QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

11km NW of Shasta Lake, CA

· 21 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 36 kmTrinity County 55 kmTehama County 71 kmSiskiyou County 95 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 1.7 (md)
Depth
21 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Shasta County, 36 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1643 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 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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 40.7377, -122.4753. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 36 km (23 mi) W of here earthquakes near Shasta County
Trinity County, CA 55 km (34 mi) E of here earthquakes near Trinity County
Tehama County, CA 71 km (44 mi) NNW of here earthquakes near Tehama County
Siskiyou County, CA 95 km (59 mi) S of here earthquakes near Siskiyou County
Butte County, CA 140 km (87 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

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

  1. 1.7 4km ESE of Redding, CA
  2. 1.7 6km W of Bella Vista, CA
  3. 2.1 24km N of Shasta Lake, CA
  4. 2.1 5km ENE of Shasta, CA
  5. 1.8 5km ENE of Shasta, CA
  6. 1.8 4km SE of Redding, CA
  7. 2.0 13km ESE of Millville, CA
  8. 1.5 2km NNE of Palo Cedro, CA
  9. 1.6 8km SW of Round Mountain, CA
  10. 1.6 3km SSW of Shasta Lake, CA
  11. 1.8 5km WNW of Palo Cedro, CA
  12. 1.6 4km ESE of Bella Vista, CA
  13. 1.8 10km W of Big Bend, CA
  14. 2.2 17km S of Weaverville, CA
  15. 1.9 5km ENE of Shasta, 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.