QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

18 km S of Mineral, CA

· 5.6 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Butte County 59 kmTehama County 60 kmPlumas County 64 kmShasta County 76 kmLassen County 97 kmGlenn County 99 kmYuba County 104 kmSierra County 110 kmNevada County 119 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 1.7 (md)
Depth
5.6 km below the surface
Felt
no reports yet
Nearest
Butte County, 59 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1063 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 40.1935, -121.5345. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Butte County, CA 59 km (37 mi) N of here earthquakes near Butte County
Tehama County, CA 60 km (37 mi) E of here earthquakes near Tehama County
Plumas County, CA 64 km (40 mi) WNW of here earthquakes near Plumas County
Shasta County, CA 76 km (47 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 99 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

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

  1. 2.0 3 km ENE of Canyondam, CA
  2. 2.1 1 km NNE of Prattville, CA
  3. 1.8 10 km WSW of Manton, CA
  4. 1.9 18 km SW of Manton, CA
  5. 1.9 19 km SW of Manton, CA
  6. 2.2 2 km NNW of Canyondam, CA
  7. 2.2 4 km SSE of Canyondam, CA
  8. 2.2 4 km SSE of Canyondam, CA
  9. 2.1 5 km SE of Canyondam, CA
  10. 1.8 6 km WSW of Greenville, California
  11. 2.8 5 km SSE of Canyondam, CA
  12. 2.3 2 km ESE of Canyondam, CA
  13. 3.5 2 km E of Canyondam, CA
  14. 2.4 2 km ENE of Canyondam, CA
  15. 2.6 2 km E 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.5 on 2023-05-11 — it released about 440,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.