QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem909154
USGS iscgem909154
20 Mar 1927, 16:13
130 km SSW of Adak, Alaska
A magnitude 6 mw earthquake at 25 km depth.
Published location
Where is 130 km SSW 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.
50.824000, -177.460000
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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
iscgem909154
Coordinates
50.824, -177.46
Network
iscgem
Significance
556