M 4.7 earthquake: North Pacific Ocean (Northern Mariana Islands) — September 22, 1978

M 4.7 earthquake: North Pacific Ocean (Northern Mariana Islands) — September 22, 1978. Epicenter 312 km N of Capitol Hill, depth 80 km, 17:49 Local (1978-09-22 07:49 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (312 km N, Northern Mariana Islands) — 17.945, 146.408

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