QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

7 km E of Arbuckle, CA

· 0.2 km deep · released about 23 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sutter County 24 kmColusa County 28 kmYolo County 39 kmYuba County 61 kmNapa County 65 kmLake County 66 kmGlenn County 73 kmButte County 78 kmSolano County 85 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.9 (md)
Depth
0.2 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Sutter County, 24 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 411 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 23 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 39.0280, -121.9833. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sutter County, CA 24 km (15 mi) W of here earthquakes near Sutter County
Colusa County, CA 28 km (17 mi) SE of here earthquakes near Colusa County
Yolo County, CA 39 km (24 mi) N of here earthquakes near Yolo County
Yuba County, CA 61 km (38 mi) WSW of here earthquakes near Yuba County
Napa County, CA 65 km (40 mi) NNE of here earthquakes near Napa County
Lake County, CA 66 km (41 mi) E of here earthquakes near Lake County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

25 earthquakes have been recorded within 50 km since this one.

  1. 2.0 5 km E of Williams, CA
  2. 1.5 11 km ENE of Hidden Valley Lake, CA
  3. 1.6 14 km ESE of Hidden Valley Lake, CA
  4. 1.9 7 km ESE of Williams, CA
  5. 1.9 8 km WSW of Arbuckle, CA
  6. 2.0 10 km ESE of Hidden Valley Lake, CA
  7. 2.2 9 km SSW of South Yuba City, CA
  8. 2.3 9 km E of Lower Lake, CA
  9. 3.1 9 km ENE of Colusa, CA
  10. 1.7 11 km ESE of Hidden Valley Lake, CA
  11. 2.0 10 km ENE of Hidden Valley Lake, CA
  12. 1.5 10 km ENE of Hidden Valley Lake, CA
  13. 2.8 12 km SSE of Willows, CA
  14. 1.9 10 km ENE of Hidden Valley Lake, CA
  15. 2.4 10 km ENE of Hidden Valley Lake, CA

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.