QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00047j3
USGS usp00047j3
6 Apr 1990, 08:52
South Sandwich Islands region
A magnitude 6 mw earthquake at 33 km depth.
Published location
Where is South Sandwich Islands region?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-60.527000, -25.482000
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.
Continue exploring
Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp00047j3
Coordinates
-60.527, -25.482
Network
us
Significance
554