QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

13km N of McCloud, CA

· 5.6 km deep · released about 360 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Siskiyou County 40 kmShasta County 69 kmTrinity County 115 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 2.7 (md)
Depth
5.6 km below the surface
Felt
19 reports · strongest reported intensity III
Nearest
Siskiyou County, 40 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2579 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 19 people have reported feeling it to USGS.

How big was it?

This earthquake released about 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 30,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.6× the energy of this one
  4. This earthquake M 2.7 about 360 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 41.3760, -122.1390. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Siskiyou County, CA 40 km (25 mi) SE of here earthquakes near Siskiyou County
Shasta County, CA 69 km (43 mi) N of here earthquakes near Shasta County
Trinity County, CA 115 km (72 mi) NE of here earthquakes near Trinity County
Modoc County, CA 121 km (75 mi) W of here earthquakes near Modoc County
Jackson County, OR 123 km (77 mi) SSE of here earthquakes near Jackson County
Josephine County, OR 163 km (102 mi) SE of here earthquakes near Josephine County

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

Aftershocks so far

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

  1. 1.8 21km ENE of McCloud, CA
  2. 1.6 15km SSE of McCloud, CA
  3. 2.2 21km ENE of McCloud, CA
  4. 1.8 13km ENE of Carrick, CA
  5. 2.0 7km ESE of McCloud, CA
  6. 1.6 4km W of Edgewood, CA
  7. 1.5 10km S of McCloud, CA
  8. 2.6 23km SW of Mount Hebron, CA
  9. 2.5 13km SE of Dunsmuir, CA
  10. 1.8 9km E of McCloud, CA
  11. 1.7 14km S of Dunsmuir, CA
  12. 1.7 20km ESE of McCloud, CA
  13. 2.0 18km ESE of McCloud, CA
  14. 1.9 13km S of Dunsmuir, CA
  15. 2.3 16km ESE 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.