Data last collected:
QuakeFactsEvidence report · prepared 9 October 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.
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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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
Catalog fields and provenance
Event ID
usp000dc9n
Coordinates
51.289, -174.182
Network
us
Significance
385
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Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right 100 km S of Atka, Alaska earthquake: magnitude 5 and depth | QuakeFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.