QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

8 km NE of Lake Davis, CA

· 8.3 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 36 kmSierra County 40 kmNevada County 76 kmLassen County 90 kmStorey County 93 kmPlacer County 99 kmCarson City 103 kmButte County 106 kmYuba County 108 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
8.3 km below the surface
Felt
no reports yet
Nearest
Plumas County, 36 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 78 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 180 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 83,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 59,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.2× the energy of this one
  4. This earthquake M 2.5 about 180 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 39.9220, -120.4112. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 36 km (22 mi) ESE of here earthquakes near Plumas County
Sierra County, CA 40 km (25 mi) NNE of here earthquakes near Sierra County
Nevada County, CA 76 km (47 mi) NNE of here earthquakes near Nevada County
Lassen County, CA 90 km (56 mi) SSE of here earthquakes near Lassen County
Storey County, NV 93 km (58 mi) NW of here earthquakes near Storey County
Placer County, CA 99 km (62 mi) NNE of here earthquakes near Placer County

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

Aftershocks so far

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

  1. 1.8 23 km NNW of Chilcoot-Vinton, CA
  2. 2.3 2 km ENE of Keddie, CA
  3. 2.2 9 km S of Johnsville, CA
  4. 2.1 7 km NE of Lake Davis, CA
  5. 2.4 8 km NW of Honey Lake, CA
  6. 2.4 4 km NW of Cold Springs, NV
  7. 2.6 8 km NE of Lake Davis, CA
  8. 2.2 15 km SE of Honey Lake, CA
  9. 2.3 8 km NE of Lake Davis, CA
  10. 2.2 8 km NE of Lake Davis, 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 870 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.