QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

21 km NE of Lake Davis, CA

· -1.5 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 44 kmSierra County 51 kmLassen County 83 kmNevada County 88 kmStorey County 92 kmWashoe County 97 kmCarson City 106 kmPlacer County 111 kmButte 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 2.5 (md)
Depth
-1.5 km below the surface
Felt
no reports yet
Nearest
Plumas County, 44 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 149 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 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 40.0045, -120.3055. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 44 km (27 mi) E of here earthquakes near Plumas County
Sierra County, CA 51 km (32 mi) NNE of here earthquakes near Sierra County
Lassen County, CA 83 km (52 mi) SSE of here earthquakes near Lassen County
Nevada County, CA 88 km (55 mi) NNE of here earthquakes near Nevada County
Storey County, NV 92 km (57 mi) NW of here earthquakes near Storey County
Washoe County, NV 97 km (61 mi) SW of here earthquakes near Washoe County

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

Aftershocks so far

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

  1. 1.8 23 km NNW of Chilcoot-Vinton, CA
  2. 2.2 9 km S of Johnsville, CA
  3. 2.1 7 km NE of Lake Davis, CA
  4. 2.4 8 km NW of Honey Lake, CA
  5. 2.4 4 km NW of Cold Springs, NV
  6. 2.6 8 km NE of Lake Davis, CA
  7. 2.2 15 km SE of Honey Lake, CA
  8. 2.3 8 km NE of Lake Davis, CA
  9. 2.2 8 km NE of Lake Davis, CA
  10. 2.2 24 km ENE of Honey Lake, CA
  11. 2.0 5 km SSW of Cromberg, CA
  12. 3.0 4 km WSW of Johnsville, CA
  13. 2.4 5 km NW of Johnsville, CA
  14. 2.1 8 km NE of Lake Davis, CA
  15. 2.2 8 km NE of Lake Davis, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2016-08-04 — it released about 930 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.