QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

29 km ENE of Porterville, CA

· 5.2 km deep · released about 140 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tulare County 9 kmKern County 91 kmKings County 99 kmFresno County 107 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 2.5 (ml)
Depth
5.2 km below the surface
Felt
9 reports · strongest reported intensity III
Nearest
Tulare County, 9 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 507 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 9 people have reported feeling it to USGS.

How big was it?

This earthquake released about 140 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 75,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.7× the energy of this one
  4. This earthquake M 2.5 about 140 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 36.1660, -118.7208. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tulare County, CA 9 km (5 mi) SE of here earthquakes near Tulare County
Kern County, CA 91 km (57 mi) N of here earthquakes near Kern County
Kings County, CA 99 km (61 mi) E of here earthquakes near Kings County
Fresno County, CA 107 km (66 mi) SE of here earthquakes near Fresno County
Inyo County, CA 126 km (78 mi) WSW of here earthquakes near Inyo County
Madera County, CA 148 km (92 mi) SE of here earthquakes near Madera County

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

Aftershocks so far

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

  1. 1.4 32 km N of Kernville, CA
  2. 1.7 31 km N of Kernville, CA
  3. 1.0 31 km N of Kernville, CA
  4. 1.6 26 km NW of Kernville, CA
  5. 1.6 9 km SE of Porterville, CA
  6. 0.7 26 km NNE of Kernville, CA
  7. 1.7 28 km WSW of Olancha, CA
  8. 2.5 28 km WSW of Olancha, CA
  9. 1.6 6 km SE of Poplar-Cotton Center, CA
  10. 1.9 10 km E of Porterville, CA
  11. 2.4 42 km WSW of Olancha, CA
  12. 2.1 28 km WSW of Olancha, CA
  13. 2.0 23 km SSE of Porterville, CA
  14. 1.5 23 km SSE of Porterville, CA
  15. 2.2 24 km SSE of Porterville, 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.