QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3mw

24km ENE of San Ardo, CA

· 4.9 km deep · released about 1.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Monterey County 63 kmSan Benito County 72 kmKings County 74 kmSan Luis Obispo County 78 kmFresno County 117 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 3.3 (mw)
Depth
4.9 km below the surface
Felt
13 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
Nearest
Monterey County, 63 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2806 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 13 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 120,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,800× the energy of this one
  4. This earthquake M 3.3 about 1.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.9× 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 36.0738, -120.6433. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Monterey County, CA 63 km (39 mi) ESE of here earthquakes near Monterey County
San Benito County, CA 72 km (45 mi) SSE of here earthquakes near San Benito County
Kings County, CA 74 km (46 mi) W of here earthquakes near Kings County
San Luis Obispo County, CA 78 km (49 mi) NNW of here earthquakes near San Luis Obispo County
Fresno County, CA 117 km (73 mi) SW of here earthquakes near Fresno County

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

Aftershocks so far

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

  1. 1.6 4km WSW of San Ardo, CA
  2. 2.5 6km SSE of Parkfield, CA
  3. 1.6 16km NW of Parkfield, CA
  4. 1.6 16km NW of Parkfield, CA
  5. 2.8 8km NE of Coalinga, CA
  6. 1.8 10km NW of Parkfield, CA
  7. 2.9 10km NW of Avenal, CA
  8. 2.5 10km NW of Avenal, CA
  9. 1.5 10km NW of Avenal, CA
  10. 4.0 9km NW of Avenal, CA
  11. 1.9 22km NE of San Lucas, CA
  12. 2.0 17km SSW of New Idria, CA
  13. 2.1 23km NE of San Ardo, CA
  14. 1.8 22km ENE of San Lucas, CA
  15. 2.2 23km ENE of San Lucas, 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.