QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0mw

10km NNE of New Idria, CA

· 11 km deep · released about 15 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 44 kmMonterey County 69 kmMerced County 78 kmKings County 86 kmFresno County 91 kmMadera County 110 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 4.0 (mw)
Depth
11 km below the surface
Felt
16 reports · strongest reported intensity IV
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Nearest
San Benito County, 44 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2321 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 16 people have reported feeling it to USGS.

How big was it?

This earthquake released about 15 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 12,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 520× the energy of this one
  3. Magna, Utah 2020 M 5.7 370× the energy of this one
  4. This earthquake M 4.0 about 15 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 31× 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 36.4997, -120.6167. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 44 km (27 mi) ESE of here earthquakes near San Benito County
Monterey County, CA 69 km (43 mi) ENE of here earthquakes near Monterey County
Merced County, CA 78 km (48 mi) S of here earthquakes near Merced County
Kings County, CA 86 km (53 mi) WNW of here earthquakes near Kings County
Fresno County, CA 91 km (56 mi) WSW of here earthquakes near Fresno County
Madera County, CA 110 km (69 mi) SW of here earthquakes near Madera County

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

Aftershocks so far

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

  1. 1.6 7km NE of Pinnacles, CA
  2. 2.0 7km NE of Pinnacles, CA
  3. 1.9 5km ESE of Pinnacles, CA
  4. 1.8 8km NE of Coalinga, CA
  5. 2.0 21km SE of Pinnacles, CA
  6. 2.4 26km NNW of New Idria, CA
  7. 2.3 23km NNE of San Ardo, CA
  8. 2.4 14km SW of New Idria, CA
  9. 1.6 5km NNE of Pinnacles, CA
  10. 1.5 33km NE of Pinnacles, CA
  11. 1.9 8km NNE of New Idria, CA
  12. 2.1 10km SE of Pinnacles, CA
  13. 2.0 10km SE of Pinnacles, CA
  14. 2.2 10km SE of Pinnacles, CA
  15. 1.5 9km WNW of New Idria, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.