QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

5km ENE of Shasta, CA

· 22 km deep · released about 47 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 36 kmTehama County 57 kmTrinity County 58 kmSiskiyou County 108 kmGlenn County 113 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 2.1 (md)
Depth
22 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Shasta County, 36 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1359 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 40.6198, -122.4340. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 36 km (23 mi) WSW of here earthquakes near Shasta County
Tehama County, CA 57 km (36 mi) NNW of here earthquakes near Tehama County
Trinity County, CA 58 km (36 mi) E of here earthquakes near Trinity County
Siskiyou County, CA 108 km (67 mi) S of here earthquakes near Siskiyou County
Glenn County, CA 113 km (70 mi) N of here earthquakes near Glenn County
Butte County, CA 127 km (79 mi) NNW of here earthquakes near Butte County

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

Aftershocks so far

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

  1. 1.8 26 km N of Shasta Lake, CA
  2. 2.3 13 km NNE of Red Bluff, CA
  3. 1.7 9 km NE of Shasta Lake, CA
  4. 2.2 4 km ESE of Round Mountain, CA
  5. 1.5 25 km N of French Gulch, CA
  6. 2.4 14 km NNE of Red Bluff, CA
  7. 1.5 4 km NE of Millville, CA
  8. 1.5 0 km WSW of Shasta Lake, CA
  9. 2.4 18 km WSW of Shasta, CA
  10. 1.8 5 km E of Round Mountain, CA
  11. 1.9 5 km E of Round Mountain, CA
  12. 1.8 9 km NE of Shasta Lake, CA
  13. 1.5 18 km NNE of Bella Vista, CA
  14. 1.6 8 km NNW of Bella Vista, CA
  15. 1.9 5 km ENE of Redding, 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.