QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

4km WSW of Big Bend, CA

· 14 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 28 kmSiskiyou County 82 kmTehama County 100 kmTrinity County 105 kmLassen County 116 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
14 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Shasta County, 28 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2867 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 7.8 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 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 40.9993, -121.9512. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 28 km (17 mi) NNE of here earthquakes near Shasta County
Siskiyou County, CA 82 km (51 mi) SE of here earthquakes near Siskiyou County
Tehama County, CA 100 km (62 mi) NNE of here earthquakes near Tehama County
Trinity County, CA 105 km (66 mi) ENE of here earthquakes near Trinity County
Lassen County, CA 116 km (72 mi) WNW of here earthquakes near Lassen County
Modoc County, CA 122 km (76 mi) WSW of here earthquakes near Modoc 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. 1.6 22km SE of Burney, CA
  2. 1.9 22km SE of Burney, CA
  3. 2.4 22km SE of Burney, CA
  4. 1.6 22km SE of Burney, CA
  5. 1.7 21km SE of Burney, CA
  6. 1.6 22km SE of Burney, CA
  7. 3.0 21km SE of Burney, CA
  8. 2.4 21km SE of Burney, CA
  9. 1.9 22km SE of Burney, CA
  10. 2.0 8km WSW of Dunsmuir, CA
  11. 1.8 9km NNE of Shasta Lake, CA
  12. 1.6 12km W of Fall River Mills, CA
  13. 1.8 18km NW of Viola, CA
  14. 1.8 17km NNE of Bella Vista, CA
  15. 1.6 18km NW of Viola, 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.