QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

23km WNW of Bridgeport, CA

· 8.5 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 44 kmTuolumne County 53 kmDouglas County 66 kmMono County 69 kmLyon County 82 kmMariposa County 91 kmCalaveras County 95 kmMineral County 96 kmCarson City 96 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
8.5 km below the surface
Felt
no reports yet
Nearest
Alpine County, 44 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2939 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 19 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 5.8 790,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 560,000× the energy of this one
  3. Around the size people start to feel M 3.0 50× the energy of this one
  4. This earthquake M 1.9 about 19 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 38.3175, -119.4838. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alpine County, CA 44 km (27 mi) SE of here earthquakes near Alpine County
Tuolumne County, CA 53 km (33 mi) NE of here earthquakes near Tuolumne County
Douglas County, NV 66 km (41 mi) S of here earthquakes near Douglas County
Mono County, CA 69 km (43 mi) NW of here earthquakes near Mono County
Lyon County, NV 82 km (51 mi) SSW of here earthquakes near Lyon County
Mariposa County, CA 91 km (56 mi) NNE of here earthquakes near Mariposa County

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

Aftershocks so far

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

  1. 1.6 4 km SE of Walker, California
  2. 1.9 6 km SE of Walker, California
  3. 1.8 6 km ESE of Walker, California
  4. 1.9 7km W of Bodie, CA
  5. 1.5 9 km ESE of Markleeville, California
  6. 1.6 12 km ENE of Bridgeport, California
  7. 1.5 5 km ESE of Topaz Lake, Nevada
  8. 1.6 5 km SSE of Topaz Ranch Estates, Nevada
  9. 2.3 7km SSW of Markleeville, CA
  10. 1.9 6 km SSW of Topaz Lake, Nevada
  11. 1.9 18km W of Bridgeport, CA
  12. 2.1 12km NNW of Bridgeport, CA
  13. 3.2 12km NNW of Bridgeport, CA
  14. 3.5 12km NNW of Bridgeport, CA
  15. 1.6 8km NE of Lee Vining, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.