QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/official19590818063714000_12
USGS official19590818063714000_12

18 Aug 1959, 07:37

The 1959 Hebgen Lake, Montana Earthquake

A magnitude 7.2 mw earthquake at 12 km depth.

Depth12 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated27 May 2024Latest timestamp stored in this record

Published location

Where is The 1959 Hebgen Lake, Montana Earthquake?

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

44.792500, -111.200100

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 6.6

The 1925 Clarkston Valley, Montana Earthquake

M 6.4

Clarkston Valley, Montana (Aftershock)

M 6.3

22 km SW of Mammoth, Wyoming

M 6.13

12 km N of Winston, Montana

M 6.1

30 km SSW of Big Sky, Montana

M 5.3

29 km WSW of Freedom, Idaho

Catalog fields and provenance
Event ID
official19590818063714000_12
Coordinates
44.7925, -111.2001
Network
official
Significance
798