QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6km SW of Shasta Lake, CA

· 21 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 34 kmTehama County 59 kmTrinity County 60 kmSiskiyou County 106 kmGlenn County 115 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 1.8 (md)
Depth
21 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Shasta County, 34 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1569 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 40.6370, -122.4095. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 34 km (21 mi) WSW of here earthquakes near Shasta County
Tehama County, CA 59 km (37 mi) NNW of here earthquakes near Tehama County
Trinity County, CA 60 km (37 mi) E of here earthquakes near Trinity County
Siskiyou County, CA 106 km (66 mi) S of here earthquakes near Siskiyou County
Glenn County, CA 115 km (71 mi) N of here earthquakes near Glenn County
Butte County, CA 128 km (79 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

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

  1. 2.2 12km NNE of Bella Vista, CA
  2. 1.9 8km ENE of Shasta Lake, CA
  3. 1.8 13km NNE of Bella Vista, CA
  4. 2.1 12km NNE of Bella Vista, CA
  5. 2.0 1km SE of Palo Cedro, CA
  6. 2.5 5km SW of Palo Cedro, CA
  7. 1.7 4km ESE of Redding, CA
  8. 1.7 6km W of Bella Vista, CA
  9. 2.4 17km SE of Anderson, CA
  10. 2.1 24km N of Shasta Lake, CA
  11. 2.1 5km ENE of Shasta, CA
  12. 1.8 5km ENE of Shasta, CA
  13. 1.8 4km SE of Redding, CA
  14. 2.3 25km WNW of Red Bluff, CA
  15. 2.0 13km ESE of Millville, 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.