Earthquake · reviewed by a seismologist
M 2.8ml
18 km S of Marathon, Texas
Yes. A magnitude 2.8 earthquake was recorded 18 km S of Marathon, Texas, at 4:47 am CST on 6 December 2025 (10:47 UTC), less than 1 km deep.
- When
- Texas today
- every earthquake in Texas in the last 24 hours
- Magnitude
- M 2.8 (ml)
- Depth
- 1.0 km below the surface
- Felt
- no reports yet
- Nearest
- Brewster County, 25 km S
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 253 days ago
Earthquake alerts for Alpine, TX
Get a notification in this browser when USGS records an earthquake near Alpine, 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 62 km (39 mi) from the epicentre. 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.
How big was it?
This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
- Magna, Utah 2020 M 5.7 22,000× the energy of this one
- Around the size people start to feel M 3.0 2× the energy of this one
- This earthquake M 2.8 about 480 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.7 13 km NW of Marathon, Texas · 29 km NNW of this epicentre
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 30.0380, -103.2640. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Brewster County, TX | 25 km (16 mi) | S | earthquakes near Brewster County |
| Presidio County, TX | 96 km (60 mi) | W | earthquakes near Presidio County |
| Pecos County, TX | 97 km (60 mi) | NNE | earthquakes near Pecos County |
| Jeff Davis County, TX | 110 km (69 mi) | NW | earthquakes near Jeff Davis County |
| Terrell County, TX | 117 km (72 mi) | E | earthquakes near Terrell County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
No further earthquakes have been recorded within 50 km since this one.
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.