M 4.5 earthquake: North Pacific Ocean (Northern Mariana Islands) — February 21, 1976

M 4.5 earthquake: North Pacific Ocean (Northern Mariana Islands) — February 21, 1976. Epicenter 475 km N of Capitol Hill, depth 187 km, 16:55 Local (1976-02-21 06:55 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (475 km N, Northern Mariana Islands) — 19.452, 145.231

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