QuakeIndex

Earthquake · automatic estimate, may change

M 1.9md

12 km WSW of Manton, CA

· 21 km deep · released about 24 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 34 kmShasta County 45 kmButte County 84 kmGlenn County 92 kmTrinity County 101 kmPlumas County 106 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
21 km below the surface
Felt
no reports yet
Nearest
Tehama County, 34 km SW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 359 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 24 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 5.8 640,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 450,000× the energy of this one
  3. Around the size people start to feel M 3.0 40× the energy of this one
  4. This earthquake M 1.9 about 24 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 40.3608, -121.9778. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 34 km (21 mi) NE of here earthquakes near Tehama County
Shasta County, CA 45 km (28 mi) S of here earthquakes near Shasta County
Butte County, CA 84 km (52 mi) NNW of here earthquakes near Butte County
Glenn County, CA 92 km (57 mi) NNE of here earthquakes near Glenn County
Trinity County, CA 101 km (63 mi) ESE of here earthquakes near Trinity County
Plumas County, CA 106 km (66 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

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

  1. 1.9 2 km ENE of Palo Cedro, CA
  2. 1.9 1 km ENE of Palo Cedro, CA
  3. 1.9 3 km S of Palo Cedro, CA
  4. 1.6 10 km NNE of Mineral, CA
  5. 1.9 10 km SW of Manton, CA
  6. 1.6 13 km NE of Mineral, CA
  7. 1.6 3 km NE of Mineral, CA
  8. 1.8 14 km NNW of Viola, CA
  9. 2.0 4 km NNW of Millville, CA
  10. 1.8 15 km W of Round Mountain, CA
  11. 1.9 2 km N of Millville, CA
  12. 2.1 4 km E of Millville, CA
  13. 1.6 10 km SW of Manton, CA
  14. 1.8 8 km S of Mineral, CA
  15. 1.9 1 km S of Shasta 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.