M 4.7 earthquake: Philippine Sea (Surigao, Philippines) — March 15, 1977

M 4.7 earthquake: Philippine Sea (Surigao, Philippines) — March 15, 1977. Epicenter 20 km E of Surigao, depth 33 km, 07:52 Local (1977-03-14 23:52 UTC). Shaking felt by ~1.7M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (20 km E of Surigao, Philippines) — 9.755, 125.668

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