M 4.9 Earthquake: Philippine Sea (Agana, Guam) — October 18, 1987

M 4.9 Earthquake: Philippine Sea (Agana, Guam) — October 18, 1987. Epicenter 38 km NW of Agana, depth 136 km, 19:39 Local (1987-10-18 09:39 UTC). Shaking felt by ~122K people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (38 km NW of Agana, Guam) — 13.704, 144.49