Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near Montrose, CO
No earthquake was likely felt in Montrose in the 24 hours to 12:21 pm MST (19:21 UTC). The last one was M 5.0, 675 km (419 mi) ESE, at 4:21 am MDT on 23 July 2026, estimated intensity II (weak) in town; 499 felt reports to USGS. Every earthquake near Montrose
This page: a magnitude 1.8 earthquake was recorded 38 km (23 mi) south-southwest of Montrose, CO, at 3:03 am MST on 20 December 2024 (10:03 UTC), 5.0 km deep.
USGS: 16 km WSW of Loghill Village, Colorado
- When
- 3:03 am MST on 20 December 2024 ()
- Where
- 38 km (23 mi) south-southwest of Montrose, CO · earthquakes near Montrose
- Magnitude
- M 1.8 (ml)
- Depth
- 5.0 km below the surface
- Felt
- no reports yet
- Nearest
- Ouray County, 15 km E
- Nearest mapped fault
- Busted Boiler fault, 12 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 622 days ago
Earthquake alerts for Montrose, CO
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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 13 km (8 mi) from the epicentre. In Montrose, 38 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.
Earthquakes near other towns within 30 km: Mountain Village, Telluride, Ouray.
How big was it?
This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 710,000× the energy of this one
- Around the size people start to feel M 3.0 63× the energy of this one
- This earthquake M 1.8 about 15 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:
- 5.5 15 km E of Colona, Colorado · 36 km ENE 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 38.1456, -107.9613. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Ouray County, CO | 15 km (9 mi) | E | earthquakes near Ouray County |
| Montrose County, CO | 39 km (25 mi) | NW | earthquakes near Montrose County |
| San Miguel County, CO | 44 km (27 mi) | WSW | earthquakes near San Miguel County |
| San Juan County, CO | 48 km (30 mi) | SSE | earthquakes near San Juan County |
| Hinsdale County, CO | 63 km (39 mi) | SE | earthquakes near Hinsdale County |
| Dolores County, CO | 66 km (41 mi) | SW | earthquakes near Dolores 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.