M 5.6 - 22 km NW of Fenoarivo Be, Madagascar
- 1991-04-21 23:12:22 (UTC)
- 18.287°S 46.416°E
- 18.6 km depth
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VIImmi 
Estimated Intensity Map Origin - Review Status
- REVIEWED
- Magnitude
- 5.6 mw
- Depth
- 18.6 km
- Time
- 1991-04-21 23:12:22 UTC
Focal Mechanism Fault Plane Solution View Nearby Seismicity - Time Range
± Three Weeks - Search Radius
250.0 km - Magnitude Range
≥ 2.0
Contributors US
USGS National Earthquake Information Center, PDE