QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

8km NNE of Bridgeport, CA

· 9.0 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 52 kmAlpine County 63 kmMineral County 71 kmDouglas County 75 kmTuolumne County 75 kmLyon County 79 kmMariposa County 104 kmCarson City 105 kmCalaveras County 120 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 1.9 (md)
Depth
9.0 km below the surface
Felt
no reports yet
Nearest
Mono County, 52 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1746 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 20 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 38.3160, -119.1893. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 52 km (32 mi) NNW of here earthquakes near Mono County
Alpine County, CA 63 km (39 mi) ESE of here earthquakes near Alpine County
Mineral County, NV 71 km (44 mi) WSW of here earthquakes near Mineral County
Douglas County, NV 75 km (47 mi) SSE of here earthquakes near Douglas County
Tuolumne County, CA 75 km (47 mi) ENE of here earthquakes near Tuolumne County
Lyon County, NV 79 km (49 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

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

  1. 2.2 6km WNW of Walker, CA
  2. 2.3 29km ESE of Bodie, CA
  3. 2.2 5km WNW of Walker, CA
  4. 1.6 27km ESE of Bodie, CA
  5. 1.8 5km SW of Walker, CA
  6. 2.2 6km WNW of Walker, CA
  7. 1.5 17 km ENE of Coleville, California
  8. 1.5 5 km SW of Walker, California
  9. 2.3 8km E of Walker, CA
  10. 2.2 5km WNW of Walker, CA
  11. 2.2 29km ESE of Bodie, CA
  12. 1.5 8 km ENE of Walker, California
  13. 1.8 27km ESE of Bodie, CA
  14. 2.3 7km WNW of Walker, CA
  15. 1.7 7km WNW of Walker, 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 1,500,000 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.