M 4.5 earthquake: Philippine Sea (Agana, Guam) — July 21, 1999

M 4.5 earthquake: Philippine Sea (Agana, Guam) — July 21, 1999. Epicenter 173 km SW of Agana, depth 33 km, 13:33 Local (1999-07-21 03:33 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (173 km SW of Agana, Guam) — 12.101, 143.987

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