Earthquake · reviewed by a seismologist
M 2.9ml
7 km NE of Greeley, Colorado
- When
- Magnitude
- M 2.9 (ml)
- Depth
- 6.5 km below the surface
- Felt
- no reports yet
- Nearest
- Weld County, 23 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2667 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
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 40.4634, -104.6310. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Weld County, CO | 23 km (14 mi) | WSW of here | earthquakes near Weld County |
| Broomfield County, CO | 67 km (42 mi) | NNE of here | earthquakes near Broomfield County |
| Adams County, CO | 70 km (44 mi) | NNW of here | earthquakes near Adams County |
| Morgan County, CO | 73 km (45 mi) | WNW of here | earthquakes near Morgan County |
| Larimer County, CO | 75 km (47 mi) | ESE of here | earthquakes near Larimer County |
| Boulder County, CO | 77 km (48 mi) | ENE of here | earthquakes near Boulder County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
3 earthquakes have been recorded within 50 km since this one.
- 2.3 2 km SW of Gilcrest, Colorado
- 2.3 4 km ENE of Greeley, Colorado
- 1.9 8 km ENE of Greeley, 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.