M 4.7 earthquake: Philippine Sea (Tuguegarao, Philippines) — July 22, 1977

M 4.7 earthquake: Philippine Sea (Tuguegarao, Philippines) — July 22, 1977. Epicenter 117 km SE of Tuguegarao, depth 33 km, 00:23 Local (1977-07-21 15:23 UTC). Shaking felt by ~3.2M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (117 km SE of Tuguegarao, Philippines) — 17.137, 122.71

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