QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000gmh4
USGS usp000gmh4

31 Oct 2008, 14:23

56 km SSW of Atka, Alaska

A magnitude 5.1 mwc earthquake at 46.4 km depth.

Depth46.4 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated22 December 2025Latest timestamp stored in this record

Published location

Where is 56 km SSW of Atka, 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.

51.705000, -174.423000

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Map data © OpenStreetMap contributors

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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Nearby events with a similar magnitude

M 5.1

109 km SSW of Adak, Alaska

M 5.1

62 km SW of Adak, Alaska

M 5.1

45 km ESE of Adak, Alaska

M 5.1

105 km SE of Atka, Alaska

M 5.1

76 km SSE of Atka, Alaska

M 5.1

39 km S of Adak, Alaska

Catalog fields and provenance
Event ID
usp000gmh4
Coordinates
51.705, -174.423
Network
us
Significance
400