M 4.8 earthquake: Philippine Sea (Surigao, Philippines) — September 23, 1973

M 4.8 earthquake: Philippine Sea (Surigao, Philippines) — September 23, 1973. Epicenter 149 km E of Surigao, depth 37 km, 21:23 Local (1973-09-23 13:23 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (149 km E of Surigao, Philippines) — 9.831, 126.85

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