QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/ci3366099
USGS ci3366099
21 Oct 1942, 17:22
The 1942 Fish Creek Mountains, California Earthquake
A magnitude 6.6 mw earthquake at 6 km depth.
Published location
Where is The 1942 Fish Creek Mountains, 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.
32.975333, -115.785333
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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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Catalog fields and provenance
Event ID
ci3366099
Coordinates
32.9753333, -115.7853333
Network
ci
Significance
670