QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us20009nwi
USGS us20009nwi
21 Jun 2017, 20:20
272 km W of Adak, Alaska
A magnitude 5 mb earthquake at 159.3 km depth.
Published location
Where is 272 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.
52.176400, 179.423200
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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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Catalog fields and provenance
Event ID
us20009nwi
Coordinates
52.1764, 179.4232
Network
us
Significance
385