QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4 km ENE of Christine, Texas

· 7.1 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Atascosa County 14 kmMcMullen County 48 kmWilson County 55 kmLive Oak County 58 kmKarnes County 59 kmFrio County 65 kmBexar County 73 kmLa Salle County 81 kmBee County 81 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
7.1 km below the surface
Felt
no reports yet
Nearest
Atascosa County, 14 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 452 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 28.7960, -98.4460. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Atascosa County, TX 14 km (9 mi) SE of here earthquakes near Atascosa County
McMullen County, TX 48 km (30 mi) NNE of here earthquakes near McMullen County
Wilson County, TX 55 km (34 mi) SW of here earthquakes near Wilson County
Live Oak County, TX 58 km (36 mi) NNW of here earthquakes near Live Oak County
Karnes County, TX 59 km (37 mi) WSW of here earthquakes near Karnes County
Frio County, TX 65 km (40 mi) E of here earthquakes near Frio County

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

Aftershocks so far

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

  1. 2.2 7 km SSW of Falls City, Texas
  2. 2.2 6 km SW of Falls City, Texas
  3. 1.6 7 km SSW of Falls City, Texas
  4. 2.3 7 km SSW of Falls City, Texas
  5. 3.7 8 km SW of Falls City, Texas
  6. 1.7 2 km SE of Falls City, Texas
  7. 1.7 2 km SE of Falls City, Texas
  8. 1.7 2 km SE of Falls City, Texas
  9. 2.0 6 km ENE of Christine, Texas
  10. 1.5 2 km ESE of Falls City, Texas
  11. 1.6 2 km ESE of Falls City, Texas
  12. 1.5 7 km NNE of Christine, Texas
  13. 1.7 5 km E of Christine, Texas
  14. 2.2 4 km E of Christine, Texas
  15. 1.6 8 km SSW 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 2,000 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.