QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

6km SSE of Bridgeport, CA

· 10 km deep · released about 920 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 44 kmAlpine County 69 kmTuolumne County 69 kmMineral County 77 kmDouglas County 85 kmLyon County 91 kmMariposa County 94 kmCarson City 115 kmCalaveras 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 3.0 (ml)
Depth
10 km below the surface
Felt
7 reports · strongest reported intensity III
Nearest
Mono County, 44 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1263 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 920 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 370,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 920 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 38.2083, -119.2108. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 44 km (27 mi) NW of here earthquakes near Mono County
Alpine County, CA 69 km (43 mi) SE of here earthquakes near Alpine County
Tuolumne County, CA 69 km (43 mi) ENE of here earthquakes near Tuolumne County
Mineral County, NV 77 km (48 mi) WSW of here earthquakes near Mineral County
Douglas County, NV 85 km (53 mi) SSE of here earthquakes near Douglas County
Lyon County, NV 91 km (56 mi) S of here earthquakes near Lyon County

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

Aftershocks so far

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

  1. 2.5 5 km NNW of Walker, CA
  2. 1.5 0 km E of Coleville, California
  3. 2.0 30 km SW of Hawthorne, Nevada
  4. 3.6 6 km NNW of Walker, CA
  5. 1.5 2 km SSW of Coleville, California
  6. 1.8 33 km SSW of Hawthorne, Nevada
  7. 2.3 6 km WNW of Walker, CA
  8. 2.3 5 km SW of Walker, CA
  9. 2.3 3 km WSW of Walker, CA
  10. 2.8 4 km WSW of Walker, CA
  11. 1.5 4 km WNW of Walker, California
  12. 1.6 29 km SE of Bodie, CA
  13. 1.6 California-Nevada border region
  14. 3.1 7 km WNW of Walker, CA
  15. 1.8 20 km SE of Bodie, 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 6.0 on 2021-07-08 — it released about 33,000 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.