QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us1000gfvg
USGS us1000gfvg
23 Aug 2018, 04:35
97 km SW of Adak, Alaska
A magnitude 6.3 mww earthquake at 20 km depth.
Published location
Where is 97 km SW 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.
51.350000, -177.760400
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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
us1000gfvg
Coordinates
51.35, -177.7604
Network
us
Significance
611