2008 Chino Hills earthquake
earthquake that occurred on July 29 in southern California
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 miles (45 km) 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. Its epicenter was within 3 miles (4.8 km) of Chino Hills and its hypocenter was c. 15.5 kilometers (9.6 mi) deep.
The public source identifies “2008 Chino Hills earthquake” as earthquake that occurred on July 29 in southern California. This brief keeps that definition visible, then builds a research path around Chino, Hills and earthquake.
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This entry incorporates text from “2008 Chino Hills earthquake” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.