M 4.6 earthquake: Philippine Sea (Agana, Guam) — July 31, 1975

M 4.6 earthquake: Philippine Sea (Agana, Guam) — July 31, 1975. Epicenter 117 km S of Agana, depth 49 km, 13:04 Local (1975-07-31 03:04 UTC). Shaking felt by ~22K people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (117 km S of Agana, Guam) — 12.427, 144.882

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