QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

7 km ENE of Cromberg, California

· 7.3 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 21 kmSierra County 36 kmNevada County 67 kmButte County 88 kmLassen County 92 kmPlacer County 93 kmYuba County 93 kmStorey County 106 kmCarson City 111 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 1.6 (ml)
Depth
7.3 km below the surface
Felt
no reports yet
Nearest
Plumas County, 21 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1951 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 39.8922, -120.6136. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 21 km (13 mi) ESE of here earthquakes near Plumas County
Sierra County, CA 36 km (22 mi) NNW of here earthquakes near Sierra County
Nevada County, CA 67 km (42 mi) NNE of here earthquakes near Nevada County
Butte County, CA 88 km (55 mi) ENE of here earthquakes near Butte County
Lassen County, CA 92 km (57 mi) S of here earthquakes near Lassen County
Placer County, CA 93 km (58 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

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

  1. 2.2 15km WSW of Loyalton, CA
  2. 2.4 16km WSW of Loyalton, CA
  3. 3.3 16km WSW of Loyalton, CA
  4. 2.7 16km WSW of Loyalton, CA
  5. 1.6 2 km WNW of Sierraville, California
  6. 2.1 16km WSW of Loyalton, CA
  7. 2.1 24km SSW of Loyalton, CA
  8. 2.3 10km WNW of Little Grass Valley, CA
  9. 1.5 5km E of Caribou, CA
  10. 1.5 2 km SE of Spring Garden, California
  11. 1.7 2 km SSW of Crescent Mills, California
  12. 1.5 3 km WNW of Sierra City, California
  13. 2.2 9km E of Little Grass Valley, CA
  14. 2.0 3km S of Canyondam, CA
  15. 1.5 1 km ESE of C-Road, 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 4.5 on 2016-08-04 — it released about 21,000 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.