QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

14km ESE of Porterville, CA

· 9.2 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tulare County 25 kmKern County 75 kmKings County 85 kmFresno 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 1.8 (ml)
Depth
9.2 km below the surface
Felt
no reports yet
Nearest
Tulare County, 25 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1768 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 36.0128, -118.8693. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tulare County, CA 25 km (16 mi) SSW of here earthquakes near Tulare County
Kern County, CA 75 km (47 mi) N of here earthquakes near Kern County
Kings County, CA 85 km (53 mi) E of here earthquakes near Kings County
Fresno County, CA 109 km (68 mi) SE of here earthquakes near Fresno County

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

Aftershocks so far

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

  1. 2.4 28 km ENE of Porterville, CA
  2. 1.6 17 km E of Delano, CA
  3. 2.5 34 km SE of Three Rivers, CA
  4. 2.1 27 km NNE of Kernville, CA
  5. 1.8 26 km NNE of Kernville, CA
  6. 1.5 8 km E of Porterville, CA
  7. 2.0 6 km N of Delano, CA
  8. 2.2 8 km N of Delano, CA
  9. 1.5 22km ENE of Delano, CA
  10. 1.6 26km NNE of Kernville, CA
  11. 2.0 15km ESE of Porterville, CA
  12. 1.7 24km N of Kernville, CA
  13. 1.9 7km NNE of Porterville, CA
  14. 1.5 40km WSW of Olancha, CA
  15. 3.1 10km ENE 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.