.ca/news/world/strong-earthquake-jolts-southern-california-1.727776 Strong Earthquake Hits Southern California CBC News July 29, 2008 July 29, 2008 https://web.archive.org/web/20080730115302/https://www.cbc.ca/news/world/strong-earthquake-jolts-southern-california-1.727776 July 30, 2008 live Most of the infrastructure in the Chino Hills area is relatively new and well suited to withstand a large quake.http://www.cnn.com/2008/US/07/30/earthquake.ca/index.html Tougher codes kept quake damage down July 30, 2008 CNN July 30, 2008 https://web.archive.org/web/20080805012237/http://www.cnn.com/2008/US/07/30/earthquake.ca/index.html August 5, 2008Strict building codes credited after Calif. quake Flaccus, Gillian July 30, 2008 Associated Press Unlike previous earthquakes in the region—such as the 1994 Northridge earthquake and the 1987 Whittier Narrows earthquake, which caused serious structural damage and fatalities—this quake caused only minor damage. However, the high volume of telephone use following the shock overloaded provider capacity and disrupted service into the afternoon.https://www.latimes.com/news/local/la-me-phones30-2008jul30,0,854202.story Post-quake callers overload phone systems Colker David July 30, 2008 Los Angeles Times August 2, 2008 https://web.archive.org/web/20080805045645/http://www.latimes.com/news/local/la-me-phones30-2008jul30%2C0%2C854202.story August 5, 2008 live Amusement rides at Disneyland, Six Flags Magic Mountain, Universal Studios Hollywood and Knott's Berry Farm were evacuated and temporarily shut down.http://www.latimes.com/news/local/la-me-assessmentquake30-2008jul30,0,4614179.story What's closed, delayed after the quake July 29, 2008 Los Angeles Times July 30, 2008 https://web.archive.org/web/20080805043833/http://www.latimes.com/news/local/la-me-assessmentquake30-2008jul30%2C0%2C4614179.story August 5, 2008 dead California State University, Fullerton suffered some damage in its older, inadequately engineered buildings. In Orange, the Chapman University School of Law was evacuated after a water pipe was ruptured.http://collegelife.freedomblogging.com/2008/07/29/college-earthquake-updates/ College earthquake updates Fisher, Marla Jo The Orange County Register July 29, 2008 August 21, 2008 https://web.archive.org/web/20080828181315/http://collegelife.freedomblogging.com/2008/07/29/college-earthquake-updates/ August 28, 2008 dead Pipes on a Macy's department store in Westfield Topanga ruptured during the tremor flooding the store which closed for a couple of days in order to be repaired. A light fixture damaged by the shock started a small fire in the Westfield MainPlace Mall in Santa Ana; since the fire was in an empty movie theater, nobody was harmed. thumb|Earthquake damage at South Coast Plaza in Costa Mesa A gap was reported on California State Route 91 near Anaheim Hills, c. 7 mi km southwest of the epicenter, but the California Department of Transportation concluded that the gap did not pose a danger.http://www.ocregister.com/articles/font-shaking-2108278 O.C. Quake roundup: Disney rides down, trains disrupted, small landslide reported July 29, 2008 Irving, Doug The Orange County Register July 29, 2008 https://web.archive.org/web/20080730115402/http://www.ocregister.com/articles/font-shaking-2108278 July 30, 2008 live A minor landslide near the freeway caused some traffic congestion, but structural damage was reported. California Department of Transportation replaced an expansion joint on an Interstate 5 truck overpass at the El Toro Y Interchange. The roof of Placentia's public library nearly collapsed; afterwards, the building was closed for repairs. Electrical outages were reported in Chino, Chino Hills, Diamond Bar and Pomona.http://www.chicagotribune.com/news/nationworld/chi-los-angeles-earthquake-080729-ht,0,5977819.story 5.4 earthquake strikes Los Angeles July 29, 2008 Chicago Tribune August 15, 2008 https://web.archive.org/web/20080810204449/http://www.chicagotribune.com/news/nationworld/chi-los-angeles-earthquake-080729-ht%2C0%2C5977819.story August 10, 2008 livehttps://abc7.com/archive/6294236/ 5.4 quake strikes near Los Angeles ABC News United States July 29, 2008 July 29, 2008 https://web.archive.org/web/20081216041333/http://abclocal.go.com/kabc/story?section=news%2Flocal&id=6294236 December 16, 2008 live Over 2,000 people lost power after a fire broke out at a La Habra power station, but electricity was restored that afternoon. Los Angeles International Airport reported a ground radar system outage along with a broken water heater, causing flooding in the checked luggage preparation area of Terminal 7.http://www.cnn.com/2008/US/07/29/earthquake.ca/index.html Expert: L.A.'s 5.4 quake 'small sample' of one to come CNN July 30, 2008 August 21, 2008 https://web.archive.org/web/20080805012212/http://www.cnn.com/2008/US/07/29/earthquake.ca/index.html August 5, 2008 Minor injuries from falling ceiling tiles were reported at a medical clinic in Brea.http://www.ocregister.com/articles/font-shaking-2108278 O.C. QUAKE ROUNDUP: Disney rides down, trains disrupted, small landslide reported July 29, 2008 Irving Doug The Orange County Register July 29, 2008 https://web.archive.org/web/20080730115402/http://www.ocregister.com/articles/font-shaking-2108278 July 30, 2008 live The earthquake affected candidates who were in the first day of the three-day California Bar Exam in nearby Ontario and Los Angeles.https://www.chronicle.com/article/rattled-by-quake-during-california-bar-exam-some-test-takers-cry-foul/ April 19, 2022 chronicle.com Rattled by Quake During California Bar Exam, Some