M 4.9 earthquake: Philippine Sea (Butuan, Philippines) — March 1, 1977

M 4.9 earthquake: Philippine Sea (Butuan, Philippines) — March 1, 1977. Epicenter 112 km E of Butuan, depth 121 km, 17:10 Local (1977-03-01 09:10 UTC). Shaking felt by ~1.1M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (112 km E of Butuan, Philippines) — 8.621, 126.508

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