QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

26 km NNE of Shasta Lake, CA

· 15 km deep · released about 9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 27 kmTrinity County 75 kmSiskiyou County 78 kmTehama County 87 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 1.6 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Shasta County, 27 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 371 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 9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 9 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 40.9107, -122.2975. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 27 km (17 mi) NW of here earthquakes near Shasta County
Trinity County, CA 75 km (46 mi) ENE of here earthquakes near Trinity County
Siskiyou County, CA 78 km (48 mi) SSE of here earthquakes near Siskiyou County
Tehama County, CA 87 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

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

  1. 1.9 4 km ESE of Bella Vista, CA
  2. 1.5 29 km N of Shasta Lake, CA
  3. 1.7 20 km NNE of Shasta Lake, CA
  4. 2.0 24 km WSW of Big Bend, CA
  5. 1.9 3 km WNW of Mount Shasta, CA
  6. 2.0 5 km SW of Shasta Lake, CA
  7. 1.9 3 km ESE of Bella Vista, CA
  8. 2.2 3 km SW of Shasta Lake, CA
  9. 1.9 2 km NNE of Palo Cedro, CA
  10. 2.1 1 km ESE of Palo Cedro, CA
  11. 1.9 2 km ENE of Palo Cedro, CA
  12. 1.9 1 km ENE of Palo Cedro, CA
  13. 1.9 3 km S of Palo Cedro, CA
  14. 2.4 8 km SSW of French Gulch, CA
  15. 1.9 5 km WNW 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.