M 4.6 earthquake: Philippine Sea (Agana, Guam) — May 20, 1973

M 4.6 earthquake: Philippine Sea (Agana, Guam) — May 20, 1973. Epicenter 186 km SW of Agana, depth 71 km, 03:57 Local (1973-05-19 17:57 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (186 km SW of Agana, Guam) — 12.125, 143.731

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