QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0004kuf
USGS usp0004kuf
18 Jan 1991, 10:45
western Indian-Antarctic Ridge
A magnitude 6.3 mw earthquake at 10 km depth.
Published location
Where is western Indian-Antarctic Ridge?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-51.145000, 139.415000
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What the numbers mean
Magnitude measures event size; depth locates the source below the surface. Neither value alone establishes local damage or personal risk.
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Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp0004kuf
Coordinates
-51.145, 139.415
Network
us
Significance
611