Earthquake · reviewed by a seismologist
M 2.3ml
3 km SW of Cotopaxi, Colorado
- When
- Magnitude
- M 2.3 (ml)
- Depth
- 5.0 km below the surface
- Felt
- 2 reports · strongest reported intensity III
- Nearest
- Fremont County, 28 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2062 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.
How big was it?
This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
- Magna, Utah 2020 M 5.7 130,000× the energy of this one
- Around the size people start to feel M 3.0 11× the energy of this one
- This earthquake M 2.3 about 85 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.
Where
Epicentre 38.3423, -105.7124. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Fremont County, CO | 28 km (17 mi) | WSW of here | earthquakes near Fremont County |
| Custer County, CO | 40 km (25 mi) | NW of here | earthquakes near Custer County |
| Saguache County, CO | 57 km (36 mi) | NE of here | earthquakes near Saguache County |
| Chaffee County, CO | 67 km (42 mi) | SE of here | earthquakes near Chaffee County |
| Teller County, CO | 74 km (46 mi) | SW of here | earthquakes near Teller County |
| Alamosa County, CO | 86 km (54 mi) | N of here | earthquakes near Alamosa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
5 earthquakes have been recorded within 50 km since this one.
- 2.4 17 km NE of Saguache, Colorado
- 2.5 19 km WNW of Cañon City, Colorado
- 1.5 2 km SE of Maysville, Colorado
- 1.5 9 km N of Cotopaxi, Colorado
- 1.5 2 km SSE of Cotopaxi, 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.