M 4.6 earthquake: Philippine Sea (Agana, Guam) — February 9, 1978

M 4.6 earthquake: Philippine Sea (Agana, Guam) — February 9, 1978. Epicenter 74 km S of Agana, depth 89 km, 20:16 Local (1978-02-09 10:16 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (74 km S of Agana, Guam) — 12.811, 144.867

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