M 6.4 earthquake: South Atlantic Ocean (Sierra Leone) — September 18, 1928

M 6.4 earthquake: South Atlantic Ocean (Sierra Leone) — September 18, 1928. Epicenter 1243 km SW of Freetown, depth 10 km, 16:19 Local (1928-09-18 17:19 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Atlantic Ocean (1243 km SW, Sierra Leone) — -0.197, -20.325

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