M 4.9 earthquake: South Atlantic Ocean (South Georgia and the Islands) — February 28, 1975

M 4.9 earthquake: South Atlantic Ocean (South Georgia and the Islands) — February 28, 1975. Epicenter 628 km E of Grytviken, depth 33 km, 20:55 Local (1975-02-28 22:55 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Atlantic Ocean (628 km E, South Georgia and the Islands) — -55.838, -27.012

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