M 4.7 earthquake: North Pacific Ocean (Northern Mariana Islands) — May 23, 1977

M 4.7 earthquake: North Pacific Ocean (Northern Mariana Islands) — May 23, 1977. Epicenter 256 km N of Capitol Hill, depth 207 km, 14:01 Local (1977-05-23 03:01 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (256 km N, Northern Mariana Islands) — 17.444, 145.165

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