QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

13km SE of Dunsmuir, CA

· 6.6 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 43 kmSiskiyou County 60 kmTrinity County 97 kmTehama County 112 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 2.5 (md)
Depth
6.6 km below the surface
Felt
11 reports · strongest reported intensity IV
Nearest
Shasta County, 43 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1744 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 11 people have reported feeling it to USGS.

How big was it?

This earthquake released about 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 83,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 59,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.2× the energy of this one
  4. This earthquake M 2.5 about 180 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 41.1355, -122.1508. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 43 km (27 mi) NNW of here earthquakes near Shasta County
Siskiyou County, CA 60 km (37 mi) SSE of here earthquakes near Siskiyou County
Trinity County, CA 97 km (61 mi) NE of here earthquakes near Trinity County
Tehama County, CA 112 km (70 mi) N of here earthquakes near Tehama County

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

Aftershocks so far

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

  1. 1.9 10km NW of Burney, CA
  2. 1.5 10km NW of Burney, CA
  3. 1.8 22km N of Big Bend, CA
  4. 1.8 8km NNW of Bella Vista, CA
  5. 1.8 7km NNW of Bella Vista, CA
  6. 1.5 7km NNW of Bella Vista, CA
  7. 2.1 7km NNW of Bella Vista, CA
  8. 1.7 7km NNW of Bella Vista, CA
  9. 1.6 7km NNW of Bella Vista, CA
  10. 1.6 8km NNW of Bella Vista, CA
  11. 2.7 8km ENE of Shasta Lake, CA
  12. 1.5 8km N of Bella Vista, CA
  13. 1.7 12km SSW of Tennant, CA
  14. 1.8 4km N of McCloud, CA
  15. 1.6 8km NE of Shasta Lake, 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.