M 6.0 earthquake: Philippine Sea (Naga, Philippines) — April 30, 1971

M 6.0 earthquake: Philippine Sea (Naga, Philippines) — April 30, 1971. Epicenter 139 km SW of Naga, depth 10 km, 03:56 Local (1971-04-29 19:56 UTC). Shaking felt by ~33.8M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (139 km SW of Naga, Philippines) — 12.715, 122.293

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