M 4.9 earthquake: North Pacific Ocean (Mexico) — March 12, 1977

M 4.9 earthquake: North Pacific Ocean (Mexico) — March 12, 1977. Epicenter 309 km SW of Puerto Vallarta, depth 33 km, 01:09 Local (1977-03-12 08:09 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (309 km SW, Mexico) — 18.655, -107.271

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