Earthquake · reviewed by a seismologist
M 3.3ml
Earthquake near San Augustine, TX
No earthquake was likely felt in San Augustine in the 24 hours to 3:51 am CST (09:51 UTC). The last one was M 2.2, 26 km (16 mi) NNE, at 12:24 am CDT on 15 October 2026, estimated intensity II (weak) in town. Every earthquake near San Augustine
This page: a magnitude 3.3 earthquake was recorded 7 km (4 mi) south-southwest of San Augustine, TX, at 5:32 am CST on 20 January 2019 (11:32 UTC), 5.0 km deep. 2 people have reported feeling it to USGS.
USGS: 7 km SSW of San Augustine, Texas
- When
- 5:32 am CST on 20 January 2019 ()
- Where
- 7 km (4 mi) south-southwest of San Augustine, TX · earthquakes near San Augustine
- Texas today
- every earthquake in Texas in the last 24 hours
- Magnitude
- M 3.3 (ml)
- Depth
- 5.0 km below the surface
- Felt
- 2 reports · strongest reported intensity II
- Nearest
- San Augustine County, 10 km SSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2777 days ago
Earthquake alerts for San Augustine, TX
Get a notification in this browser when USGS records an earthquake near San Augustine, TX. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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 234 km (145 mi) from the epicentre. In San Augustine, 7 km away, the estimate is intensity IV (light). 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.
Earthquakes near other towns within 30 km: Milam.
How big was it?
This earthquake released about 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 130,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
- Magna, Utah 2020 M 5.7 4,000× the energy of this one
- This earthquake M 3.3 about 1.3 tons of TNT
- Around the size people start to feel M 3.0 this one released 2.8× more
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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
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 31.4703, -94.1354. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Augustine County, TX | 10 km (6 mi) | SSW | earthquakes near San Augustine County |
| Sabine County, TX | 30 km (19 mi) | ESE | earthquakes near Sabine County |
| Shelby County, TX | 36 km (22 mi) | N | earthquakes near Shelby County |
| Nacogdoches County, TX | 49 km (30 mi) | WNW | earthquakes near Nacogdoches County |
| Angelina County, TX | 51 km (32 mi) | WSW | earthquakes near Angelina County |
| Sabine Parish, LA | 55 km (34 mi) | E | earthquakes near Sabine Parish |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
11 earthquakes have been recorded within 50 km since this one.
- 2.2 14 km ESE of Center, Texas
- 1.7 8 km W of Huxley, Texas
- 2.5 5 km NNW of Huntington, Texas
- 3.2 5 km WSW of Huxley, Texas
- 3.0 8 km W of Huxley, Texas
- 2.6 5 km WSW of Chireno, Texas
- 3.0 5 km WSW of Chireno, Texas
- 2.4 9 km WNW of Huxley, Texas
- 2.4 10 km W of Huxley, Texas
- 2.3 6 km SW of Huxley, Texas
- 2.6 6 km SSW of Timpson, 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.