QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

20 km W of Big Bend, CA

· 13 km deep · released about 9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 33 kmSiskiyou County 68 kmTrinity County 93 kmTehama County 103 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
13 km below the surface
Felt
no reports yet
Nearest
Shasta County, 33 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 318 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 41.0480, -122.1450. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 33 km (21 mi) NNW of here earthquakes near Shasta County
Siskiyou County, CA 68 km (42 mi) SSE of here earthquakes near Siskiyou County
Trinity County, CA 93 km (58 mi) ENE of here earthquakes near Trinity County
Tehama County, CA 103 km (64 mi) N of here earthquakes near Tehama County
Modoc County, CA 134 km (83 mi) WSW of here earthquakes near Modoc County
Plumas County, CA 162 km (101 mi) NW of here earthquakes near Plumas County

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

Aftershocks so far

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

  1. 2.0 13 km SSW of Tennant, CA
  2. 1.7 21 km NE of Big Bend, CA
  3. 1.9 4 km ESE of Bella Vista, CA
  4. 1.8 14 km NNE of McCloud, CA
  5. 1.5 29 km N of Shasta Lake, CA
  6. 1.6 12 km N of McCloud, CA
  7. 1.6 7 km NNE of Burney, CA
  8. 1.7 20 km NNE of Shasta Lake, CA
  9. 2.1 13 km N of McCloud, CA
  10. 2.0 24 km WSW of Big Bend, CA
  11. 1.7 13 km NNE of McCloud, CA
  12. 1.9 3 km WNW of Mount Shasta, CA
  13. 2.0 4 km S of Burney, CA
  14. 2.2 4 km S of Burney, CA
  15. 1.9 4 km S of Burney, 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.