QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000jhh4
USGS usp000jhh4
11 Apr 2012, 10:00
67 km SSE of Adak, Alaska
A magnitude 5.5 mb earthquake at 20.8 km depth.
Published location
Where is 67 km SSE 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.
51.364000, -176.097000
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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
usp000jhh4
Coordinates
51.364, -176.097
Network
us
Significance
465