QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

22 km ESE of Big Lake, Texas

· 2.0 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Irion County 31 kmReagan County 38 kmCrockett County 49 kmSchleicher County 73 kmTom Green County 79 kmSterling County 80 kmUpton County 80 kmGlasscock County 86 kmSutton County 97 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 (ml)
Depth
2.0 km below the surface
Felt
no reports yet
Nearest
Irion County, 31 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1291 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 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 31.1343, -101.2382. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Irion County, TX 31 km (19 mi) SW of here earthquakes near Irion County
Reagan County, TX 38 km (23 mi) SE of here earthquakes near Reagan County
Crockett County, TX 49 km (30 mi) NNE of here earthquakes near Crockett County
Schleicher County, TX 73 km (45 mi) WNW of here earthquakes near Schleicher County
Tom Green County, TX 79 km (49 mi) WSW of here earthquakes near Tom Green County
Sterling County, TX 80 km (50 mi) SSW of here earthquakes near Sterling County

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

Aftershocks so far

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

  1. 2.0 29 km E of Big Lake, Texas
  2. 1.5 27 km E of Big Lake, Texas
  3. 2.8 27 km E of Big Lake, Texas
  4. 2.1 25 km ESE of Big Lake, 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.