QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

8 km NE of McCloud, CA

· 9.8 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Siskiyou County 48 kmShasta County 62 kmTrinity County 114 kmModoc County 118 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
9.8 km below the surface
Felt
no reports yet
Nearest
Siskiyou County, 48 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 746 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 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× 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 41.3167, -122.0827. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Siskiyou County, CA 48 km (30 mi) SE of here earthquakes near Siskiyou County
Shasta County, CA 62 km (38 mi) N of here earthquakes near Shasta County
Trinity County, CA 114 km (71 mi) NE of here earthquakes near Trinity County
Modoc County, CA 118 km (73 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

47 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. 1.8 14 km NNE of McCloud, CA
  4. 1.5 29 km N of Shasta Lake, CA
  5. 1.6 12 km N of McCloud, CA
  6. 2.1 13 km N of McCloud, CA
  7. 1.6 25 km NW of McArthur, CA
  8. 2.0 24 km WSW of Big Bend, CA
  9. 1.7 13 km NNE of McCloud, CA
  10. 1.9 3 km WNW of Mount Shasta, CA
  11. 2.0 30 km N of Shasta Lake, CA
  12. 1.8 15 km NW of Big Bend, CA
  13. 1.9 24 km E of Tennant, CA
  14. 2.1 13 km SSE of Tennant, CA
  15. 1.8 14 km NNE of McCloud, 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.