Earthquake · reviewed by a seismologist
M 2.9ml
8 km NNW of Chacra, Colorado
- When
- Magnitude
- M 2.9 (ml)
- Depth
- 4.7 km below the surface
- Felt
- 26 reports · strongest reported intensity III
- Nearest
- Garfield County, 37 km W
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1365 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 26 people have reported feeling it to USGS.
How big was it?
This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
- Magna, Utah 2020 M 5.7 16,000× the energy of this one
- Around the size people start to feel M 3.0 1.4× the energy of this one
- This earthquake M 2.9 about 680 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 39.6415, -107.4845. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Garfield County, CO | 37 km (23 mi) | E of here | earthquakes near Garfield County |
| Eagle County, CO | 68 km (42 mi) | W of here | earthquakes near Eagle County |
| Pitkin County, CO | 68 km (42 mi) | NW of here | earthquakes near Pitkin County |
| Rio Blanco County, CO | 71 km (44 mi) | ESE of here | earthquakes near Rio Blanco County |
| Delta County, CO | 93 km (58 mi) | NNE of here | earthquakes near Delta County |
| Routt County, CO | 103 km (64 mi) | SSW of here | earthquakes near Routt County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
8 earthquakes have been recorded within 50 km since this one.
- 2.2 10 km NW of Dotsero, Colorado
- 2.5 30 km NNW of Dotsero, Colorado
- 2.6 12 km S of Mulford, Colorado
- 2.1 6 km NNW of Chacra, Colorado
- 2.5 22 km NNW of New Castle, Colorado
- 2.9 6 km NNE of Chacra, Colorado
- 2.5 7 km NNW of Chacra, Colorado
- 2.6 6 km NNW of Chacra, 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.