Earthquake · reviewed by a seismologist
M 2.7ml
7 km SE of Erie, Colorado
- When
- Magnitude
- M 2.7 (ml)
- Depth
- 8.9 km below the surface
- Felt
- 641 reports · strongest reported intensity IV
- Nearest
- Broomfield County, 8 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 396 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 641 people have reported feeling it to USGS.
How big was it?
This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
- Magna, Utah 2020 M 5.7 32,000× the energy of this one
- Around the size people start to feel M 3.0 2.8× the energy of this one
- This earthquake M 2.7 about 340 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 40.0059, -104.9794. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Broomfield County, CO | 8 km (5 mi) | NE of here | earthquakes near Broomfield County |
| Denver County, CO | 28 km (18 mi) | NNW of here | earthquakes near Denver County |
| Boulder County, CO | 37 km (23 mi) | ESE of here | earthquakes near Boulder County |
| Gilpin County, CO | 50 km (31 mi) | ENE of here | earthquakes near Gilpin County |
| Jefferson County, CO | 53 km (33 mi) | NNE of here | earthquakes near Jefferson County |
| Adams County, CO | 57 km (35 mi) | WNW of here | earthquakes near Adams County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
1 earthquake has 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.