M 4.8 earthquake: Philippine Sea (Agana, Guam) — December 21, 1985

M 4.8 earthquake: Philippine Sea (Agana, Guam) — December 21, 1985. Epicenter 227 km SW of Agana, depth 33 km, 23:32 Local (1985-12-21 13:32 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (227 km SW of Agana, Guam) — 12.501, 142.904

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