QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000hv7k
USGS usp000hv7k
1 Mar 2011, 12:49
278 km WSW of Adak, Alaska
A magnitude 5.4 mwc earthquake at 30.1 km depth.
Published location
Where is 278 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.
51.020000, 179.595000
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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
usp000hv7k
Coordinates
51.02, 179.595
Network
us
Significance
449