QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

12km SSW of Tennant, CA

· 12 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Siskiyou County 48 kmShasta County 80 kmModoc County 105 kmJackson County 119 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
12 km below the surface
Felt
no reports yet
Nearest
Siskiyou County, 48 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1523 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 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× 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 41.4815, -121.9695. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Siskiyou County, CA 48 km (30 mi) ESE of here earthquakes near Siskiyou County
Shasta County, CA 80 km (50 mi) N of here earthquakes near Shasta County
Modoc County, CA 105 km (65 mi) W of here earthquakes near Modoc County
Jackson County, OR 119 km (74 mi) SSE of here earthquakes near Jackson County
Trinity County, CA 133 km (83 mi) NE of here earthquakes near Trinity County
Lassen County, CA 141 km (88 mi) NW of here earthquakes near Lassen 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. 2.6 23 km WSW of Mount Hebron, CA
  2. 1.8 12 km SE of Dunsmuir, CA
  3. 2.0 12 km SE of Dunsmuir, CA
  4. 2.1 4 km SW of Tennant, CA
  5. 1.6 4 km SW of Tennant, CA
  6. 1.8 13 km NNE of McCloud, CA
  7. 1.9 12 km NNE of McCloud, CA
  8. 1.7 9 km S of McCloud, CA
  9. 1.8 34 km SSE of Tennant, CA
  10. 2.0 15 km NNE of Big Bend, CA
  11. 2.3 10 km S of McCloud, CA
  12. 2.3 10 km SSW of McCloud, CA
  13. 1.9 12 km NNE of McCloud, CA
  14. 1.9 7 km ENE of McCloud, CA
  15. 1.6 16 km SE of Dunsmuir, 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.