QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

44 km E of Fort Bidwell, California

· 4.9 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Modoc County 97 kmLake 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 (ml)
Depth
4.9 km below the surface
Felt
no reports yet
Nearest
Modoc County, 97 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 458 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 41.9019, -119.6207. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Modoc County, CA 97 km (60 mi) ENE of here earthquakes near Modoc County
Lake County, OR 117 km (73 mi) SSE of here earthquakes near Lake County

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

Aftershocks so far

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

  1. 1.6 47 km E of Fort Bidwell, California
  2. 1.9 23 km NE of Fort Bidwell, California
  3. 2.0 23 km NE of Fort Bidwell, California
  4. 1.8 23 km NE of Fort Bidwell, California
  5. 1.8 24 km NE of Fort Bidwell, California
  6. 1.6 22 km NE of Fort Bidwell, California
  7. 1.7 22 km NE of Fort Bidwell, California
  8. 1.7 49 km E of Fort Bidwell, California
  9. 1.8 44 km ENE of Fort Bidwell, California
  10. 2.4 48 km E of Fort Bidwell, California
  11. 2.1 40 km E of Fort Bidwell, California
  12. 2.0 45 km E of Fort Bidwell, California
  13. 2.3 42 km ESE of Fort Bidwell, California
  14. 1.5 42 km E of Fort Bidwell, California
  15. 1.6 45 km E of Fort Bidwell, California

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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.1 on 2016-01-03 — it released about 1,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.