M 4.7 earthquake: North Pacific Ocean (Mexico) — December 12, 1977

M 4.7 earthquake: North Pacific Ocean (Mexico) — December 12, 1977. Epicenter 355 km SW of Puerto Vallarta, depth 33 km, 00:59 Local (1977-12-12 07:59 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (355 km SW, Mexico) — 19.393, -108.357

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