QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

22 km NW of McArthur, California

· -1.3 km deep · released about 32 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 60 kmModoc County 86 kmSiskiyou County 90 kmLassen County 97 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 2.0 (md)
Depth
-1.3 km below the surface
Felt
no reports yet
Nearest
Shasta County, 60 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3381 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 32 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 470,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 330,000× the energy of this one
  3. Around the size people start to feel M 3.0 30× the energy of this one
  4. This earthquake M 2.0 about 32 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 41.1878, -121.5983. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 60 km (38 mi) NE of here earthquakes near Shasta County
Modoc County, CA 86 km (54 mi) WSW of here earthquakes near Modoc County
Siskiyou County, CA 90 km (56 mi) ESE of here earthquakes near Siskiyou County
Lassen County, CA 97 km (61 mi) WNW of here earthquakes near Lassen County
Tehama County, CA 130 km (81 mi) NNE of here earthquakes near Tehama County

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

Aftershocks so far

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

  1. 1.7 7km NW of Montgomery Creek, CA
  2. 1.8 32km SE of Tennant, CA
  3. 1.5 32km SE of Tennant, CA
  4. 1.7 32km SE of Tennant, CA
  5. 2.7 32km SE of Tennant, CA
  6. 2.3 32km SE of Tennant, CA
  7. 1.7 32km SE of Tennant, CA
  8. 1.6 20km ESE of McArthur, CA
  9. 1.6 2km N of Fall River Mills, CA
  10. 1.5 12km N of Burney, CA
  11. 2.6 18km N of Big Bend, CA
  12. 2.0 10km SSW of Big Bend, CA
  13. 1.7 8km NE of Burney, CA
  14. 2.2 10km NE of Burney, CA
  15. 2.0 2km NNW of Big Bend, 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.