QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/ci9108652
USGS ci9108652

16 Oct 1999, 10:46

The 1999 Hector Mine, California Earthquake

A magnitude 7.1 mw earthquake at 13.7 km depth.

Depth13.7 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated11 August 2026Latest timestamp stored in this record

Published location

Where is The 1999 Hector Mine, 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.

34.603333, -116.265000

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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

M 6.9

The 1940 Imperial Valley, California Earthquake

M 7.3

The 1992 Landers, California Earthquake

M 6.7

The 1918 San Jacinto, California Earthquake

M 6.6

The 1942 Fish Creek Mountains, California Earthquake

M 6.6

The 1968 Borrego Mountain, California Earthquake

M 6.6

The 1987 Superstition Hills, California Earthquake

Catalog fields and provenance
Event ID
ci9108652
Coordinates
34.6033333, -116.265
Network
ci
Significance
1576