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USGS ci3329122

9 Apr 1968, 03:28

The 1968 Borrego Mountain, California Earthquake

A magnitude 6.6 mw earthquake at 10 km depth.

Depth10 kmPublished hypocentral depth

Tsunami flagNot flaggedUSGS catalog flag, not a current warning

Updated19 December 2025Latest timestamp stored in this record

Published location

Where is The 1968 Borrego Mountain, California 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.

33.179833, -116.103000

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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

The 1942 Fish Creek Mountains, California Earthquake

The 1987 Superstition Hills, California Earthquake

The 1947 Manix, California Earthquake

The 1918 San Jacinto, California Earthquake

The 1954 San Jacinto Fault, California Earthquake

52 km NE of Beatty, Nevada

Catalog fields and provenance

Event ID

ci3329122

Coordinates

33.1798333, -116.103

Network

ci

Significance

670