M 4.8 earthquake near Philippine Sea (Guam) — 1981-04-21

Magnitude 4.8 earthquake near Philippine Sea (362 km W of Agana, Guam), depth 60 km, 20:30 Local (1981-04-21 11:30 UTC). Shaking felt by 0 people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (362 km W of Agana, Guam) — 12.227, 141.667