M 4.8 earthquake: Philippine Sea (Agana, Guam) — August 20, 1987

M 4.8 earthquake: Philippine Sea (Agana, Guam) — August 20, 1987. Epicenter 294 km SW of Agana, depth 33 km, 18:51 Local (1987-08-20 08:51 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (294 km SW of Agana, Guam) — 11.887, 142.585

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