QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

7 km SSW of Livermore, CA

· 11 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alameda County 11 kmContra Costa County 36 kmSanta Clara County 46 kmSan Mateo County 56 kmSan Joaquin County 57 kmStanislaus County 70 kmSanta Cruz County 71 kmSolano County 73 kmMarin County 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 1.7 (md)
Depth
11 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Alameda County, 11 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 233 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 11 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 37.6245, -121.7915. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alameda County, CA 11 km (7 mi) ESE 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 (28 mi) NNW of here earthquakes near Santa Clara County
San Mateo County, CA 56 km (35 mi) ENE of here earthquakes near San Mateo County
San Joaquin County, CA 57 km (36 mi) SW of here earthquakes near San Joaquin County
Stanislaus County, CA 70 km (43 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

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

  1. 1.6 4 km ESE of San Ramon, CA
  2. 2.3 5 km N of Dublin, CA
  3. 1.8 5 km N of Dublin, CA
  4. 1.7 5 km SE of San Ramon, CA
  5. 1.6 5 km SE of San Ramon, CA
  6. 2.5 4 km ESE of San Ramon, CA
  7. 2.5 4 km ESE of San Ramon, CA
  8. 2.2 4 km ESE of San Ramon, CA
  9. 1.6 4 km ESE of San Ramon, CA
  10. 2.2 4 km SE of San Ramon, CA
  11. 1.9 28 km WSW of Westley, CA
  12. 1.9 5 km ESE of San Ramon, CA
  13. 2.8 4 km ESE of San Ramon, CA
  14. 2.6 5 km SE of San Ramon, CA
  15. 2.8 4 km ESE of San Ramon, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.1 on 2022-10-25 — it released about 100,000 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.