M7.1 Earthquake — Southwest Indian Ridge

A magnitude 7.1 (major) earthquake struck Southwest Indian Ridge on 1933-01-21 19:21 UTC, at a depth of 10 km. See it live on Earth Live's real-time 3D globe.

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Source: USGS event page. The TNT equivalent is computed from the magnitude with the standard Gutenberg–Richter energy relation; all other figures are USGS's own.

This area's earthquake history

In the year before this quake, USGS recorded 1 earthquake of magnitude 2.5 or more within 300 km.

Strongest recorded within 300 km since 1900:

• M7.5 — South Indian Ocean · 1951-12-08
• M7.0 — South Indian Ocean · 1925-04-11
• M7.0 — South Indian Ocean · 1926-09-02

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• M5.2 — 101 km SSW of Severo-Kuril’sk, Russia
• M4.7 — 6 km ESE of Tōgane, Japan
• M6.2 — 79 km SSE of Panguna, Papua New Guinea
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