QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem886172
USGS iscgem886172
16 Mar 1957, 02:34
162 km WSW of Adak, Alaska
A magnitude 7.2 mw earthquake at 25 km depth.
Published location
Where is 162 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.
51.419000, -178.870000
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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
iscgem886172
Coordinates
51.419, -178.87
Network
iscgem
Significance
793