QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000dc9n
USGS usp000dc9n

31 Dec 2004, 11:27

100 km S of Atka, Alaska

A magnitude 5 mwc earthquake at 15.3 km depth.

Depth15.3 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated13 February 2019Latest timestamp stored in this record

Published location

Where is 100 km S 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.

51.289000, -174.182000

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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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Continue exploring

Nearby events with a similar magnitude

M 5

78 km SE of Atka, Alaska

M 5

32 km SW of Adak, Alaska

M 5

86 km S of Atka, Alaska

M 5

89 km SSW of Atka, Alaska

M 5

79 km SSE of Atka, Alaska

M 5

84 km E of Adak, Alaska

Catalog fields and provenance
Event ID
usp000dc9n
Coordinates
51.289, -174.182
Network
us
Significance
385