QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

28 km ENE of Bridgeport, California

· 7.8 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 47 kmMineral County 48 kmLyon County 79 kmAlpine County 83 kmDouglas County 87 kmTuolumne County 98 kmCarson City 115 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 3.1 (ml)
Depth
7.8 km below the surface
Felt
19 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Mono County, 47 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3009 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 19 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

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 38.3411, -118.9191. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 47 km (29 mi) N of here earthquakes near Mono County
Mineral County, NV 48 km (30 mi) WSW of here earthquakes near Mineral County
Lyon County, NV 79 km (49 mi) SSE of here earthquakes near Lyon County
Alpine County, CA 83 km (51 mi) ESE of here earthquakes near Alpine County
Douglas County, NV 87 km (54 mi) SE of here earthquakes near Douglas County
Tuolumne County, CA 98 km (61 mi) ENE of here earthquakes near Tuolumne 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. 2.6 30 km SW of Hawthorne, Nevada
  2. 2.0 28 km WSW of Hawthorne, Nevada
  3. 3.5 28 km WSW of Hawthorne, Nevada
  4. 2.2 33 km SSW of Hawthorne, Nevada
  5. 3.9 28 km WSW of Hawthorne, Nevada
  6. 2.8 28 km WSW of Hawthorne, Nevada
  7. 2.0 27 km SW of Hawthorne, Nevada
  8. 1.8 29 km WSW of Hawthorne, Nevada
  9. 1.5 33 km SSW of Hawthorne, Nevada
  10. 2.1 29 km SW of Hawthorne, Nevada
  11. 1.5 29 km SW of Hawthorne, Nevada
  12. 2.3 30 km SW of Hawthorne, Nevada
  13. 2.5 29 km SW of Hawthorne, Nevada
  14. 1.9 30 km SW of Hawthorne, Nevada
  15. 1.5 27 km WSW of Hawthorne, Nevada

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 5.6 on 2016-12-28 — it released about 5,600 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.