QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

19km ESE of Anderson, CA

· 12 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 30 kmShasta County 43 kmButte County 89 kmGlenn County 90 kmTrinity County 92 kmPlumas County 116 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 1.8 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Tehama County, 30 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3149 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 40.3743, -122.0925. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 30 km (19 mi) NNE of here earthquakes near Tehama County
Shasta County, CA 43 km (27 mi) S of here earthquakes near Shasta County
Butte County, CA 89 km (55 mi) NNW of here earthquakes near Butte County
Glenn County, CA 90 km (56 mi) NNE of here earthquakes near Glenn County
Trinity County, CA 92 km (57 mi) ESE of here earthquakes near Trinity County
Plumas County, CA 116 km (72 mi) WNW of here earthquakes near Plumas County

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

Aftershocks so far

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

  1. 1.6 11km WSW of Shingletown, CA
  2. 1.7 12km WSW of Shingletown, CA
  3. 1.8 1km SW of Palo Cedro, CA
  4. 1.9 2km SSE of Palo Cedro, CA
  5. 1.5 20km WSW of Manton, CA
  6. 1.6 1km SSW of Palo Cedro, CA
  7. 1.6 18km SW of Manton, CA
  8. 1.6 19km SW of Manton, CA
  9. 1.7 9km NNE of Shasta Lake, CA
  10. 1.6 1km NNW of Shasta Lake, CA
  11. 1.6 17km SE of Anderson, CA
  12. 1.7 11km NNE of Shingletown, CA
  13. 1.6 12km NNE of Shingletown, CA
  14. 1.9 4km WSW of Bella Vista, CA
  15. 2.8 6km WSW of Bella Vista, 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.