With a moment magnitude of 6. Ruptured gas lines leading to fires in several communities.
Strike Slip Motion and the 1987 California Earthquake Fault Connection
Two fatalities were attributed to heart attacks triggered by the intense shaking. This led to immediate changes in seismic design codes, particularly concerning the reinforcement of freeway structures and the implementation of stronger shear keys to prevent collapse.
Key impacts included: Severe damage to older, unreinforced masonry buildings in El Centro and Brawley. Tectonic Setting of the Imperial Valley The region where the 1987 earthquake occurred is a complex zone of crustal deformation.
Strike Slip Motion and the 1987 California Earthquake Fault Connection
The economic losses were considerable, with estimates placing the total cost in the hundreds of millions of dollars, a significant burden for the local economy reliant on agriculture. Unlike those catastrophic events, the 1987 quake did not rupture the surface, which limited its visual drama but did not diminish its destructive potential.
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