A minor magnitude 3.9 earthquake struck north of San Francisco on Monday, according to the United States Geological Survey.
The quake occurred at 7:08 a.m. Pacific time about 1 mile northwest of The Geyser, California, agency data shows.
USGS data previously reported the magnitude was 4.1.
As seismologists review available data, they may revise the reported intensity of an earthquake. Additional information collected about earthquakes may also lead USGS scientists to update the earthquake-severity map.
Aftershocks in the area
An aftershock is usually a smaller earthquake that occurs after a larger earthquake in the same general area. Aftershocks are usually minor adjustments to the part of a fault that moved during the initial earthquake.
Earthquakes and tremors within 100 miles
Aftershocks after the first earthquake may occur for days, weeks, or even years. These events may be of equal or greater magnitude than the initial earthquake, and they may continue to affect already damaged locations.
When earthquakes and tremors occurred
Source: United States Geological Survey | Notes: The aftershock categories are based on the modified Mercalli intensity scale. When aftershock data is available, related maps and charts include earthquakes within 100 miles and seven days of the initial earthquake. All times above are Pacific Time. Shake data as of Monday, November 24 at 2:53 PM Eastern. Aftershock data is as of Tuesday, November 25 at 5:24 PM Eastern.
Map: Daylight (urban area); maplibre (map rendering); Natural earth (roads, labels, terrain); Protomaps (map tiles)
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