Test-Takers Cry Foul August 8, 2008 The State Bar ultimately did not count that portion of the test for or against any attorney candidates. Aftershocks thumb|Damage in a shopping center Approximately 100 minor aftershocks and one presumed foreshock were reported within two days after the earthquake,https://www.latimes.com/archives/la-xpm-2008-jul-31-me-quake31-story.html Will Chino Hills earthquake shake L.A. out of complacency? Pierson, David July 31, 2008 Los Angeles Times August 2, 2008 See also: Southern Californians Urged to Join Largest Earthquake Drill in U.S. History https://www.usgs.gov/newsroom/article.asp?ID=1983 July 30, 2008 United States Geological Survey July 30, 2008 https://web.archive.org/web/20080805095604/http://www.usgs.gov/newsroom/article.asp?ID=1983 August 5, 2008 live 27 of which occurred within an hour after the earthquake.https://www.latimes.com/news/local/la-sci-quake30-2008jul30,0,7281322.story Quake originated about eight miles under Chino Hills Maugh II Thomas July 30, 2008 Los Angeles Times July 30, 2008 https://web.archive.org/web/20080805050148/http://www.latimes.com/news/local/la-sci-quake30-2008jul30%2C0%2C7281322.story August 5, 2008 live Four aftershocks of at least magnitude 3.0 were reported—the first, nine minutes following the initial earthquake, was the largest at magnitude 3.8; and two others, occurring over two hours later, were recorded at magnitude 3.6.https://earthquake.usgs.gov/eqcenter/recenteqsus/Maps/US2/33.35.-119.-117_eqs.php Earthquake List for Map Centered at 34°N, 118°W United States Geological Survey July 30, 2008 https://web.archive.org/web/20080709020721/http://earthquake.usgs.gov/eqcenter/recenteqsus/Maps/US2/33.35.-119.-117_eqs.php July 9, 2008 dead Twenty-eight aftershocks of at least 2.0 were reported. Response There was speculation that the Chino Hills earthquake may have been a foreshock to a larger earthquake.http://uk.reuters.com/article/uk-quake-losangeles-idUKN2935724120080730?sp=true https://web.archive.org/web/20160306152005/http://uk.reuters.com/article/uk-quake-losangeles-idUKN2935724120080730?sp=true dead March 6, 2016 Earthquake jolts lucky Los Angeles Whitcomb Dan July 30, 2008 Reuters July 30, 2008 See also: Experts see quake as 'teachable moment' Becerrea, Hector Pierson, David July 31, 2008 Los Angeles Times https://www.latimes.com/archives/la-xpm-2008-jul-31-me-quake31-story.html August 21, 2008 The Southern California Seismic Network's Aftershock Probability Report, produced minutes after the event, stated that "Most likely, the recent mainshock will be the largest in the sequence. However, there is a small chance, c. 5–10%, of an earthquake equal to or larger than this mainshock in the next 7 days."http://www.scsn.org/forecast/14383980.html Aftershock Probability Report July 29, 2008 Southern California Seismic Network July 30, 2008 https://web.archive.org/web/20080804235332/http://www.scsn.org/forecast/14383980.html August 4, 2008 dead Geologists at the United States Geological Survey and Uniform California Earthquake Rupture Forecast suggest that an earthquake with a magnitude of 6.7 or larger will almost definitely occur somewhere in the state within the next 30 years.https://www.sciencedaily.com/releases/2008/04/080414203459.htm California Has More Than 99% Chance of a Big Earthquake WIthin 30 Years, Report Shows April 15, 2008 ScienceDaily July 30, 2008 https://web.archive.org/web/20080805013933/https://www.sciencedaily.com/releases/2008/04/080414203459.htm August 5, 2008 live See also: Forecasting California's Earthquakes—What Can We Expect in the Next 30 Years? Field, Edward Milner, Kevin 2007 Working Group on California Earthquake Probabilities https://pubs.usgs.gov/fs/2008/3027/fs2008-3027.pdf 1.0 2008 USGS Fact Sheet 2008-3027 United States Geological Survey July 30, 2008 then-California Governor Arnold Schwarzenegger said: "This earthquake reminds us to be prepared. [...] We were very fortunate that there were no serious injuries or property damage." Additionally, registration for the Great Southern California ShakeOut, a regional earthquake drill scheduled to occur on November 13, 2008, increased significantly in the aftermath of the earthquake. See also California List of earthquakes in 2008 List of earthquakes in California List of earthquakes in the United States References https://earthquake.usgs.gov/earthquakes/eventpage/usp000gddf#general_region M 5.4 - 5km S of Chino Hills, CA United States Geological Survey Significant Earthquake Database https://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1 https://web.archive.org/web/20060929000601/http://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1 dead September 29, 2006 National Geophysical Data Center / World Data Service (NGDC/WDS) National Geophysical Data Center, NOAA 10.7289/V5TD9V7K 1972 Data Set Further reading Kusanovic Danilo S. Taborda Ricardo Asimaki Domniki Soil–Structure Interaction Effects on a Regional Scale through Ground-Motion Simulations and Reduced Order Models: A Case Study from the 2008 Mw 5.4 Chino Hills Mainshock Bulletin of the Seismological Society of America 2023 0037-1106 10.1785/0120220241 External links Chino Hills earthquake on USGS https://www.theguardian.com/world/2008/aug/04/naturaldisasters.usa?gusrc=rss Apocalypse – but not right now. How California stays cool about the Big One Gliaster Dan August 4, 2008 The Guardian March 24, 2009 Category:Earthquakes in California Earthquake Category:2008 earthquakes Category:2008 natural disasters in the United States Earthquake Chino Hills earthquake Category:July 2008 in the United States