QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

11 km SSW of Ackerly, Texas

· 9.2 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Martin County 23 kmHoward County 33 kmDawson County 40 kmBorden County 46 kmGlasscock County 66 kmMidland County 72 kmMitchell County 79 kmLynn County 84 kmAndrews County 84 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 1.8 (ml)
Depth
9.2 km below the surface
Felt
no reports yet
Nearest
Martin County, 23 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 657 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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.

Where

Epicentre 32.4250, -101.7550. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Martin County, TX 23 km (14 mi) ENE of here earthquakes near Martin County
Howard County, TX 33 km (20 mi) WNW of here earthquakes near Howard County
Dawson County, TX 40 km (25 mi) SSE of here earthquakes near Dawson County
Borden County, TX 46 km (28 mi) SW of here earthquakes near Borden County
Glasscock County, TX 66 km (41 mi) NNW of here earthquakes near Glasscock County
Midland County, TX 72 km (45 mi) NNE of here earthquakes near Midland County

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

Aftershocks so far

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

  1. 1.6 33 km WSW of Ackerly, Texas
  2. 1.9 33 km WSW of Ackerly, Texas
  3. 2.6 33 km WSW of Ackerly, Texas
  4. 1.8 15 km SSE of Stanton, Texas
  5. 1.5 9 km NNW of Forsan, Texas
  6. 1.7 14 km NNW of Sand Springs, Texas
  7. 2.2 14 km NNW of Sand Springs, Texas
  8. 1.7 39 km ENE of McKinney Acres, Texas
  9. 1.5 35 km WSW of Ackerly, Texas
  10. 2.2 10 km W of Forsan, Texas
  11. 1.6 15 km SSE of Stanton, Texas
  12. 1.6 15 km SSE of Stanton, Texas
  13. 1.5 20 km NNE of Stanton, Texas
  14. 1.5 30 km WSW of Ackerly, Texas
  15. 1.6 35 km WSW 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 5.2 on 2022-12-16 — it released about 130,000 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.