QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

8km WNW of Lake Davis, CA

· 9.4 km deep · released about 420 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 25 kmSierra County 37 kmNevada County 71 kmLassen County 90 kmButte County 94 kmPlacer County 95 kmYuba County 98 kmStorey County 103 kmCarson City 109 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 2.8 (md)
Depth
9.4 km below the surface
Felt
17 reports · strongest reported intensity III
Nearest
Plumas County, 25 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2339 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 17 people have reported feeling it to USGS.

How big was it?

This earthquake released about 420 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 36,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 26,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.3× the energy of this one
  4. This earthquake M 2.8 about 420 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 39.9102, -120.5558. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 25 km (15 mi) ESE of here earthquakes near Plumas County
Sierra County, CA 37 km (23 mi) N of here earthquakes near Sierra County
Nevada County, CA 71 km (44 mi) NNE of here earthquakes near Nevada County
Lassen County, CA 90 km (56 mi) S of here earthquakes near Lassen County
Butte County, CA 94 km (58 mi) ENE of here earthquakes near Butte County
Placer County, CA 95 km (59 mi) N of here earthquakes near Placer County

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

Aftershocks so far

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

  1. 2.0 3km WSW of Whitehawk, CA
  2. 1.7 2 km ENE of East Quincy, California
  3. 1.8 3 km SSE of Sattley, California
  4. 2.1 18km WSW of Loyalton, CA
  5. 2.7 10km SSE of Beckwourth, CA
  6. 2.0 16km SW of Loyalton, CA
  7. 2.0 6km N of Greenhorn, CA
  8. 1.8 3km N of Spring Garden, CA
  9. 2.4 1km NE of Twain, CA
  10. 1.5 4km N of Twain, CA
  11. 1.6 3km NW of Greenville, CA
  12. 1.5 7km NW of Indian Falls, CA
  13. 2.5 5km NNE of East Quincy, CA
  14. 1.9 5km NE of Greenhorn, CA
  15. 2.5 4km NE of Greenhorn, 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 380 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.