M 4.7 earthquake: Philippine Sea (Surigao, Philippines) — September 23, 1973

M 4.7 earthquake: Philippine Sea (Surigao, Philippines) — September 23, 1973. Epicenter 73 km E of Surigao, depth 69 km, 00:05 Local (1973-09-22 16:05 UTC). Shaking felt by ~967K people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (73 km E of Surigao, Philippines) — 9.76, 126.155

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