QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

22km S of South Dos Palos, CA

· 2.2 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 38 kmMerced County 47 kmMonterey County 80 kmStanislaus County 92 kmFresno County 93 kmMadera County 98 kmSanta Clara County 101 kmKings County 111 kmMariposa County 114 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 2.1 (md)
Depth
2.2 km below the surface
Felt
no reports yet
Nearest
San Benito County, 38 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2028 days ago

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

How big was it?

This earthquake released about 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 36.7687, -120.7012. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 38 km (24 mi) ENE of here earthquakes near San Benito County
Merced County, CA 47 km (29 mi) S of here earthquakes near Merced County
Monterey County, CA 80 km (50 mi) NE of here earthquakes near Monterey County
Stanislaus County, CA 92 km (57 mi) SSE of here earthquakes near Stanislaus County
Fresno County, CA 93 km (58 mi) W of here earthquakes near Fresno County
Madera County, CA 98 km (61 mi) WSW of here earthquakes near Madera County

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

Aftershocks so far

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

  1. 2.2 20km SE of Pinnacles, CA
  2. 2.4 13km NW of Pinnacles, CA
  3. 1.6 25km SSW of Los Banos, CA
  4. 2.5 7km NNW of Pinnacles, CA
  5. 1.5 12km NW of Pinnacles, CA
  6. 1.9 7km NNW of Pinnacles, CA
  7. 2.2 11km NE of New Idria, CA
  8. 1.8 14km ESE of Pinnacles, CA
  9. 2.1 23km S of South Dos Palos, CA
  10. 2.2 6km NNW of Pinnacles, CA
  11. 1.6 17km N of Pinnacles, CA
  12. 2.1 9km NW of Pinnacles, CA
  13. 2.1 5km NNE of Pinnacles, CA
  14. 1.7 7km ESE of Pinnacles, CA
  15. 2.3 2km N of Pinnacles, 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 4.3 on 2021-01-02 — it released about 2,500 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.