M 5.1 earthquake: North Pacific Ocean (Northern Mariana Islands) — January 23, 1977

M 5.1 earthquake: North Pacific Ocean (Northern Mariana Islands) — January 23, 1977. Epicenter 317 km N of Capitol Hill, depth 219 km, 15:38 Local (1977-01-23 05:38 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (317 km N, Northern Mariana Islands) — 18.049, 145.508

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