QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

9 km NNE of Three Rivers, Texas

· 7.2 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Live Oak County 21 kmBee County 42 kmMcMullen County 46 kmKarnes County 50 kmAtascosa County 54 kmWilson County 70 kmGoliad County 71 kmSan Patricio County 85 kmJim Wells County 90 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 1.9 (ml)
Depth
7.2 km below the surface
Felt
no reports yet
Nearest
Live Oak County, 21 km S
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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 28.5440, -98.1450. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Live Oak County, TX 21 km (13 mi) N of here earthquakes near Live Oak County
Bee County, TX 42 km (26 mi) WNW of here earthquakes near Bee County
McMullen County, TX 46 km (29 mi) ENE of here earthquakes near McMullen County
Karnes County, TX 50 km (31 mi) SW of here earthquakes near Karnes County
Atascosa County, TX 54 km (34 mi) SE of here earthquakes near Atascosa County
Wilson County, TX 70 km (44 mi) S of here earthquakes near Wilson County

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

Aftershocks so far

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

  1. 2.0 13 km WSW of Falls City, Texas
  2. 1.7 12 km WSW of Falls City, Texas
  3. 2.2 13 km WSW of Falls City, Texas
  4. 2.0 13 km WSW of Falls City, Texas
  5. 1.7 12 km WSW of Falls City, Texas
  6. 2.1 12 km WSW of Falls City, Texas
  7. 1.9 20 km SW of Falls City, Texas
  8. 1.7 20 km SW of Falls City, Texas
  9. 2.6 20 km SW of Falls City, Texas
  10. 1.8 13 km NE of Tilden, Texas
  11. 2.0 26 km SW of Falls City, Texas
  12. 1.8 5 km WSW of Falls City, Texas
  13. 2.3 2 km SE of Falls City, Texas
  14. 1.8 13 km SW of Falls City, Texas
  15. 2.7 8 km N of Three Rivers, 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 1,400 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.