QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

9 km NE of Hermleigh, Texas

· 1.7 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Scurry County 20 kmFisher County 28 kmMitchell County 49 kmNolan County 51 kmKent County 54 kmStonewall County 67 kmBorden County 69 kmGarza County 77 kmJones County 78 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
1.7 km below the surface
Felt
no reports yet
Nearest
Scurry County, 20 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1025 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 32.7070, -100.7020. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Scurry County, TX 20 km (13 mi) ESE of here earthquakes near Scurry County
Fisher County, TX 28 km (18 mi) W of here earthquakes near Fisher County
Mitchell County, TX 49 km (31 mi) NNE of here earthquakes near Mitchell County
Nolan County, TX 51 km (32 mi) NNW of here earthquakes near Nolan County
Kent County, TX 54 km (33 mi) S of here earthquakes near Kent County
Stonewall County, TX 67 km (42 mi) SW of here earthquakes near Stonewall County

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

Aftershocks so far

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

  1. 2.1 14 km N of Snyder, Texas
  2. 2.3 15 km NE of Hermleigh, Texas
  3. 1.6 15 km NNW of Snyder, Texas
  4. 1.7 18 km N of Snyder, Texas
  5. 1.6 15 km NE of Hermleigh, Texas
  6. 1.6 17 km NE of Hermleigh, Texas
  7. 2.4 25 km N of Snyder, Texas
  8. 1.7 17 km NE of Hermleigh, Texas
  9. 2.1 17 km NE of Hermleigh, Texas
  10. 2.2 17 km NE of Hermleigh, Texas
  11. 2.7 17 km NE of Hermleigh, Texas
  12. 2.3 14 km ENE of Hermleigh, Texas
  13. 1.6 14 km ENE of Hermleigh, Texas
  14. 2.1 14 km ENE of Hermleigh, Texas
  15. 1.7 15 km ENE of Hermleigh, 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 4.7 on 2023-02-16 — it released about 22,000 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.