M 5.3 earthquake: Philippine Sea (Agana, Guam) — April 16, 1999

M 5.3 earthquake: Philippine Sea (Agana, Guam) — April 16, 1999. Epicenter 580 km W of Agana, depth 33 km, 09:30 Local (1999-04-16 00:30 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (580 km W of Agana, Guam) — 11.721, 139.717

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