M 4.7 earthquake: North Pacific Ocean (Northern Mariana Islands) — February 21, 1974

M 4.7 earthquake: North Pacific Ocean (Northern Mariana Islands) — February 21, 1974. Epicenter 360 km N of Capitol Hill, depth 167 km, 20:35 Local (1974-02-21 10:35 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (360 km N, Northern Mariana Islands) — 18.45, 145.61

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