QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

3km W of Pittsburg, CA

· 19 km deep · released about 31 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Contra Costa County 13 kmSolano County 26 kmAlameda County 43 kmSan Joaquin County 58 kmNapa County 64 kmSacramento County 68 kmYolo County 72 kmMarin County 72 kmSan Mateo County 79 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 2.0 (md)
Depth
19 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Contra Costa County, 13 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3057 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 31 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 480,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 340,000× the energy of this one
  3. Around the size people start to feel M 3.0 31× the energy of this one
  4. This earthquake M 2.0 about 31 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 38.0328, -121.9197. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Contra Costa County, CA 13 km (8 mi) NNE of here earthquakes near Contra Costa County
Solano County, CA 26 km (16 mi) S of here earthquakes near Solano County
Alameda County, CA 43 km (27 mi) N of here earthquakes near Alameda County
San Joaquin County, CA 58 km (36 mi) W of here earthquakes near San Joaquin County
Napa County, CA 64 km (39 mi) SE of here earthquakes near Napa County
Sacramento County, CA 68 km (42 mi) SW of here earthquakes near Sacramento County

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

Aftershocks so far

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

  1. 1.7 2km SW of Concord, CA
  2. 2.1 2km SSW of Dublin, CA
  3. 2.3 5km ESE of Blackhawk, CA
  4. 2.2 10km NNE of Livermore, CA
  5. 2.6 2km W of Concord, CA
  6. 1.8 4km SW of Livermore, CA
  7. 1.6 9km NNE of Livermore, CA
  8. 1.6 3km N of Piedmont, CA
  9. 2.9 12km SE of Suisun City, CA
  10. 2.2 11km NE of Napa, CA
  11. 2.9 15km ESE of Suisun City, CA
  12. 2.2 8km SE of Suisun City, CA
  13. 1.9 10km ESE of Black Point-Green Point, CA
  14. 3.7 10km ESE of Black Point-Green Point, CA
  15. 1.8 8km SE of Suisun City, 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 4.4 on 2018-01-04 — it released about 3,600 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.