QuakeIndex

Earthquake · automatic estimate, may change

M 1.5ml

12 km NW of Bridgeport, California

· 13 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 52 kmMono County 61 kmDouglas County 67 kmTuolumne County 67 kmLyon County 76 kmMineral County 80 kmCarson City 97 kmMariposa County 101 kmCalaveras County 110 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 1.5 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Alpine County, 52 km NW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 1374 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 38.3474, -119.3140. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alpine County, CA 52 km (32 mi) SE of here earthquakes near Alpine County
Mono County, CA 61 km (38 mi) NW of here earthquakes near Mono County
Douglas County, NV 67 km (42 mi) SSE of here earthquakes near Douglas County
Tuolumne County, CA 67 km (42 mi) ENE of here earthquakes near Tuolumne County
Lyon County, NV 76 km (47 mi) S of here earthquakes near Lyon County
Mineral County, NV 80 km (50 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

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

  1. 1.5 12 km ENE of Bridgeport, California
  2. 2.3 13km SW of Walker, CA
  3. 2.4 16km NW of Walker, CA
  4. 2.8 28 km WSW of Hawthorne, Nevada
  5. 1.5 24 km E of Mono City, California
  6. 1.8 27 km WSW of Hawthorne, Nevada
  7. 1.5 5 km SW of Coleville, California
  8. 2.2 7km WNW of Walker, CA
  9. 2.3 5km WNW of Walker, CA
  10. 2.1 5km WNW of Walker, CA
  11. 2.5 30 km ENE of Bridgeport, California
  12. 2.9 5km W of Walker, CA
  13. 2.5 3km WNW of Walker, CA
  14. 2.7 1km WNW of Walker, CA
  15. 2.1 5 km WSW of Walker, California

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 5,600,000 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.