M 4.6 earthquake: Philippine Sea (Agana, Guam) — July 28, 1999

M 4.6 earthquake: Philippine Sea (Agana, Guam) — July 28, 1999. Epicenter 237 km SW of Agana, depth 33 km, 19:53 Local (1999-07-28 09:53 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (237 km SW of Agana, Guam) — 11.852, 143.323

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