QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

Earthquake near Kettleman City, CA

No earthquake was likely felt in Kettleman City in the 24 hours to 3:54 pm PST (23:54 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 1.6 earthquake was recorded 25 km (15 mi) south of Kettleman City, CA, at 1:29 am PDT on 13 May 2021 (08:29 UTC), less than 1 km deep.

USGS: 25km S of Kettleman City, CA

1:29 am PDT, May 13, 2021 · · -0.2 km deep · released about 6.6 lb of TNT

10 km30 km60 km120 km N Kings County 34 kmSan Luis Obispo County 63 kmFresno County 112 kmTulare 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
1:29 am PDT on 13 May 2021 ()
Where
25 km (15 mi) south of Kettleman City, CA · earthquakes near Kettleman City
Magnitude
M 1.6 (md)
Depth
-0.2 km below the surface
Felt
no reports yet
Nearest
Kings County, 34 km NNE
Nearest mapped fault
Great Valley thrust fault system, 25 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 2010 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 11 km (7 mi) from the epicentre. In Kettleman City, 25 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: Avenal, Lost Hills.

How big was it?

This earthquake released about 6.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.6 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 4.3 on 2019-12-17 — about 12,000 times the energy of this one.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.5 1922 Parkfield, California Earthquake · 27 km W of this epicentre
  2. 6.0 2004 Parkfield, California Earthquake · 38 km W of this epicentre
  3. 5.6 8 km SW of Huron, California · 44 km NNW of this epicentre
  4. 5.5 1966 Parkfield, California Earthquake · 31 km W of this epicentre
  5. 5.0 11 km NNE of Shandon, California · 34 km W 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 35.7853, -119.9502. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kings County, CA 34 km (21 mi) NNE earthquakes near Kings County
San Luis Obispo County, CA 63 km (39 mi) SW earthquakes near San Luis Obispo County
Fresno County, CA 112 km (69 mi) NNE earthquakes near Fresno County
Tulare County, CA 116 km (72 mi) ENE earthquakes near Tulare County
Kern County, CA 121 km (75 mi) ESE earthquakes near Kern County
San Benito County, CA 137 km (85 mi) NW earthquakes near San Benito County

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

Aftershocks so far

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

  1. 1.8 20km ESE of Kettleman City, CA
  2. 1.6 20km ESE of Kettleman City, CA
  3. 1.7 11km NNE of Kettleman City, CA
  4. 3.3 1km W of Parkfield, CA
  5. 2.5 11km N of Avenal, CA
  6. 2.1 12km WNW of Corcoran, CA
  7. 1.7 14km SSW of Avenal, CA
  8. 1.9 14km SSW of Avenal, CA
  9. 1.7 16km ESE of Kettleman City, CA
  10. 1.6 22km WNW of Buttonwillow, CA
  11. 1.6 0km ENE of Kettleman City, CA
  12. 1.6 8km SSE of Huron, CA
  13. 2.2 4km ESE of Cholame, CA
  14. 1.7 13km ESE of Kettleman City, CA
  15. 1.9 12km ESE of Kettleman City, 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.