QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1mb_lg

5 km SSW of Farmers Branch, Texas

· 4.2 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dallas County 19 kmTarrant County 36 kmDenton County 40 kmCollin County 48 kmRockwall County 48 kmEllis County 61 kmKaufman County 68 kmJohnson County 69 kmWise County 77 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 2.1 (mb_lg)
Depth
4.2 km below the surface
Felt
10 reports · strongest reported intensity III
Nearest
Dallas County, 19 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3225 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 10 people have reported feeling it to USGS.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 32.8824, -96.9281. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dallas County, TX 19 km (12 mi) NW of here earthquakes near Dallas County
Tarrant County, TX 36 km (22 mi) ENE of here earthquakes near Tarrant County
Denton County, TX 40 km (25 mi) SSE of here earthquakes near Denton County
Collin County, TX 48 km (30 mi) SW of here earthquakes near Collin County
Rockwall County, TX 48 km (30 mi) W of here earthquakes near Rockwall County
Ellis County, TX 61 km (38 mi) NNW of here earthquakes near Ellis County

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

Aftershocks so far

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

  1. 1.8 6 km SSE of Farmers Branch, Texas
  2. 2.2 5 km S of Farmers Branch, Texas
  3. 3.1 7 km SSW of Mansfield, Texas
  4. 3.2 7 km S of Mansfield, Texas
  5. 1.7 1 km N of Justin, Texas
  6. 2.0 4 km SSE of Haslet, Texas
  7. 2.3 1 km NW of Northlake, Texas
  8. 1.5 5 km NNE of Irving, Texas
  9. 2.3 7 km S of Mansfield, Texas
  10. 1.8 0 km S of Lake Dallas, Texas
  11. 2.3 6 km NNE of Irving, Texas
  12. 1.6 5 km SSW of Farmers Branch, Texas
  13. 1.8 7 km S of Mansfield, Texas
  14. 3.2 8 km SSW of Mansfield, Texas
  15. 2.5 4 km SSE of Rendon, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.