M 4.8 earthquake: North Pacific Ocean (Northern Mariana Islands) — September 21, 1984

M 4.8 earthquake: North Pacific Ocean (Northern Mariana Islands) — September 21, 1984. Epicenter 409 km N of Capitol Hill, depth 33 km, 09:31 Local (1984-09-20 23:31 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (409 km N, Northern Mariana Islands) — 18.888, 145.8

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