QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000gvh8
USGS usp000gvh8

28 Mar 2009, 22:37

99 km WSW of Nikolski, Alaska

A magnitude 5 mb earthquake at 74.1 km depth.

Depth74.1 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated13 February 2019Latest timestamp stored in this record

Published location

Where is 99 km WSW 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.

52.703000, -170.288000

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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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Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.

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Nearby events with a similar magnitude

M 5

9 km E of Nikolski, Alaska

M 5

71 km NW of Nikolski, Alaska

M 5

59 km WSW of Nikolski, Alaska

M 5

52 km SW of Nikolski, Alaska

M 5

50 km SW of Nikolski, Alaska

M 5

129 km WSW of Nikolski, Alaska

Catalog fields and provenance
Event ID
usp000gvh8
Coordinates
52.703, -170.288
Network
us
Significance
385