M 5.5 earthquake: Philippine Sea (Naha, Japan) — October 21, 1971

M 5.5 earthquake: Philippine Sea (Naha, Japan) — October 21, 1971. Epicenter 284 km SW of Naha, depth 50 km, 17:22 Local (1971-10-21 08:22 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (284 km SW of Naha, Japan) — 24.821, 125.291

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