QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

6km N of Chico, CA

· 28 km deep · released about 22 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Butte County 25 kmTehama County 50 kmGlenn County 53 kmYuba County 72 kmColusa County 77 kmSutter County 85 kmPlumas County 89 kmNevada County 107 kmShasta County 109 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
28 km below the surface
Felt
no reports yet
Nearest
Butte County, 25 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2509 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 22 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 5.8 680,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 480,000× the energy of this one
  3. Around the size people start to feel M 3.0 43× the energy of this one
  4. This earthquake M 1.9 about 22 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 39.7940, -121.8393. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Butte County, CA 25 km (15 mi) NW of here earthquakes near Butte County
Tehama County, CA 50 km (31 mi) SE of here earthquakes near Tehama County
Glenn County, CA 53 km (33 mi) ENE of here earthquakes near Glenn County
Yuba County, CA 72 km (45 mi) NW of here earthquakes near Yuba County
Colusa County, CA 77 km (48 mi) NNE of here earthquakes near Colusa County
Sutter County, CA 85 km (53 mi) N of here earthquakes near Sutter County

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

Aftershocks so far

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

  1. 1.7 9km NNE of Los Molinos, CA
  2. 2.0 7km NE of Los Molinos, CA
  3. 1.9 12km SE of Los Molinos, CA
  4. 2.1 15km E of Willows, CA
  5. 2.3 4km SW of Hamilton City, CA
  6. 2.4 8km NNW of Hamilton City, CA
  7. 2.2 6km SE of Corning, CA
  8. 2.3 6km SE of Corning, CA
  9. 2.0 4km NE of Hamilton City, CA
  10. 1.8 5km NNE of Hamilton City, CA
  11. 1.7 10km S of Hamilton City, CA
  12. 2.0 10km NNW of Oroville, CA
  13. 2.5 4km NNE of Hamilton City, CA
  14. 2.5 5km NNE of Hamilton City, CA
  15. 2.6 5km NNE of Hamilton City, 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.