QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0003cuh
USGS usp0003cuh

7 Feb 1988, 18:15

230 km S of Attu Station, Alaska

A magnitude 6.4 mw earthquake at 33 km depth.

Depth33 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated28 April 2022Latest timestamp stored in this record

Published location

Where is 230 km S of Attu Station, 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.

50.785000, 173.465000

Open the interactive map ↗

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.

Need a current safety answer?

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

Open the USGS event →

Continue exploring

Nearby events with a similar magnitude

M 6.4

81 km S of Attu Station, Alaska

M 6.4

235 km ESE of Attu Station, Alaska

M 6.37

67 km S of Attu Station, Alaska

M 6.46

77 km SE of Attu Station, Alaska

M 6.34

239 km SE of Attu Station, Alaska

M 6.49

66 km S of Attu Station, Alaska

Catalog fields and provenance
Event ID
usp0003cuh
Coordinates
50.785, 173.465
Network
us
Significance
630