QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

23 km WNW of Pawnee, Texas

· 8.0 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Atascosa County 35 kmKarnes County 41 kmLive Oak County 44 kmWilson County 50 kmMcMullen County 53 kmBee County 59 kmGoliad County 78 kmBexar County 84 kmFrio County 87 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 2.5 (ml)
Depth
8.0 km below the surface
Felt
no reports yet
Nearest
Atascosa County, 35 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 452 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 28.7420, -98.2250. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Atascosa County, TX 35 km (21 mi) ESE of here earthquakes near Atascosa County
Karnes County, TX 41 km (25 mi) WSW of here earthquakes near Karnes County
Live Oak County, TX 44 km (28 mi) NNW of here earthquakes near Live Oak County
Wilson County, TX 50 km (31 mi) SSW of here earthquakes near Wilson County
McMullen County, TX 53 km (33 mi) NE of here earthquakes near McMullen County
Bee County, TX 59 km (37 mi) NW of here earthquakes near Bee County

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

Aftershocks so far

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

  1. 2.2 12 km NNE of Three Rivers, Texas
  2. 2.1 12 km ENE of Falls City, Texas
  3. 2.8 13 km NNE of Karnes City, Texas
  4. 1.6 11 km ENE of Falls City, Texas
  5. 2.1 11 km ENE of Falls City, Texas
  6. 1.5 13 km W of Pawnee, Texas
  7. 2.2 14 km NNE of Three Rivers, Texas
  8. 1.9 11 km N of Three Rivers, Texas
  9. 2.0 9 km NNE of Three Rivers, Texas
  10. 2.3 8 km N of Three Rivers, Texas
  11. 1.9 9 km N of Three Rivers, Texas
  12. 1.5 3 km ESE of Falls City, Texas
  13. 2.7 16 km ENE of Falls City, Texas
  14. 1.9 4 km ESE of Falls City, Texas
  15. 1.7 1 km NNW of Falls City, 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 2018-05-01 — it released about 180 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.