QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem905941
USGS iscgem905941
2 Dec 1933, 20:05
South Atlantic Ocean
A magnitude 6.4 mw earthquake at 10 km depth.
Published location
Where is South Atlantic Ocean?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-51.844000, -46.353000
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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.
Need a current safety answer?
Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
Catalog fields and provenance
Event ID
iscgem905941
Coordinates
-51.844, -46.353
Network
iscgem
Significance
620