QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

10km SE of Livermore, CA

· 19 km deep · released about 360 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alameda County 20 kmContra Costa County 41 kmSanta Clara County 43 kmSan Joaquin County 52 kmStanislaus County 61 kmSan Mateo County 64 kmSanta Cruz County 72 kmSolano County 76 kmMerced County 97 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 2.7 (md)
Depth
19 km below the surface
Felt
11 reports · strongest reported intensity III
Nearest
Alameda County, 20 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2369 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 11 people have reported feeling it to USGS.

How big was it?

This earthquake released about 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 30,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.6× the energy of this one
  4. This earthquake M 2.7 about 360 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 37.6095, -121.6928. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alameda County, CA 20 km (12 mi) ESE of here earthquakes near Alameda County
Contra Costa County, CA 41 km (26 mi) SSE of here earthquakes near Contra Costa County
Santa Clara County, CA 43 km (27 mi) N of here earthquakes near Santa Clara County
San Joaquin County, CA 52 km (32 mi) SW of here earthquakes near San Joaquin County
Stanislaus County, CA 61 km (38 mi) W of here earthquakes near Stanislaus County
San Mateo County, CA 64 km (40 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

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

  1. 2.0 7km SE of Blackhawk, CA
  2. 1.8 8km ESE of Blackhawk, CA
  3. 1.7 10km SW of Brentwood, CA
  4. 1.7 9km WSW of Mountain House, CA
  5. 2.0 13km ESE of Alum Rock, CA
  6. 1.5 4km NNE of Fairview, CA
  7. 1.5 19km SSE of Livermore, CA
  8. 1.6 2km S of Pittsburg, CA
  9. 2.0 7km NNE of Alum Rock, CA
  10. 1.9 5km NNE of Dublin, CA
  11. 2.5 1km NNE of Diablo, CA
  12. 1.7 1km WSW of Pleasant Hill, CA
  13. 2.3 1km W of Pleasant Hill, CA
  14. 1.8 1km S of San Ramon, CA
  15. 1.7 1km E of Fremont, 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 4.5 on 2019-10-15 — it released about 410 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.