QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

4km SW of Shasta Lake, CA

· 24 km deep · released about 320 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 33 kmTrinity County 59 kmTehama County 61 kmSiskiyou County 104 kmGlenn 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 2.7 (md)
Depth
24 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Shasta County, 33 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3049 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 320 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 48,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 34,000× the energy of this one
  3. Around the size people start to feel M 3.0 3× the energy of this one
  4. This earthquake M 2.7 about 320 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 40.6568, -122.4117. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 33 km (21 mi) WSW of here earthquakes near Shasta County
Trinity County, CA 59 km (37 mi) E of here earthquakes near Trinity County
Tehama County, CA 61 km (38 mi) NNW of here earthquakes near Tehama County
Siskiyou County, CA 104 km (65 mi) S of here earthquakes near Siskiyou County
Glenn County, CA 117 km (73 mi) N of here earthquakes near Glenn County
Butte County, CA 130 km (81 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 5km WNW of Shasta Lake, CA
  2. 1.8 18km WNW of Round Mountain, CA
  3. 1.7 10km S of Shasta, CA
  4. 1.6 17km ESE of Anderson, CA
  5. 1.7 8km N of Shasta, CA
  6. 2.2 14km NE of French Gulch, CA
  7. 1.6 23km SSE of Dunsmuir, CA
  8. 1.8 22km SSE of Dunsmuir, CA
  9. 1.6 7km WSW of Manton, CA
  10. 1.8 12km W of Manton, CA
  11. 1.6 9km NE of Shasta Lake, CA
  12. 1.5 12km SE of Millville, CA
  13. 1.7 13km W of Manton, CA
  14. 1.7 8km NNE of Shasta Lake, CA
  15. 1.6 27km NNE 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.