QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

20km E of Pinnacles, CA

· 14 km deep · released about 79 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 19 kmMonterey County 46 kmMerced County 79 kmSanta Clara County 105 kmKings County 110 kmSanta Cruz County 112 kmFresno County 116 kmStanislaus County 118 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 2.3 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
San Benito County, 19 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2412 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 79 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 190,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 79 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 36.5052, -120.9168. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 19 km (12 mi) SE of here earthquakes near San Benito County
Monterey County, CA 46 km (29 mi) NE of here earthquakes near Monterey County
Merced County, CA 79 km (49 mi) SSW of here earthquakes near Merced County
Santa Clara County, CA 105 km (65 mi) SE of here earthquakes near Santa Clara County
Kings County, CA 110 km (68 mi) WNW of here earthquakes near Kings County
Santa Cruz County, CA 112 km (70 mi) ESE of here earthquakes near Santa Cruz County

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

Aftershocks so far

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

  1. 1.6 24km NE of King City, CA
  2. 1.6 28km SW of South Dos Palos, CA
  3. 2.4 16km NW of Pinnacles, CA
  4. 2.3 15km NW of Pinnacles, CA
  5. 2.2 8km NNW of Pinnacles, CA
  6. 1.6 12km NW of Pinnacles, CA
  7. 1.8 5km NNE of Pinnacles, CA
  8. 2.6 11km NNE of New Idria, CA
  9. 2.0 16km SW of New Idria, CA
  10. 1.7 12km SSE of Tres Pinos, CA
  11. 1.9 4km ENE of Pinnacles, CA
  12. 2.5 15km SSE of Tres Pinos, CA
  13. 1.9 5km NNE of Pinnacles, CA
  14. 2.6 4km NNW of Pinnacles, CA
  15. 1.6 12km NW 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 4,400 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.