QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

16km ESE of McCloud, CA

· 9.5 km deep · released about 82 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 47 kmSiskiyou County 65 kmTrinity County 112 kmModoc County 115 kmTehama 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 2.3 (md)
Depth
9.5 km below the surface
Felt
no reports yet
Nearest
Shasta County, 47 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2146 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 82 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 82 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 41.1805, -121.9812. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 47 km (29 mi) N of here earthquakes near Shasta County
Siskiyou County, CA 65 km (40 mi) SE of here earthquakes near Siskiyou County
Trinity County, CA 112 km (70 mi) ENE of here earthquakes near Trinity County
Modoc County, CA 115 km (71 mi) WSW of here earthquakes near Modoc County
Tehama County, CA 119 km (74 mi) N of here earthquakes near Tehama County
Lassen County, CA 125 km (78 mi) WNW of here earthquakes near Lassen 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. 1.7 24km N of Shasta Lake, CA
  2. 1.7 27km N of Shasta Lake, CA
  3. 1.8 23km N of Shasta Lake, CA
  4. 1.9 9km E of Montgomery Creek, CA
  5. 1.9 16km SSE of McCloud, CA
  6. 1.6 19km NE of Big Bend, CA
  7. 2.1 13km NE of Montgomery Creek, CA
  8. 1.9 19km SW of Tennant, CA
  9. 1.6 12km SE of Dunsmuir, CA
  10. 2.5 13km SE of Dunsmuir, CA
  11. 2.1 10km NNW of Burney, CA
  12. 2.0 21km WSW of Dunsmuir, CA
  13. 1.9 9km SSE of McCloud, CA
  14. 2.0 6km NE of Dunsmuir, CA
  15. 1.5 6km NE of Dunsmuir, 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.