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El Centro


The 1940 El Centro earthquake struck on 18 May 1940, due to a rupture of the Imperial Fault, and was the strongest recorded earthquake to hit the Imperial Valley. The main earthquake happened at 9:35pm local time (magnitude 7.1 on the Richter scale, intensity X), with a strong secondary quake at 10:51pm (magnitude 5.5 on the Richter scale, intensity IX).

Accelerogram data file