Magnitude 5.9 Earthquake Depth 10 km Strikes Southeast Indian Ridge on 3rd January 2026

The Southeast Indian Ridge (SEIR) is a mid-ocean ridge in the southern Indian Ocean. A divergent tectonic plate boundary stretching almost 6,000 km (3,700 mi) between the Rodrigues triple junction (25°S 70°E) in the Indian Ocean and the Macquarie triple junction (63°S 165°E) in the Pacific Ocean, the SEIR forms the plate boundary between the Australian and Antarctic plates since the Oligocene.

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