M 4.7 earthquake: Philippine Sea (Agana, Guam) — April 22, 1978

M 4.7 earthquake: Philippine Sea (Agana, Guam) — April 22, 1978. Epicenter 173 km SW of Agana, depth 33 km, 12:14 Local (1978-04-22 02:14 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (173 km SW of Agana, Guam) — 12.232, 143.78

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