QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

5 km SE of Ackerly, Texas

· 8.5 km deep · released about 1,900 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Howard County 31 kmMartin County 34 kmBorden County 35 kmDawson County 38 kmGlasscock County 71 kmMitchell County 74 kmScurry County 77 kmLynn County 77 kmMidland County 81 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
Magnitude
M 3.2 (ml)
Depth
8.5 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Howard County, 31 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 677 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,600× the energy of this one
  4. This earthquake M 3.2 about 1,900 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2× more

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.

Where

Epicentre 32.4930, -101.6780. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Howard County, TX 31 km (19 mi) NW of here earthquakes near Howard County
Martin County, TX 34 km (21 mi) NE of here earthquakes near Martin County
Borden County, TX 35 km (22 mi) SW of here earthquakes near Borden County
Dawson County, TX 38 km (23 mi) SE of here earthquakes near Dawson County
Glasscock County, TX 71 km (44 mi) NNW of here earthquakes near Glasscock County
Mitchell County, TX 74 km (46 mi) WNW of here earthquakes near Mitchell County

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

Aftershocks so far

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

  1. 1.6 33 km WSW of Ackerly, Texas
  2. 1.7 19 km NW of Stanton, Texas
  3. 1.6 39 km SSW of Los Ybanez, Texas
  4. 2.4 western Texas
  5. 1.8 36 km SSW of Los Ybanez, Texas
  6. 2.0 36 km SSW of Los Ybanez, Texas
  7. 2.6 38 km SSW of Los Ybanez, Texas
  8. 1.7 37 km NW of Stanton, Texas
  9. 1.9 37 km NW of Stanton, Texas
  10. 2.3 38 km SSW of Los Ybanez, Texas
  11. 1.6 19 km SE of Ackerly, Texas
  12. 1.6 38 km WSW of Ackerly, Texas
  13. 1.5 38 km SSW of Los Ybanez, Texas
  14. 2.5 19 km N of Stanton, Texas
  15. 2.4 17 km N of Stanton, Texas

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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2021-12-28 — it released about 130 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.