QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

39 km ENE of McKinney Acres, Texas

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Martin County 19 kmDawson County 41 kmAndrews County 49 kmGaines County 60 kmHoward County 66 kmMidland County 67 kmEctor County 71 kmBorden County 75 kmGlasscock County 83 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
7.1 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Martin County, 19 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 765 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

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 32.4040, -102.1310. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Martin County, TX 19 km (12 mi) WNW of here earthquakes near Martin County
Dawson County, TX 41 km (26 mi) SSW of here earthquakes near Dawson County
Andrews County, TX 49 km (30 mi) ENE of here earthquakes near Andrews County
Gaines County, TX 60 km (37 mi) SE of here earthquakes near Gaines County
Howard County, TX 66 km (41 mi) W of here earthquakes near Howard County
Midland County, TX 67 km (41 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

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

  1. 2.9 37 km WSW of Ackerly, Texas
  2. 1.5 20 km NNW of Stanton, Texas
  3. 1.6 2 km NW of Stanton, Texas
  4. 1.6 19 km N of Stanton, Texas
  5. 2.0 34 km E of McKinney Acres, Texas
  6. 2.4 16 km NW of Stanton, Texas
  7. 2.2 34 km WSW of Ackerly, Texas
  8. 1.5 9 km E of Midland, Texas
  9. 1.5 34 km E of McKinney Acres, Texas
  10. 2.1 23 km WSW of Ackerly, Texas
  11. 1.6 21 km WNW of Stanton, Texas
  12. 2.1 21 km WNW of Stanton, Texas
  13. 2.9 21 km WNW of Stanton, Texas
  14. 1.7 20 km WNW of Stanton, Texas
  15. 2.5 21 km WNW 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 5.2 on 2022-12-16 — it released about 1,400 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.