M 4.7 earthquake: Philippine Sea (Agana, Guam) — February 23, 1981

M 4.7 earthquake: Philippine Sea (Agana, Guam) — February 23, 1981. Epicenter 537 km SW of Agana, depth 33 km, 21:08 Local (1981-02-23 12:08 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (537 km SW of Agana, Guam) — 9.43, 142.051

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