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The 1990 Luzon earthquake occurred on July 16 at 4:26 p.m. or 3:26 p.m. on the densely populated island of Luzon in the Philippines.The shock had a surface-wave magnitude of 7.8 and produced a 125 km-long ground rupture that stretched from Dingalan, Aurora to Kayapa, Nueva Vizcaya.
The Alder Creek Bridge in Manchester, California, is located within an Alquist-Priolo Earthquake Fault Zone. [ 2 ] Buildings built before 1972 may still lie on top of active faults, and those buildings can remain where they were originally built, unless they undergo a major remodel where more than 50% of the building changes.
Seismic Hazards Mapping Act; California State Legislature; Full name: An act to amend Sections 2621.9 and 2622 of, to amend, repeal, and add Sections 2705 and 2706 of, and to add Chapter 7.8 (commencing within Section 2690) to Division 2 of, the Public Resources Code, relating to seismic safety, and making an appropriation therefor.
A California Highway Patrol officer checks the damage to cars after the upper deck of the Bay Bridge collapsed in the Loma Prieta earthquake on Oct. 17, 1989. (George Nikitin / Associated Press)
The 1990 Luzon earthquake caused widespread damage in the Philippines. The earthquake produced a 125 km-long ground rupture that stretched from Dingalan, Aurora to Kayapa, Nueva Vizcaya. The event was a result of strike-slip movements along the Philippine Fault and the Digdig Fault within the Philippine fault system. [109]
The earliest known earthquake in the U.S. state of California was documented in 1769 by the Spanish explorers and Catholic missionaries of the Portolá expedition as they traveled northward from San Diego along the Santa Ana River near the present site of Los Angeles. Ship captains and other explorers also documented earthquakes.
By RYAN GORMAN A massive earthquake that struck the Bay Area on October 17, 1989 forever changed the region, and potentially altered the course of baseball history. The 6.9-magnitude Loma Prieta ...
The magnitude 4.4 earthquake that rattled Los Angeles on Monday was centered within one of the region's most potentially destructive fault systems, one capable of producing a magnitude 7.5 ...