Earthquake · reviewed by a seismologist
M 3.3ml
7 km SSW of San Augustine, Texas
- When
- 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 2731 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.
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.
Where
Epicentre 31.4703, -94.1354. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| San Augustine County, TX | 10 km (6 mi) | NNE of here | earthquakes near San Augustine County |
| Sabine County, TX | 30 km (19 mi) | WNW of here | earthquakes near Sabine County |
| Shelby County, TX | 36 km (22 mi) | S of here | earthquakes near Shelby County |
| Nacogdoches County, TX | 49 km (30 mi) | ESE of here | earthquakes near Nacogdoches County |
| Angelina County, TX | 51 km (32 mi) | ENE of here | earthquakes near Angelina County |
| Sabine Parish, LA | 55 km (34 mi) | W of here | earthquakes near Sabine Parish |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
9 earthquakes have been recorded within 50 km since this one.
- 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.