QuakeIndex

Earthquake · automatic estimate, may change

M 3.1ml

12 km NW of Pinnacles, CA

· 6.4 km deep · released about 1,400 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 14 kmMonterey County 41 kmSanta Clara County 79 kmMerced County 80 kmSanta Cruz County 82 kmStanislaus County 109 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 3.1 (ml)
Depth
6.4 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
San Benito County, 14 km E
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 577 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 240,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,700× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× 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 36.6037, -121.2407. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 14 km (9 mi) W of here earthquakes near San Benito County
Monterey County, CA 41 km (25 mi) N of here earthquakes near Monterey County
Santa Clara County, CA 79 km (49 mi) SSE of here earthquakes near Santa Clara County
Merced County, CA 80 km (50 mi) SW of here earthquakes near Merced County
Santa Cruz County, CA 82 km (51 mi) ESE of here earthquakes near Santa Cruz County
Stanislaus County, CA 109 km (68 mi) SSW of here earthquakes near Stanislaus County

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

Aftershocks so far

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

  1. 1.5 10 km NNW of Pinnacles, CA
  2. 1.8 16 km NNW of Pinnacles, CA
  3. 2.1 16 km NNW of Pinnacles, CA
  4. 2.0 2 km ENE of Aromas, CA
  5. 3.0 17 km NNW of Pinnacles, CA
  6. 1.7 16 km SE of Pinnacles, CA
  7. 1.6 15 km S of Tres Pinos, CA
  8. 2.6 15 km S of Tres Pinos, CA
  9. 3.0 12 km SSW of Tres Pinos, CA
  10. 1.6 12 km SSW of Tres Pinos, CA
  11. 1.5 14 km NW of Pinnacles, CA
  12. 1.9 3 km of Pinnacles, CA
  13. 1.7 11 km SSE of Pinnacles, CA
  14. 1.6 11 km ESE of Pinnacles, CA
  15. 1.9 15 km 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 250 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.