QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

Earthquake near Huron, CA

No earthquake was likely felt in Huron in the 24 hours to 4:36 am PST (12:36 UTC). The last one was M 2.2, 10 km (6 mi) SE, at 2:35 am PDT on 16 September 2026, estimated intensity II (weak) in town. Every earthquake near Huron

This page: a magnitude 2.2 earthquake was recorded 12 km (7 mi) south-southeast of Huron, CA, at 7:42 pm PDT on 5 April 2020 (02:42 UTC), 5.1 km deep.

USGS: 12km SSE of Huron, CA

79 km (49 mi) SSW of Fresno, CA · 43 km (27 mi) SW of Hanford, CA

7:42 pm PDT, Apr 5, 2020 · · 5.1 km deep · released about 56 lb of TNT

10 km30 km60 km120 km N Kings County 21 kmFresno County 81 kmSan Luis Obispo County 87 kmSan Benito County 109 kmMonterey County 115 kmTulare County 115 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
7:42 pm PDT on 5 April 2020 ()
Where
12 km (7 mi) south-southeast of Huron, CA · earthquakes near Huron
Magnitude
M 2.2 (md)
Depth
5.1 km below the surface
Felt
no reports yet
Nearest
Kings County, 21 km E
Nearest mapped fault
Great Valley thrust fault system, 2 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 2411 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 18 km (11 mi) from the epicentre. In Huron, 12 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.

Likely felt in: Huron 12 km, intensity II · Avenal 13 km, intensity II · Kettleman City 13 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 56 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 270,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 190,000× the energy of this one
  3. Around the size people start to feel M 3.0 17× the energy of this one
  4. This earthquake M 2.2 about 56 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 1,500 times the energy of this one.

Before 2016, the USGS record lists 17 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 The 1983 Coalinga, California Earthquake · 27 km WNW of this epicentre
  2. 6.5 1922 Parkfield, California Earthquake · 43 km SSW of this epicentre
  3. 6.4 1901 Parkfield, California Earthquake · 42 km WSW of this epicentre
  4. 6.0 2004 Parkfield, California Earthquake · 43 km SW of this epicentre
  5. 5.6 8 km SW of Huron, California · 10 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 36.1038, -120.0505. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kings County, CA 21 km (13 mi) E earthquakes near Kings County
Fresno County, CA 81 km (50 mi) NNE earthquakes near Fresno County
San Luis Obispo County, CA 87 km (54 mi) SSW earthquakes near San Luis Obispo County
San Benito County, CA 109 km (67 mi) WNW earthquakes near San Benito County
Monterey County, CA 115 km (71 mi) W earthquakes near Monterey County
Tulare County, CA 115 km (71 mi) E earthquakes near Tulare County

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

Aftershocks so far

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

  1. 1.8 22km SSE of Kettleman City, CA
  2. 1.7 16km SSE of Kettleman City, CA
  3. 2.7 7km ESE of Huron, CA
  4. 2.1 8km NNW of Cholame, CA
  5. 1.8 2km E of Cholame, CA
  6. 2.5 17km SSE of Kettleman City, CA
  7. 2.8 10km NW of Parkfield, CA
  8. 1.8 12km N of Coalinga, CA
  9. 1.9 11km NNE of Coalinga, CA
  10. 2.5 18km ESE of Kettleman City, CA
  11. 2.1 8km NNW of Kettleman City, CA
  12. 3.0 18km S of Cantua Creek, CA
  13. 2.3 19km E of Kettleman City, CA
  14. 2.0 7km WSW of Kettleman City, CA
  15. 1.8 8km SE 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.