QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7mb_lg

Earthquake near Three Rivers, TX

Yes: an earthquake was likely felt in Three Rivers in the last 24 hours. M 3.2, 87 km (54 mi) WNW of Three Rivers, at 3:20 am CST on 12 November 2026 (09:20 UTC); the estimated shaking in Three Rivers was intensity II (weak). Every earthquake near Three Rivers

This page: a magnitude 2.7 earthquake was recorded 9 km (5 mi) north of Three Rivers, TX, at 7:37 am CDT on 31 October 2019 (12:37 UTC), 5.0 km deep.

USGS: 8 km N of Three Rivers, Texas

7:37 am CDT, Oct 31, 2019 · · 5.0 km deep · released about 340 lb of TNT

10 km30 km60 km120 km N Live Oak County 21 kmBee County 43 kmMcMullen County 44 kmKarnes County 51 kmAtascosa County 53 kmWilson County 71 kmGoliad County 73 kmSan Patricio County 86 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
7:37 am CDT on 31 October 2019 ()
Where
9 km (5 mi) north of Three Rivers, TX · earthquakes near Three Rivers
Texas today
every earthquake in Texas in the last 24 hours
Magnitude
M 2.7 (mb_lg)
Depth
5.0 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 498 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 56 km (35 mi) from the epicentre. In Three Rivers, 9 km away, the estimate is intensity III (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Three Rivers 9 km, intensity III · Karnes City 47 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.0 on 2018-05-01 — about 89 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 28.5370, -98.1654. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Live Oak County, TX 21 km (13 mi) S earthquakes near Live Oak County
Bee County, TX 43 km (27 mi) ESE earthquakes near Bee County
McMullen County, TX 44 km (27 mi) WSW earthquakes near McMullen County
Karnes County, TX 51 km (32 mi) NE earthquakes near Karnes County
Atascosa County, TX 53 km (33 mi) NW earthquakes near Atascosa County
Wilson County, TX 71 km (44 mi) N earthquakes near Wilson County

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

Aftershocks so far

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

  1. 1.7 9 km WSW of Falls City, Texas
  2. 2.2 10 km WSW of Falls City, Texas
  3. 2.2 9 km WSW of Falls City, Texas
  4. 1.7 9 km WSW of Falls City, Texas
  5. 2.0 10 km WSW of Falls City, Texas
  6. 1.6 11 km WSW of Falls City, Texas
  7. 2.8 13 km WSW of Falls City, Texas
  8. 2.6 12 km SW of Falls City, Texas
  9. 2.6 8 km WSW of Falls City, Texas
  10. 1.8 10 km SW of Falls City, Texas
  11. 1.7 10 km WSW of Falls City, Texas
  12. 2.0 9 km SW of Falls City, Texas
  13. 2.1 10 km SW of Falls City, Texas
  14. 1.8 9 km WSW of Falls City, Texas
  15. 1.8 9 km SW 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.

On USGS

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