QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem793841
USGS iscgem793841
18 Jul 1970, 02:48
141 km WSW of Adak, Alaska
A magnitude 6.1 mw earthquake at 31.3 km depth.
Published location
Where is 141 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.
51.353000, -178.504000
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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
iscgem793841
Coordinates
51.353, -178.504
Network
iscgem
Significance
572