QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us10008r89
USGS us10008r89
10 May 2017, 20:25
133 km W of Adak, Alaska
A magnitude 5.1 mww earthquake at 19.9 km depth.
Published location
Where is 133 km W 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.
51.763800, -178.560100
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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
us10008r89
Coordinates
51.7638, -178.5601
Network
us
Significance
400