Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Walsenburg, CO
No earthquake was likely felt in Walsenburg in the 24 hours to 3:35 am MST (10:35 UTC). The last one was M 3.4, 63 km (39 mi) SSW, at 3:34 am MST on 8 November 2026, estimated intensity II (weak) in town; 2 felt reports to USGS. Every earthquake near Walsenburg
This page: a magnitude 1.7 earthquake was recorded 28 km (17 mi) west-southwest of Walsenburg, CO, at 9:56 am MDT on 29 July 2025 (15:56 UTC), 9.3 km deep.
USGS: 4 km W of La Veta, Colorado
93 km (58 mi) SSW of Pueblo, CO
- When
- 9:56 am MDT on 29 July 2025 ()
- Where
- 28 km (17 mi) west-southwest of Walsenburg, CO · earthquakes near Walsenburg
- Magnitude
- M 1.7 (ml)
- Depth
- 9.3 km below the surface
- Felt
- no reports yet
- Nearest
- Huerfano County, 22 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 396 days ago
Earthquake alerts for Walsenburg, CO
Get a notification in this browser when USGS records an earthquake near Walsenburg, CO. 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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 8 km (5 mi) from the epicentre. In Walsenburg, 28 km away, the estimate is intensity II (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.
How big was it?
This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 89× the energy of this one
- This earthquake M 1.7 about 11 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 2023-03-10 — about 7,900 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 37.5105, -105.0586. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Huerfano County, CO | 22 km (13 mi) | NNE | earthquakes near Huerfano County |
| Costilla County, CO | 42 km (26 mi) | SW | earthquakes near Costilla County |
| Alamosa County, CO | 65 km (40 mi) | W | earthquakes near Alamosa County |
| Custer County, CO | 71 km (44 mi) | NNW | earthquakes near Custer County |
| Pueblo County, CO | 88 km (55 mi) | NE | earthquakes near Pueblo County |
| Las Animas County, CO | 92 km (57 mi) | ESE | earthquakes near Las Animas County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
24 earthquakes have been recorded within 50 km since this one.
- 3.4 8 km SSE of Stonewall Gap, Colorado
- 1.8 10 km SW of Walsenburg, Colorado
- 1.5 10 km SW of Walsenburg, Colorado
- 2.4 10 km SW of Walsenburg, Colorado
- 2.7 8 km SW of Walsenburg, Colorado
- 2.5 12 km NNW of Walsenburg, Colorado
- 1.6 10 km SSE of Stonewall Gap, Colorado
- 2.9 5 km SSW of Walsenburg, Colorado
- 2.3 7 km SW of Walsenburg, Colorado
- 2.3 5 km SSW of Walsenburg, Colorado
- 1.5 19 km NNE of Fort Garland, Colorado
- 1.6 8 km N of Segundo, Colorado
- 1.5 19 km NNE of Stonewall Gap, Colorado
- 1.6 9 km SSE of Stonewall Gap, Colorado
- 1.7 10 km SE of Stonewall Gap, Colorado
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.