QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

5 km S of Livermore, California

· 9.1 km deep · released about 67 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alameda County 13 kmContra Costa County 36 kmSanta Clara County 46 kmSan Joaquin County 55 kmSan Mateo County 58 kmStanislaus County 68 kmSanta Cruz County 72 kmSolano County 72 kmMarin County 98 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 2.2 (md)
Depth
9.1 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Alameda County, 13 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3334 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 67 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 160,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 67 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 37.6297, -121.7703. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alameda County, CA 13 km (8 mi) E of here earthquakes near Alameda County
Contra Costa County, CA 36 km (22 mi) SSE of here earthquakes near Contra Costa County
Santa Clara County, CA 46 km (29 mi) N of here earthquakes near Santa Clara County
San Joaquin County, CA 55 km (34 mi) SW of here earthquakes near San Joaquin County
San Mateo County, CA 58 km (36 mi) ENE of here earthquakes near San Mateo County
Stanislaus County, CA 68 km (42 mi) W of here earthquakes near Stanislaus 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. 2.0 8 km NNE of East Foothills, California
  2. 1.8 Northern California
  3. 2.5 9 km NNE of East Foothills, California
  4. 2.7 1 km SE of Pacheco, California
  5. 1.5 15 km E of Seven Trees, California
  6. 1.8 4 km SE of Livermore, California
  7. 2.3 3 km N of East Foothills, California
  8. 2.6 3 km N of East Foothills, California
  9. 2.8 3 km NNE of East Foothills, California
  10. 2.0 3 km N of East Foothills, California
  11. 3.3 3 km NNE of East Foothills, California
  12. 1.8 4 km N of East Foothills, California
  13. 1.7 3 km NNE of Danville, California
  14. 2.6 3 km N of East Foothills, California
  15. 3.3 3 km N of East Foothills, 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.