M 4.9 earthquake: North Atlantic Ocean (Panama) — August 28, 1977

M 4.9 earthquake: North Atlantic Ocean (Panama) — August 28, 1977. Epicenter 391 km S of Puerto Armuelles, depth 20 km, 10:40 Local (1977-08-28 15:40 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (391 km S, Panama) — 4.782, -82.477

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