QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

17km S of Mineral, CA

· 3.9 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 58 kmButte County 60 kmPlumas County 66 kmShasta County 75 kmLassen County 97 kmGlenn County 98 kmYuba County 105 kmSierra County 112 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
3.9 km below the surface
Felt
no reports yet
Nearest
Tehama County, 58 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1454 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 18 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 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 40.2013, -121.5517. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 58 km (36 mi) E of here earthquakes near Tehama County
Butte County, CA 60 km (37 mi) N of here earthquakes near Butte County
Plumas County, CA 66 km (41 mi) WNW of here earthquakes near Plumas County
Shasta County, CA 75 km (46 mi) SE of here earthquakes near Shasta County
Lassen County, CA 97 km (60 mi) SW of here earthquakes near Lassen County
Glenn County, CA 98 km (61 mi) NE of here earthquakes near Glenn 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. 2.8 2km NNE of Prattville, CA
  2. 2.4 4km E of Prattville, CA
  3. 2.1 3km ENE of Prattville, CA
  4. 2.1 4km E of Prattville, CA
  5. 3.0 1km N of Prattville, CA
  6. 2.5 1km ENE of Almanor, CA
  7. 2.6 4km E of Prattville, CA
  8. 2.4 3km E of Prattville, CA
  9. 2.6 3km SSW of East Shore, CA
  10. 2.6 4km E of Prattville, CA
  11. 2.4 4km SW of East Shore, CA
  12. 2.8 2km NNE of Almanor, CA
  13. 5.5 Lake Almanor Earthquake
  14. 2.4 12km S of Manton, CA
  15. 2.3 2km ESE of Canyondam, 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.