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Sierra Madre fault map brings new restrictions
Sierra Madre fault map brings new restrictions

New earthquake restrictions on development are now in effect across a large swath of the northern San Gabriel Valley after the state released final maps for a section of the Sierra Madre fault zone. The fault is one of Los Angeles County's longest, stretching more than 50 miles along the foothills of the San Gabriel Mountains, which were created by earthquake activity. The fault, which last ruptured more than 8,000 years ago, could produce an earthquake as large as magnitude 7.5. Under state law, new development is generally prohibited within 50 feet of an active fault. Developers who want to build in this new zone would have to prove that their projects are not above an active...

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