QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

9 km SE of Mineral, California

· 4.6 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 65 kmPlumas County 67 kmShasta County 69 kmButte County 70 kmLassen County 88 kmGlenn County 109 kmYuba County 115 kmSierra County 115 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
4.6 km below the surface
Felt
no reports yet
Nearest
Tehama County, 65 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3435 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 20 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 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 40.2938, -121.5010. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 65 km (40 mi) ENE of here earthquakes near Tehama County
Plumas County, CA 67 km (41 mi) WNW of here earthquakes near Plumas County
Shasta County, CA 69 km (43 mi) SE of here earthquakes near Shasta County
Butte County, CA 70 km (44 mi) N of here earthquakes near Butte County
Lassen County, CA 88 km (55 mi) WSW of here earthquakes near Lassen County
Glenn County, CA 109 km (68 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

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

  1. 1.6 12km NNE of Mineral, CA
  2. 1.8 1km WSW of Canyondam, CA
  3. 2.1 13km SE of Mineral, CA
  4. 2.0 12km NNE of Shingletown, CA
  5. 2.0 11km ENE of Hamilton Branch, CA
  6. 1.5 19km SE of Round Mountain, CA
  7. 1.9 11km WNW of Belden, CA
  8. 2.7 12km NW of Viola, CA
  9. 1.6 11km WSW of Chester, CA
  10. 1.6 1km SSW of Canyondam, CA
  11. 2.4 7 km SSE of Mineral, California
  12. 1.8 8km S of Mineral, CA
  13. 2.2 3 km ESE of Prattville, California
  14. 2.2 3 km NW of Canyondam, California
  15. 2.0 17 km SW of Mineral, California

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.