M 4.8 earthquake: Indian Ocean (Antarctica) — April 19, 1977

M 4.8 earthquake: Indian Ocean (Antarctica) — April 19, 1977. Epicenter 1923 km NW of Showa Station, depth 33 km, 06:49 Local (1977-04-19 04:49 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Indian Ocean (1923 km NW, Antarctica) — -52.731, 27.382

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