M 4.7 earthquake: Philippine Sea (Surigao, Philippines) — May 12, 1991

M 4.7 earthquake: Philippine Sea (Surigao, Philippines) — May 12, 1991. Epicenter 74 km N of Surigao, depth 33 km, 06:12 Local (1991-05-11 22:12 UTC). Shaking felt by ~1.3M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (74 km N of Surigao, Philippines) — 10.427, 125.321

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