M 4.9 earthquake: Philippine Sea (Agana, Guam) — January 8, 1991

M 4.9 earthquake: Philippine Sea (Agana, Guam) — January 8, 1991. Epicenter 636 km W of Agana, depth 33 km, 03:29 Local (1991-01-07 18:29 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (636 km W of Agana, Guam) — 11.374, 139.303

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