QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

18km N of Big Bend, CA

· 10 km deep · released about 250 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 48 kmSiskiyou County 69 kmModoc County 110 kmTrinity County 117 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 2.6 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Shasta County, 48 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3107 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 250 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 61,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 43,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.8× the energy of this one
  4. This earthquake M 2.6 about 250 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 41.1828, -121.9140. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 48 km (30 mi) NNE of here earthquakes near Shasta County
Siskiyou County, CA 69 km (43 mi) SE of here earthquakes near Siskiyou County
Modoc County, CA 110 km (68 mi) WSW of here earthquakes near Modoc County
Trinity County, CA 117 km (73 mi) ENE of here earthquakes near Trinity County
Lassen County, CA 120 km (75 mi) WNW of here earthquakes near Lassen County
Tehama County, CA 121 km (75 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

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

  1. 1.6 12km W of Fall River Mills, CA
  2. 1.8 17km NNE of Bella Vista, CA
  3. 1.6 16km N of McCloud, CA
  4. 1.6 26km NNE of Shasta Lake, CA
  5. 2.7 15km WNW of Fall River Mills, CA
  6. 1.6 4km WNW of Big Bend, CA
  7. 1.8 5km SW of Big Bend, CA
  8. 1.6 6km ENE of McCloud, CA
  9. 1.7 17km WNW of Round Mountain, CA
  10. 2.1 10km WNW of Dunsmuir, CA
  11. 2.8 7km NW of Montgomery Creek, CA
  12. 1.7 14km NNW of Big Bend, CA
  13. 1.6 21km W of Tennant, CA
  14. 1.7 7km N of Burney, CA
  15. 1.5 9km ENE of Mount Shasta, 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.