QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem914049
USGS iscgem914049
31 Mar 1913, 03:41
203 km WSW of Adak, Alaska
A magnitude 6.9 mw earthquake at 35 km depth.
Published location
Where is 203 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.
51.356000, -179.454000
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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
iscgem914049
Coordinates
51.356, -179.454
Network
iscgem
Significance
732