M 4.9 earthquake near North Pacific Ocean (Japan) — 1977-09-20

Magnitude 4.9 earthquake near North Pacific Ocean (549 km SE, Japan), depth 33 km, 22:34 Local (1977-09-20 13:34 UTC). Shaking felt by 0 people. Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (549 km SE, Japan) — 31.117, 142.47

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