M 4.7 earthquake: Philippine Sea (Agana, Guam) — August 20, 1976

M 4.7 earthquake: Philippine Sea (Agana, Guam) — August 20, 1976. Epicenter 278 km W of Agana, depth 156 km, 09:58 Local (1976-08-19 22:58 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (278 km W of Agana, Guam) — 12.513, 142.38

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