QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us7000e407
USGS us7000e407
18 May 2021, 06:39
286 km WSW of Adak, Alaska
A magnitude 5 mb earthquake at 43.3 km depth.
Published location
Where is 286 km WSW 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.
51.188900, 179.387500
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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
us7000e407
Coordinates
51.1889, 179.3875
Network
us
Significance
385