QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

2 km ESE of Berkeley, California

· 9.4 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Contra Costa County 27 kmAlameda County 38 kmMarin County 48 kmSan Mateo County 51 kmSolano County 52 kmSan Francisco County 70 kmNapa County 72 kmSan Joaquin County 86 kmSanta Clara County 87 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 2.6 (md)
Depth
9.4 km below the surface
Felt
90 reports · strongest reported intensity IV
Nearest
Contra Costa County, 27 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3288 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 90 people have reported feeling it to USGS.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 37.8643, -122.2493. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Contra Costa County, CA 27 km (17 mi) WSW of here earthquakes near Contra Costa County
Alameda County, CA 38 km (24 mi) NW of here earthquakes near Alameda County
Marin County, CA 48 km (30 mi) ESE of here earthquakes near Marin County
San Mateo County, CA 51 km (32 mi) NNE of here earthquakes near San Mateo County
Solano County, CA 52 km (33 mi) SSW of here earthquakes near Solano County
San Francisco County, CA 70 km (44 mi) ENE of here earthquakes near San Francisco County

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

Aftershocks so far

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

  1. 2.3 2km NW of Pittsburg, CA
  2. 1.6 5km NNW of Pacifica, CA
  3. 2.2 5km NNW of Pacifica, CA
  4. 2.1 2km ENE of Berkeley, CA
  5. 1.6 2km E of Diablo, CA
  6. 1.6 6km ENE of Dublin, CA
  7. 1.6 6km ENE of El Granada, CA
  8. 2.6 2km NNE of San Leandro, CA
  9. 1.7 5km NNE of San Leandro, CA
  10. 2.4 1km E of Pacheco, CA
  11. 1.7 1 km N of North Fair Oaks, California
  12. 1.6 2 km NNW of Pleasant Hill, California
  13. 1.6 11 km S of Muir Beach, California
  14. 2.3 1 km E of Pacheco, California
  15. 2.3 2 km SSE of Dublin, 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.