Earthquake · reviewed by a seismologist
M 2.1ml
Earthquake near Big Spring, TX
USGS: 24 km SSW of Westbrook, Texas
98 km (61 mi) E of Midland, TX
- When
- 1:27 pm CDT on 29 September 2026 ()
- Where
- 39 km (24 mi) ESE of Big Spring, TX · earthquakes near Big Spring
- Magnitude
- M 2.1 (ml)
- Depth
- 5.7 km below the surface
- Felt
- no reports yet
- Nearest
- Mitchell County, 24 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3 days ago
A magnitude 2.1 earthquake was recorded 39 km (24 mi) ESE of Big Spring, TX, at 1:27 pm CDT on 29 September 2026 (18:27 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
- Magna, Utah 2020 M 5.7 250,000× the energy of this one
- Around the size people start to feel M 3.0 22× the energy of this one
- This earthquake M 2.1 about 43 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 4.3 on 2025-10-12 — about 2,000 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 32.1410, -101.0860. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Mitchell County, TX | 24 km (15 mi) | NE | earthquakes near Mitchell County |
| Sterling County, TX | 34 km (21 mi) | S | earthquakes near Sterling County |
| Howard County, TX | 38 km (23 mi) | WNW | earthquakes near Howard County |
| Glasscock County, TX | 51 km (32 mi) | SW | earthquakes near Glasscock County |
| Coke County, TX | 52 km (32 mi) | SE | earthquakes near Coke County |
| Nolan County, TX | 66 km (41 mi) | ENE | earthquakes near Nolan County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
2 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.