QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usd0010b4f
USGS usd0010b4f
21 Dec 2023, 14:55
116 km SE of Adak, Alaska
A magnitude 6.1 mww earthquake at 20 km depth.
Published location
Where is 116 km SE 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.
51.209700, -175.331300
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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
usd0010b4f
Coordinates
51.2097, -175.3313
Network
us
Significance
574