QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

24km N of Shasta Lake, CA

· 15 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 31 kmTrinity County 69 kmSiskiyou County 78 kmTehama County 86 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
15 km below the surface
Felt
no reports yet
Nearest
Shasta County, 31 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1567 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 11 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 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 40.8953, -122.3652. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 31 km (19 mi) WNW of here earthquakes near Shasta County
Trinity County, CA 69 km (43 mi) ENE of here earthquakes near Trinity County
Siskiyou County, CA 78 km (49 mi) S of here earthquakes near Siskiyou County
Tehama County, CA 86 km (54 mi) N of here earthquakes near Tehama County

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

Aftershocks so far

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

  1. 2.5 17km SSE of Dunsmuir, CA
  2. 2.0 11km NW of Shasta Lake, CA
  3. 1.6 24km WSW of Big Bend, CA
  4. 1.8 5km NNE of Montgomery Creek, CA
  5. 1.5 3km NE of Shasta Lake, CA
  6. 1.8 9km NE of Shasta Lake, CA
  7. 2.1 13km S of Dunsmuir, CA
  8. 2.2 12km NNE of Bella Vista, CA
  9. 2.1 8km ENE of Montgomery Creek, CA
  10. 1.9 8km ENE of Shasta Lake, CA
  11. 1.8 13km NNE of Bella Vista, CA
  12. 2.1 12km NNE of Bella Vista, CA
  13. 2.0 1km SE of Palo Cedro, CA
  14. 2.5 5km SW of Palo Cedro, CA
  15. 1.7 4km ESE of Redding, 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.