QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000892w
USGS usp000892w
15 Oct 1997, 04:11
99 km WSW of Adak, Alaska
A magnitude 6.4 mwc earthquake at 22 km depth.
Published location
Where is 99 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.
51.430000, -177.877000
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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
usp000892w
Coordinates
51.43, -177.877
Network
us
Significance
630