QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem904459
USGS iscgem904459
10 Aug 1935, 18:31
southwestern Atlantic Ocean
A magnitude 6.1 mw earthquake at 15 km depth.
Published location
Where is southwestern 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.
-63.938000, -22.808000
Open the interactive map ↗Map data © OpenStreetMap contributors
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
iscgem904459
Coordinates
-63.938, -22.808
Network
iscgem
Significance
580