M 4.6 earthquake: Philippine Sea (Agana, Guam) — September 23, 1990

M 4.6 earthquake: Philippine Sea (Agana, Guam) — September 23, 1990. Epicenter 74 km W of Agana, depth 133 km, 04:21 Local (1990-09-22 18:21 UTC). Shaking felt by ~47K people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (74 km W of Agana, Guam) — 13.414, 144.064

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