M 4.5 earthquake: North Pacific Ocean (Northern Mariana Islands) — March 1, 1975

M 4.5 earthquake: North Pacific Ocean (Northern Mariana Islands) — March 1, 1975. Epicenter 420 km N of Capitol Hill, depth 550 km, 06:48 Local (1975-02-28 20:48 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (420 km N, Northern Mariana Islands) — 18.936, 145.117

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