M 4.9 earthquake: North Pacific Ocean (Mexico) — December 21, 1977

M 4.9 earthquake: North Pacific Ocean (Mexico) — December 21, 1977. Epicenter 968 km SW of Lázaro Cárdenas, depth 33 km, 19:57 Local (1977-12-22 02:57 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (968 km SW, Mexico) — 10.876, -107.425

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