QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000h4w7
USGS usp000h4w7
9 Dec 2009, 02:25
55 km S of Adak, Alaska
A magnitude 5.1 mwc earthquake at 29.6 km depth.
Published location
Where is 55 km S 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.
51.384000, -176.752000
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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
usp000h4w7
Coordinates
51.384, -176.752
Network
us
Significance
400