QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us7000dec0
USGS us7000dec0
28 Feb 2021, 10:44
185 km WSW of Adak, Alaska
A magnitude 5.4 mww earthquake at 22 km depth.
Published location
Where is 185 km WSW of Adak, Alaska?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
51.068100, -178.968400
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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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Catalog fields and provenance
Event ID
us7000dec0
Coordinates
51.0681, -178.9684
Network
us
Significance
449