QuakeIndex

Earthquakes in Napa County, California

← Earthquakes in California

20

Quiet QuakeIndex 20 / 100

2 quakes of M1.5 or larger in the last 7 days within 50 km. Normal for here is 4 to 8 in a week.

Compared against Napa County, California's own 10 years · USGS catalogue · updated

The last 30 days

Aug 29 Sep 13 Sep 27
Each mark is a day's largest quake within range; its size is the magnitude. The shaded band is the magnitude a day's largest quake normally falls in here (M1.7–M2.2), from this place's own 10-year record. A mark above the band is a bigger day than usual.

Live · last 7 days

Latest earthquakes within 50 km

2 in the latest snapshot we hold; the full 7 days load from USGS as this page opens.

  1. 0.3 2 km WNW of The Geysers, CA 50 km (31 mi) SE · 3 km deep
  2. 0.7 2 km NNW of The Geysers, CA 49 km (31 mi) SE · 1 km deep

Source USGS · snapshot of

Where this is

Centre 38.507, -122.326 — the Census internal point, from the US Census Bureau Gazetteer (2024). Activity is measured within 50 km of it.

Largest on record nearby

MagnitudeWhenWhere
M 4.4 3km N of Santa Rosa, CA
M 4.3 4km N of Santa Rosa, CA
M 4.3 1 km ESE of The Geysers, CA
M 4.2 1km NE of The Geysers, CA
M 4.2 2 km N of The Geysers, CA
M 4.2 3 km SSW of Cobb, California
M 4.2 1km WSW of The Geysers, CA
M 4.1 2km NNW of The Geysers, CA

From the QuakeIndex catalogue, built from the USGS FDSN event service · within 50 km of the centre above.

After an earthquake here