QQuakeFacts
USGS usp000g371

6 Apr 2008, 08:23

283 km W of Adak, Alaska

A magnitude 5.4 mwc earthquake at 62.9 km depth.

Depth62.9 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated22 December 2025Latest timestamp stored in this record

Published location

Where is 283 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.

51.614000, 179.276000

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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
usp000g371
Coordinates
51.614, 179.276
Network
us
Significance
449