M 4.6 earthquake: North Pacific Ocean (Northern Mariana Islands) — March 21, 1976

M 4.6 earthquake: North Pacific Ocean (Northern Mariana Islands) — March 21, 1976. Epicenter 274 km NE of Capitol Hill, depth 43 km, 17:47 Local (1976-03-21 07:47 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (274 km NE, Northern Mariana Islands) — 16.933, 147.584

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