QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem911261
USGS iscgem911261
22 Jan 1923, 09:04
The 1923 Humboldt County, California Earthquake
A magnitude 7.1 mw earthquake at 15 km depth.
Published location
Where is The 1923 Humboldt County, 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.
40.482000, -125.034000
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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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Catalog fields and provenance
Event ID
iscgem911261
Coordinates
40.482, -125.034
Network
iscgem
Significance
780