QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

Earthquake near Clovis, CA

No earthquake was likely felt in Clovis in the 24 hours to 3:22 am PST (11:22 UTC). The last one was M 5.7, 286 km (177 mi) NNE, at 6:29 pm PDT on 13 April 2026, estimated intensity II (weak) in town; 6,515 felt reports to USGS. Every earthquake near Clovis

This page: a magnitude 2.3 earthquake was recorded 46 km (28 mi) northeast of Clovis, CA, at 10:14 am PDT on 28 July 2021 (17:14 UTC), 40 km deep.

USGS: 6km SE of Shaver Lake, CA

55 km (34 mi) NE of Fresno, CA · 44 km (27 mi) NE of Clovis, CA

10:14 am PDT, Jul 28, 2021 · · 40 km deep · released about 77 lb of TNT

10 km30 km60 km120 km N Madera County 45 kmFresno County 47 kmMariposa County 80 kmMono County 102 kmTulare County 102 kmKings County 120 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
10:14 am PDT on 28 July 2021 ()
Where
46 km (28 mi) northeast of Clovis, CA · earthquakes near Clovis
Magnitude
M 2.3 (md)
Depth
40 km below the surface
Felt
no reports yet
Nearest
Madera County, 45 km WNW
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 it was probably too small to be felt, even directly above it. In Clovis, 46 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: Auberry.

How big was it?

This earthquake released about 77 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 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 77 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 37.0590, -119.2803. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Madera County, CA 45 km (28 mi) WNW earthquakes near Madera County
Fresno County, CA 47 km (29 mi) SW earthquakes near Fresno County
Mariposa County, CA 80 km (50 mi) NW earthquakes near Mariposa County
Mono County, CA 102 km (63 mi) NNE earthquakes near Mono County
Tulare County, CA 102 km (64 mi) SSE earthquakes near Tulare County
Kings County, CA 120 km (74 mi) SSW earthquakes near Kings County

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

Aftershocks so far

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

  1. 2.0 8km W of North Fork, CA
  2. 1.5 7km NE of Bonadelle Ranchos-Madera Ranchos, CA
  3. 1.5 31km SSW of Round Valley, CA
  4. 2.0 30km ENE of Shaver Lake, CA
  5. 1.8 29km NE of Oakhurst, CA
  6. 1.9 30km NE of Oakhurst, CA
  7. 2.2 11km WSW of Squaw Valley, CA
  8. 2.1 6km NE of Bonadelle Ranchos-Madera Ranchos, CA
  9. 2.3 6km NE of Orange Cove, CA
  10. 1.5 32km ENE of Shaver Lake, CA
  11. 2.1 4km WSW of Squaw Valley, CA
  12. 2.1 0km SW of Yosemite Lakes, CA
  13. 2.1 12km S of Yosemite Lakes, CA
  14. 2.1 6km NE of Bonadelle Ranchos-Madera Ranchos, CA
  15. 1.6 7km N of Oakhurst, 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.