M 5.5 earthquake: Philippine Sea (Surigao, Philippines) — April 24, 1970

M 5.5 earthquake: Philippine Sea (Surigao, Philippines) — April 24, 1970. Epicenter 81 km N of Surigao, depth 86 km, 08:17 Local (1970-04-24 00:17 UTC). Shaking felt by ~8.7M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (81 km N of Surigao, Philippines) — 10.515, 125.502