QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

Earthquake near Crockett, CA

No earthquake was likely felt in Crockett in the 24 hours to 11:02 pm PST (07:02 UTC). The last one was M 1.8, 10 km (6 mi) NNE, at 11:09 am PST on 4 November 2026, estimated intensity II (weak) in town. Every earthquake near Crockett

This page: a magnitude 2.0 earthquake was recorded in Crockett, CA, at 10:27 am PDT on 11 June 2020 (17:27 UTC), 7.1 km deep. 8 people have reported feeling it to USGS.

USGS: 2km NNW of Crockett, CA

6 km (4 mi) SE of Vallejo, CA · 36 km (23 mi) NNE of San Francisco, CA

10:27 am PDT, Jun 11, 2020 · · 7.1 km deep · released about 27 lb of TNT

Every earthquake near Crockett Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Contra Costa County 29 kmSolano County 33 kmMarin County 46 kmNapa County 50 kmAlameda County 54 kmYolo County 74 kmSan Mateo County 74 kmSonoma County 80 kmSan Francisco County 81 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
10:27 am PDT on 11 June 2020 ()
Where
in Crockett, CA · earthquakes near Crockett
Magnitude
M 2.0 (md)
Depth
7.1 km below the surface
Felt
8 reports · strongest reported intensity III
Nearest
Contra Costa County, 29 km SE
Nearest mapped fault
Green Valley fault, 11 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2344 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 14 km (9 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Crockett in town, intensity II · Vallejo 5 km, intensity II · Benicia 6 km, intensity II · Hercules 8 km, intensity II · Martinez 9 km, intensity II · Pinole 10 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 27 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 5.8 560,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 390,000× the energy of this one
  3. Around the size people start to feel M 3.0 35× the energy of this one
  4. This earthquake M 2.0 about 27 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.5 on 2019-10-15 — about 5,400 times the energy of this one.

Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:

  1. 7.9 The 1906 San Francisco, California Earthquake · 46 km SW of this epicentre
  2. 6.0 The 2014 South Napa, California Earthquake · 18 km NNW of this epicentre
  3. 5.8 The 1980 Livermore, California Earthquake · 47 km ESE of this epicentre
  4. 5.4 South of Elmira, California · 38 km NE of this epicentre
  5. 5.1 11 km E of Blackhawk, California · 48 km SE of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 38.0670, -122.2205. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Contra Costa County, CA 29 km (18 mi) SE earthquakes near Contra Costa County
Solano County, CA 33 km (21 mi) NE earthquakes near Solano County
Marin County, CA 46 km (29 mi) W earthquakes near Marin County
Napa County, CA 50 km (31 mi) N earthquakes near Napa County
Alameda County, CA 54 km (34 mi) SSE earthquakes near Alameda County
Yolo County, CA 74 km (46 mi) NNE earthquakes near Yolo County

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

Aftershocks so far

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

  1. 1.7 6km SW of Yountville, CA
  2. 2.1 6km SSW of Yountville, CA
  3. 1.6 6km ESE of Santa Venetia, CA
  4. 1.8 5km NNE of Black Point-Green Point, CA
  5. 1.5 4km SSE of Brentwood, CA
  6. 1.7 2km SW of Clayton, CA
  7. 1.7 6km W of Brentwood, CA
  8. 2.3 3km ENE of San Ramon, CA
  9. 2.5 2km ENE of San Leandro, CA
  10. 2.6 2km ENE of Pleasant Hill, CA
  11. 2.3 6km W of Glen Ellen, CA
  12. 2.4 2km E of Berkeley, CA
  13. 2.6 4km ESE of Berkeley, CA
  14. 2.1 4km ESE of Berkeley, CA
  15. 1.7 1km SW of Diablo, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.