M 7.6 earthquake in Mexico (Chilpancingo) — July 28, 1957

M 7.6 earthquake in Mexico (Chilpancingo) — July 28, 1957. Epicenter 70 km SE of Chilpancingo, depth 38 km, 02:40 Local (1957-07-28 08:40 UTC). Shaking felt by ~74.2M people. Readings from every reporting agency, affected towns, aftershock sequence.

70 km SE of Chilpancingo (Mexico) — 17.055, -99.092

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