QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

20 km SE of Livermore, California

· 9.2 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alameda County 31 kmSanta Clara County 41 kmSan Joaquin County 48 kmStanislaus County 50 kmContra Costa County 51 kmSan Mateo County 73 kmSanta Cruz County 73 kmSolano County 83 kmMerced County 86 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 1.7 (md)
Depth
9.2 km below the surface
Felt
no reports yet
Nearest
Alameda County, 31 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3509 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 37.5748, -121.5725. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alameda County, CA 31 km (19 mi) ESE of here earthquakes near Alameda County
Santa Clara County, CA 41 km (25 mi) NNE of here earthquakes near Santa Clara County
San Joaquin County, CA 48 km (30 mi) SSW of here earthquakes near San Joaquin County
Stanislaus County, CA 50 km (31 mi) W of here earthquakes near Stanislaus County
Contra Costa County, CA 51 km (32 mi) SE of here earthquakes near Contra Costa County
San Mateo County, CA 73 km (45 mi) ENE of here earthquakes near San Mateo County

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

Aftershocks so far

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

  1. 2.5 6 km NNE of East Foothills, California
  2. 1.8 8 km SE of Livermore, California
  3. 2.1 1 km SSE of Livermore, California
  4. 2.6 2 km SSE of Livermore, California
  5. 1.9 1 km SSE of Livermore, California
  6. 1.8 2 km SSE of Livermore, California
  7. 1.6 1 km SSE of Livermore, California
  8. 1.6 1 km SSE of Livermore, California
  9. 1.6 1 km SSW of Livermore, California
  10. 2.7 2 km SSE of Livermore, California
  11. 2.1 2 km SSE of Livermore, California
  12. 1.5 12km SSE of Livermore, CA
  13. 2.5 13 km N of Morgan Hill, California
  14. 1.5 11 km SSE of Livermore, California
  15. 2.0 1 km NE of Diablo, 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.

On USGS

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