QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0001bsc
USGS usp0001bsc
18 Jan 1981, 03:06
South Shetland Islands
A magnitude 6 mb earthquake at 22 km depth.
Published location
Where is South Shetland Islands?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-61.091000, -55.426000
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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
usp0001bsc
Coordinates
-61.091, -55.426
Network
us
Significance
554