QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

Earthquake near Glenwood Springs, CO

USGS: 6 km NW of No Name, Colorado

2:50 am MST, Nov 27, 2018 · · 5.0 km deep · released about 170 lb of TNT

Every earthquake near Glenwood Springs Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Garfield County 49 kmEagle County 55 kmPitkin County 57 kmRio Blanco County 84 kmDelta County 95 kmLake County 96 kmRoutt County 102 kmSummit County 103 kmGunnison County 107 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
2:50 am MST on 27 November 2018 ()
Where
7 km (4 mi) N of Glenwood Springs, CO · earthquakes near Glenwood Springs
Magnitude
M 2.5 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Garfield County, 49 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2792 days ago

A magnitude 2.5 earthquake was recorded 7 km (4 mi) N of Glenwood Springs, CO, at 2:50 am MST on 27 November 2018 (09:50 UTC). This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

Earthquakes near other towns within 30 km: New Castle, Carbondale, Silt.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 since 1900 lists no earthquake of M5 or more within 50 km.

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 39.6102, -107.3370. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Garfield County, CO 49 km (31 mi) W earthquakes near Garfield County
Eagle County, CO 55 km (34 mi) E earthquakes near Eagle County
Pitkin County, CO 57 km (35 mi) SE earthquakes near Pitkin County
Rio Blanco County, CO 84 km (52 mi) WNW earthquakes near Rio Blanco County
Delta County, CO 95 km (59 mi) SSW earthquakes near Delta County
Lake County, CO 96 km (60 mi) ESE earthquakes near Lake County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

28 earthquakes have been recorded within 50 km since this one.

  1. 2.2 10 km NW of Dotsero, Colorado
  2. 2.8 10 km NE of Redstone, Colorado
  3. 2.5 30 km NNW of Dotsero, Colorado
  4. 2.6 12 km S of Mulford, Colorado
  5. 2.1 6 km NNW of Chacra, Colorado
  6. 2.5 22 km NNW of New Castle, Colorado
  7. 2.9 6 km NNE of Chacra, Colorado
  8. 2.5 7 km NNW of Chacra, Colorado
  9. 2.6 6 km NNW of Chacra, Colorado
  10. 2.9 8 km NNW of Chacra, Colorado
  11. 2.1 9 km NNE of New Castle, Colorado
  12. 2.5 6 km NNW of Gypsum, Colorado
  13. 1.8 2 km NNW of El Jebel, Colorado
  14. 1.7 15 km NW of Dotsero, Colorado
  15. 2.0 6 km E of Basalt, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.