QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

17 km NNE of Hermleigh, Texas

· 7.9 km deep · released about 3.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Scurry County 24 kmFisher County 24 kmKent County 48 kmNolan County 55 kmMitchell County 57 kmStonewall County 60 kmBorden County 73 kmJones County 74 kmGarza County 76 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 3.6 (ml)
Depth
7.9 km below the surface
Felt
18 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Scurry County, 24 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1769 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 18 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 45,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,400× the energy of this one
  4. This earthquake M 3.6 about 3.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 7.9× 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 32.7667, -100.6605. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Scurry County, TX 24 km (15 mi) E of here earthquakes near Scurry County
Fisher County, TX 24 km (15 mi) W of here earthquakes near Fisher County
Kent County, TX 48 km (30 mi) SSE of here earthquakes near Kent County
Nolan County, TX 55 km (34 mi) NNW of here earthquakes near Nolan County
Mitchell County, TX 57 km (35 mi) NNE of here earthquakes near Mitchell County
Stonewall County, TX 60 km (37 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

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

  1. 2.4 18 km NNW of Snyder, Texas
  2. 2.1 23 km N of Snyder, Texas
  3. 1.5 16 km NE of Hermleigh, Texas
  4. 2.2 16 km NE of Hermleigh, Texas
  5. 1.8 19 km N of Snyder, Texas
  6. 2.9 17 km NNE of Hermleigh, Texas
  7. 2.4 western Texas
  8. 2.7 western Texas
  9. 2.3 western Texas
  10. 2.0 19 km N of Snyder, Texas
  11. 1.9 17 km NNE of Hermleigh, Texas
  12. 3.2 18 km NNE of Hermleigh, Texas
  13. 3.0 17 km NNE of Hermleigh, Texas
  14. 2.6 16 km NNE of Hermleigh, Texas
  15. 3.2 13 km N of Snyder, 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 2019-09-30 — it released about 4 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.