QuakeIndex

Earthquake · automatic estimate, may change

M 3.3ml

13 km NNE of Shingletown, CA

· 14 km deep · released about 1.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 25 kmTehama County 63 kmLassen County 103 kmButte County 106 kmTrinity County 108 kmPlumas County 109 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 3.3 (ml)
Depth
14 km below the surface
Felt
27 reports · strongest reported intensity III
Nearest
Shasta County, 25 km NW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 586 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 27 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 120,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,700× the energy of this one
  4. This earthquake M 3.3 about 1.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3× more

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 40.6030, -121.8308. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 25 km (16 mi) SE of here earthquakes near Shasta County
Tehama County, CA 63 km (39 mi) NNE of here earthquakes near Tehama County
Lassen County, CA 103 km (64 mi) W of here earthquakes near Lassen County
Butte County, CA 106 km (66 mi) N of here earthquakes near Butte County
Trinity County, CA 108 km (67 mi) E of here earthquakes near Trinity County
Plumas County, CA 109 km (68 mi) NW of here earthquakes near Plumas County

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

Aftershocks so far

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

  1. 2.2 9 km WSW of Manton, CA
  2. 1.6 13 km SW of Mineral, CA
  3. 2.0 11 km W of Shingletown, CA
  4. 1.8 9 km E of Anderson, CA
  5. 2.3 18 km W of Manton, CA
  6. 1.8 8 km NE of Shasta Lake, CA
  7. 1.6 6 km SSE of Millville, CA
  8. 1.7 8 km NE of Shasta Lake, CA
  9. 2.4 12 km W of Shingletown, CA
  10. 1.8 6 km NNE of Shasta Lake, CA
  11. 1.6 19 km ENE of Red Bluff, CA
  12. 1.7 8 km NE of Shasta Lake, CA
  13. 1.8 9 km NE of Shasta Lake, CA
  14. 2.4 15 km W of Manton, CA
  15. 2.1 11 km WSW of Fall River Mills, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.0 on 2023-09-08 — it released about 320 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.