QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem845214
USGS iscgem845214
4 Jul 1966, 19:33
246 km W of Adak, Alaska
A magnitude 6.8 mw earthquake at 17.6 km depth.
Published location
Where is 246 km W 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.
51.789000, 179.798000
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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
iscgem845214
Coordinates
51.789, 179.798
Network
iscgem
Significance
711