M 5.1 earthquake: Philippine Sea (Surigao, Philippines) — April 3, 1981

M 5.1 earthquake: Philippine Sea (Surigao, Philippines) — April 3, 1981. Epicenter 25 km E of Surigao, depth 73 km, 06:58 Local (1981-04-02 22:58 UTC). Shaking felt by ~4.5M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (25 km E of Surigao, Philippines) — 9.821, 125.712

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