M 4.7 earthquake: North Pacific Ocean (Northern Mariana Islands) — July 31, 1988

M 4.7 earthquake: North Pacific Ocean (Northern Mariana Islands) — July 31, 1988. Epicenter 565 km N of Capitol Hill, depth 33 km, 21:59 Local (1988-07-31 11:59 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (565 km N, Northern Mariana Islands) — 20.065, 147.326

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