M 5.5 earthquake: Philippine Sea (Tuguegarao, Philippines) — March 19, 1977

M 5.5 earthquake: Philippine Sea (Tuguegarao, Philippines) — March 19, 1977. Epicenter 123 km SE of Tuguegarao, depth 15 km, 06:16 Local (1977-03-18 22:16 UTC). Shaking felt by ~11.5M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (123 km SE of Tuguegarao, Philippines) — 16.739, 122.438

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