QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8mh

9km SSW of McCloud, CA

· 3.3 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 47 kmSiskiyou County 55 kmTrinity County 99 kmTehama County 117 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 2.8 (mh)
Depth
3.3 km below the surface
Felt
no reports yet
Nearest
Shasta County, 47 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3086 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 41.1743, -122.1613. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 47 km (29 mi) NNW of here earthquakes near Shasta County
Siskiyou County, CA 55 km (34 mi) SE of here earthquakes near Siskiyou County
Trinity County, CA 99 km (62 mi) NE of here earthquakes near Trinity County
Tehama County, CA 117 km (73 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

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

  1. 1.6 16km N of McCloud, CA
  2. 1.6 26km NNE of Shasta Lake, CA
  3. 1.5 9km NE of Shasta Lake, CA
  4. 2.1 20km WSW of Mount Shasta, CA
  5. 1.6 4km WNW of Big Bend, CA
  6. 1.7 9km NE of Shasta Lake, CA
  7. 1.8 5km SW of Big Bend, CA
  8. 1.6 6km ENE of McCloud, CA
  9. 1.6 9km NE of Shasta Lake, CA
  10. 1.7 17km WNW of Round Mountain, CA
  11. 1.7 9km NE of Shasta Lake, CA
  12. 2.1 10km WNW of Dunsmuir, CA
  13. 2.8 7km NW of Montgomery Creek, CA
  14. 1.7 14km NNW of Big Bend, CA
  15. 1.6 21km W of Tennant, 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.