M 4.9 earthquake: North Pacific Ocean (Northern Mariana Islands) — April 21, 1984

M 4.9 earthquake: North Pacific Ocean (Northern Mariana Islands) — April 21, 1984. Epicenter 380 km N of Capitol Hill, depth 33 km, 20:24 Local (1984-04-21 10:24 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (380 km N, Northern Mariana Islands) — 18.627, 145.549

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