QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

35 km WSW of Ackerly, Texas

· 7.7 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Martin County 16 kmDawson County 37 kmAndrews County 55 kmHoward County 61 kmGaines County 63 kmMidland County 68 kmBorden County 69 kmEctor County 76 kmGlasscock 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 3.1 (ml)
Depth
7.7 km below the surface
Felt
no reports yet
Nearest
Martin County, 16 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1858 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 32.4234, -102.0742. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Martin County, TX 16 km (10 mi) NW of here earthquakes near Martin County
Dawson County, TX 37 km (23 mi) SSW of here earthquakes near Dawson County
Andrews County, TX 55 km (34 mi) ENE of here earthquakes near Andrews County
Howard County, TX 61 km (38 mi) WNW of here earthquakes near Howard County
Gaines County, TX 63 km (39 mi) SE of here earthquakes near Gaines County
Midland County, TX 68 km (42 mi) N of here earthquakes near Midland County

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

Aftershocks so far

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

  1. 2.2 29 km E of McKinney Acres, Texas
  2. 2.6 15 km NNW of Midland, Texas
  3. 1.8 15 km NNW of Midland, Texas
  4. 2.3 12 km N of Midland, Texas
  5. 1.9 15 km NNW of Midland, Texas
  6. 3.7 16 km NNW of Midland, Texas
  7. 1.6 15 km NNW of Midland, Texas
  8. 2.1 16 km WNW of Big Spring, Texas
  9. 1.8 12 km NNW of Midland, Texas
  10. 2.4 12 km NNW of Midland, Texas
  11. 1.9 15 km NNW of Midland, Texas
  12. 2.9 31 km E of McKinney Acres, Texas
  13. 2.2 31 km E of McKinney Acres, Texas
  14. 2.2 14 km NNW of Midland, Texas
  15. 1.9 6 km SE of Ackerly, 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 4.0 on 2020-12-31 — it released about 22 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.