QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

0km NE of Etna, CA

· 14 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Siskiyou County 33 kmTrinity County 92 kmDel Norte County 96 kmShasta County 105 kmJackson County 107 kmJosephine 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 2.1 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Siskiyou County, 33 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1962 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 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 41.4603, -122.8918. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Siskiyou County, CA 33 km (21 mi) WSW of here earthquakes near Siskiyou County
Trinity County, CA 92 km (57 mi) NNE of here earthquakes near Trinity County
Del Norte County, CA 96 km (60 mi) ESE of here earthquakes near Del Norte County
Shasta County, CA 105 km (65 mi) NW of here earthquakes near Shasta County
Jackson County, OR 107 km (67 mi) S of here earthquakes near Jackson County
Josephine County, OR 117 km (73 mi) SSE of here earthquakes near Josephine County

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

Aftershocks so far

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

  1. 1.9 3 km WNW of Mount Shasta, CA
  2. 2.6 30 km ESE of Somes Bar, CA
  3. 2.5 24 km SSE of Somes Bar, CA
  4. 2.6 21 km SSE of Somes Bar, CA
  5. 2.6 21 km SSE of Somes Bar, CA
  6. 2.5 17km SSE of Somes Bar, CA
  7. 1.8 2km SE of Grenada, CA
  8. 1.7 9km ESE of Grenada, CA
  9. 2.5 16km SSE of Somes Bar, 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.