QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

29km NE of Pinnacles, CA

· 7.3 km deep · released about 1,800 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 19 kmMerced County 55 kmMonterey County 64 kmSanta Clara County 86 kmStanislaus County 92 kmSanta Cruz County 100 kmFresno County 115 kmMadera County 119 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 3.2 (ml)
Depth
7.3 km below the surface
Felt
8 reports · strongest reported intensity II
Nearest
San Benito County, 19 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1905 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 8 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 190,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,000× the energy of this one
  4. This earthquake M 3.2 about 1,800 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.9× more

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 36.7350, -120.9442. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 19 km (12 mi) NE of here earthquakes near San Benito County
Merced County, CA 55 km (34 mi) SSW of here earthquakes near Merced County
Monterey County, CA 64 km (40 mi) NNE of here earthquakes near Monterey County
Santa Clara County, CA 86 km (53 mi) SE of here earthquakes near Santa Clara County
Stanislaus County, CA 92 km (57 mi) S of here earthquakes near Stanislaus County
Santa Cruz County, CA 100 km (62 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

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

  1. 1.9 4km NNE of Pinnacles, CA
  2. 1.6 26km SSW of Los Banos, CA
  3. 1.7 13km SSW of Tres Pinos, CA
  4. 3.0 13km SSE of Tres Pinos, CA
  5. 1.9 11km ENE of Pinnacles, CA
  6. 2.0 11km NW of Pinnacles, CA
  7. 2.0 2km N of Pinnacles, CA
  8. 1.8 2km N of Pinnacles, CA
  9. 1.8 3km NE of Pinnacles, CA
  10. 1.6 4km NNE of Pinnacles, CA
  11. 1.6 5km NNE of Pinnacles, CA
  12. 2.5 19km SE of Pinnacles, CA
  13. 1.9 3km NE of Pinnacles, CA
  14. 2.2 6km NNE of Tres Pinos, CA
  15. 1.6 15km SW of Tres Pinos, 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 200 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.