QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0000p3a
USGS usp0000p3a
30 May 1977, 16:16
80 km SW of Nikolski, Alaska
A magnitude 6 ms earthquake at 33 km depth.
Published location
Where is 80 km SW of Nikolski, 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.
52.428000, -169.707000
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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
usp0000p3a
Coordinates
52.428, -169.707
Network
us
Significance
554