M 4.9 earthquake: Philippine Sea (Capitol Hill, Northern Mariana Islands) — January 21, 1978

M 4.9 earthquake: Philippine Sea (Capitol Hill, Northern Mariana Islands) — January 21, 1978. Epicenter 937 km N of Capitol Hill, depth 33 km, 02:22 Local (1978-01-20 17:22 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (937 km N of Capitol Hill, Northern Mariana Islands) — 22.992, 142.324

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