QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

Earthquake near Huron, CA

No earthquake was likely felt in Huron in the 24 hours to 3:32 am PST (11:32 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 1.5 earthquake was recorded 11 km (7 mi) west-southwest of Huron, CA, at 7:33 am PDT on 26 July 2021 (14:33 UTC), 8.4 km deep.

USGS: 11km WSW of Huron, CA

80 km (50 mi) SSW of Fresno, CA · 54 km (33 mi) WSW of Hanford, CA

7:33 am PDT, Jul 26, 2021 · · 8.4 km deep · released about 5.6 lb of TNT

10 km30 km60 km120 km N Kings County 37 kmFresno County 84 kmSan Luis Obispo County 87 kmSan Benito County 94 kmMonterey County 100 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
7:33 am PDT on 26 July 2021 ()
Where
11 km (7 mi) west-southwest of Huron, CA · earthquakes near Huron
Magnitude
M 1.5 (md)
Depth
8.4 km below the surface
Felt
no reports yet
Nearest
Kings County, 37 km ESE
Nearest mapped fault
Great Valley thrust fault system, 6 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 1933 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 6 km (4 mi) from the epicentre. In Huron, 11 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: Coalinga, Avenal, Kettleman City.

How big was it?

This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 15,000 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 · 13 km NW of this epicentre
  2. 6.5 1922 Parkfield, California Earthquake · 45 km S of this epicentre
  3. 6.4 1901 Parkfield, California Earthquake · 31 km WSW of this epicentre
  4. 6.0 2004 Parkfield, California Earthquake · 39 km SSW of this epicentre
  5. 5.6 8 km SW of Huron, California · 5 km E 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 36.1497, -120.2118. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kings County, CA 37 km (23 mi) ESE earthquakes near Kings County
Fresno County, CA 84 km (52 mi) NE earthquakes near Fresno County
San Luis Obispo County, CA 87 km (54 mi) SSW earthquakes near San Luis Obispo County
San Benito County, CA 94 km (58 mi) WNW earthquakes near San Benito County
Monterey County, CA 100 km (62 mi) W earthquakes near Monterey County
Merced County, CA 125 km (78 mi) NNW earthquakes near Merced County

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

Aftershocks so far

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

  1. 2.1 12km WNW of Corcoran, CA
  2. 1.7 14km SSW of Avenal, CA
  3. 1.9 14km SSW of Avenal, CA
  4. 1.8 24km NW of Parkfield, CA
  5. 1.5 12km NW of Parkfield, CA
  6. 1.7 16km ESE of Kettleman City, CA
  7. 1.6 23km ENE of San Ardo, CA
  8. 3.2 7km NW of Parkfield, CA
  9. 1.6 0km ENE of Kettleman City, CA
  10. 1.6 8km SSE of Huron, CA
  11. 1.8 22km NW of Parkfield, CA
  12. 2.2 4km ESE of Cholame, CA
  13. 2.1 5km N of Stratford, 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.