QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/nc40204628
USGS nc40204628
31 Oct 2007, 03:04
6 km NNE of East Foothills, California
A magnitude 5.5 mw earthquake at 9.7 km depth.
Published location
Where is 6 km NNE of East Foothills, California?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
37.433500, -121.774333
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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
nc40204628
Coordinates
37.4335, -121.7743333
Network
nc
Significance
1077