M 5.3 earthquake: Philippine Sea (Surigao, Philippines) — February 28, 1973

M 5.3 earthquake: Philippine Sea (Surigao, Philippines) — February 28, 1973. Epicenter 75 km E of Surigao, depth 81 km, 16:07 Local (1973-02-28 08:07 UTC). Shaking felt by ~4.5M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (75 km E of Surigao, Philippines) — 9.551, 126.127

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