M 4.5 earthquake off the coast of Puntarenas, Costa Rica — May 30, 1977

M 4.5 earthquake off the coast of Puntarenas, Costa Rica — May 30, 1977. Epicenter 250 km S of Puntarenas, depth 15 km, 04:20 Local (1977-05-30 10:20 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (250 km S, Costa Rica) — 7.732, -85.043

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