QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

Earthquake near Kettleman City, CA

No earthquake was likely felt in Kettleman City in the 24 hours to 5:59 am PST (13:59 UTC). The last one was M 2.0, 13 km (8 mi) S, at 5:43 pm PST on 3 November 2026, estimated intensity II (weak) in town. Every earthquake near Kettleman City

This page: a magnitude 2.3 earthquake was recorded 19 km (12 mi) east of Kettleman City, CA, at 11:35 pm PDT on 31 July 2020 (06:35 UTC), 12 km deep.

USGS: 19km E of Kettleman City, CA

89 km (55 mi) S of Fresno, CA · 39 km (24 mi) SSW of Hanford, CA

11:35 pm PDT, Jul 31, 2020 · · 12 km deep · released about 72 lb of TNT

10 km30 km60 km120 km N Kings County 12 kmFresno County 87 kmTulare County 91 kmSan Luis Obispo County 91 kmKern County 116 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
11:35 pm PDT on 31 July 2020 ()
Where
19 km (12 mi) east of Kettleman City, CA · earthquakes near Kettleman City
Magnitude
M 2.3 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Kings County, 12 km NNW
Nearest mapped fault
Great Valley thrust fault system, 16 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2293 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 15 km (9 mi) from the epicentre. In Kettleman City, 19 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Corcoran, Stratford, Alpaugh.

How big was it?

This earthquake released about 72 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 210,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 150,000× the energy of this one
  3. Around the size people start to feel M 3.0 13× the energy of this one
  4. This earthquake M 2.3 about 72 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.0 on 2018-11-27 — about 420 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.6 8 km SW of Huron, California · 41 km WNW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 35.9825, -119.7488. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kings County, CA 12 km (7 mi) NNW earthquakes near Kings County
Fresno County, CA 87 km (54 mi) N earthquakes near Fresno County
Tulare County, CA 91 km (57 mi) ENE earthquakes near Tulare County
San Luis Obispo County, CA 91 km (57 mi) SW earthquakes near San Luis Obispo County
Kern County, CA 116 km (72 mi) SE earthquakes near Kern County

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

Aftershocks so far

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

  1. 1.6 25km S of Kettleman City, CA
  2. 1.8 1km SW of Kettleman City, CA
  3. 2.1 6km SW of Woodville, CA
  4. 2.5 2km N of Armona, CA
  5. 1.7 13km NNW of Avenal, CA
  6. 1.6 9km NW of Avenal, CA
  7. 2.5 7km NW of Avenal, CA
  8. 1.6 9km NNW of Avenal, CA
  9. 1.6 12km NNW of Avenal, CA
  10. 1.6 13km NNW of Avenal, CA
  11. 1.5 12km E of Coalinga, CA
  12. 1.6 12km NNW of Avenal, CA
  13. 2.2 12km NNW of Avenal, CA
  14. 2.1 7km ESE of Kettleman City, CA
  15. 1.7 12km SW of Huron, 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.