QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/nc227958
USGS nc227958

16 Aug 1991, 23:26

136 km WSW of Brookings, Oregon

A magnitude 6.1 ml earthquake at 2.5 km depth.

Depth2.5 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated28 April 2022Latest timestamp stored in this record

Published location

Where is 136 km WSW of Brookings, Oregon?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

41.661167, -125.845500

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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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Nearby events with a similar magnitude

M 6.07

123 km WSW of Ferndale, California

M 6.13

172 km WSW of Crescent City, California

M 6.02

53 km SW of Ferndale, California

M 6.02

105 km W of Ferndale, California

M 6.01

31 km NW of Shelter Cove, California

M 6

Near Rio Dell, California

Catalog fields and provenance
Event ID
nc227958
Coordinates
41.6611667, -125.8455
Network
nc
Significance
572