QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

22 km SW of South Dos Palos, CA

· 8.3 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 33 kmMerced County 44 kmMonterey County 78 kmStanislaus County 86 kmSanta Clara County 92 kmFresno County 102 kmMadera County 104 kmSanta Cruz County 110 kmMariposa County 116 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 2.8 (md)
Depth
8.3 km below the surface
Felt
no reports yet
Nearest
San Benito County, 33 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 128 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 550 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 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 36.8035, -120.8003. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 33 km (21 mi) NE of here earthquakes near San Benito County
Merced County, CA 44 km (27 mi) S of here earthquakes near Merced County
Monterey County, CA 78 km (48 mi) NE of here earthquakes near Monterey County
Stanislaus County, CA 86 km (54 mi) SSE of here earthquakes near Stanislaus County
Santa Clara County, CA 92 km (57 mi) ESE of here earthquakes near Santa Clara County
Fresno County, CA 102 km (63 mi) W of here earthquakes near Fresno County

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

Aftershocks so far

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

  1. 2.0 15 km S of Tres Pinos, CA
  2. 1.9 14 km S of Tres Pinos, CA
  3. 2.1 22 km SE of Pinnacles, CA
  4. 2.3 14 km S of Tres Pinos, CA
  5. 2.3 12 km S of Tres Pinos, CA
  6. 2.7 10 km NW of Pinnacles, CA
  7. 2.5 11 km S of Tres Pinos, CA
  8. 1.9 5 km NNW of Pinnacles, CA
  9. 2.8 16 km S of Tres Pinos, CA
  10. 2.6 16 km S of Tres Pinos, CA
  11. 1.9 1 km WSW of Pinnacles, CA
  12. 1.7 6 km NW of Pinnacles, CA
  13. 1.8 19 km NW of New Idria, CA
  14. 1.6 11 km S of Tres Pinos, CA
  15. 1.5 1 km SSW 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 4.7 on 2019-10-15 — it released about 640 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.