QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

14 km NW of Bridgeport, California

· 0.6 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 49 kmTuolumne County 63 kmMono County 64 kmDouglas County 66 kmLyon County 77 kmMineral County 85 kmCarson City 96 kmMariposa County 98 kmCalaveras County 105 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 1.8 (md)
Depth
0.6 km below the surface
Felt
no reports yet
Nearest
Alpine County, 49 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3009 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 38.3390, -119.3647. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alpine County, CA 49 km (31 mi) SE of here earthquakes near Alpine County
Tuolumne County, CA 63 km (39 mi) NE of here earthquakes near Tuolumne County
Mono County, CA 64 km (40 mi) NW of here earthquakes near Mono County
Douglas County, NV 66 km (41 mi) SSE of here earthquakes near Douglas County
Lyon County, NV 77 km (48 mi) S of here earthquakes near Lyon County
Mineral County, NV 85 km (53 mi) WSW of here earthquakes near Mineral County

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

Aftershocks so far

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

  1. 2.0 28 km SW of Hawthorne, Nevada
  2. 3.1 30 km SW of Hawthorne, Nevada
  3. 3.0 29 km WSW of Hawthorne, Nevada
  4. 2.4 28 km WSW of Hawthorne, Nevada
  5. 2.4 27 km ENE of Bridgeport, California
  6. 3.0 29 km ENE of Bridgeport, California
  7. 2.6 28 km WSW of Hawthorne, Nevada
  8. 2.8 28 km WSW of Hawthorne, Nevada
  9. 5.5 28 km SW of Hawthorne, Nevada
  10. 2.3 29 km ENE of Bridgeport, California
  11. 2.9 28 km WSW of Hawthorne, Nevada
  12. 1.8 28 km WSW of Hawthorne, Nevada
  13. 3.2 29 km SW of Hawthorne, Nevada
  14. 2.2 28 km WSW of Hawthorne, Nevada
  15. 1.9 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.

On USGS

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