M 4.7 earthquake: Philippine Sea (Agana, Guam) — April 18, 1987

M 4.7 earthquake: Philippine Sea (Agana, Guam) — April 18, 1987. Epicenter 419 km W of Agana, depth 33 km, 05:06 Local (1987-04-17 20:06 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (419 km W of Agana, Guam) — 12.198, 141.108

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