QuakeIndex

rock burst · reviewed by a seismologist

M 3.4ml

8 km NE of Paonia, Colorado

· 1.0 km deep · released about 1.9 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Delta County 31 kmGunnison County 49 kmPitkin County 62 kmMesa County 82 kmGarfield County 83 kmMontrose County 86 kmOuray County 88 kmLake County 106 kmEagle County 106 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
Magnitude
M 3.4 (ml)
Depth
1.0 km below the surface
Felt
no reports yet
Measured shaking
intensity IV (ShakeMap)
Nearest
Delta County, 31 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2091 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

USGS catalogues this as rock burst, not an earthquake.

How big was it?

This earthquake released about 1.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 89,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,800× the energy of this one
  4. This earthquake M 3.4 about 1.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4× more

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 38.9181, -107.5181. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Delta County, CO 31 km (19 mi) ENE of here earthquakes near Delta County
Gunnison County, CO 49 km (30 mi) NW of here earthquakes near Gunnison County
Pitkin County, CO 62 km (38 mi) WSW of here earthquakes near Pitkin County
Mesa County, CO 82 km (51 mi) E of here earthquakes near Mesa County
Garfield County, CO 83 km (52 mi) SSE of here earthquakes near Garfield County
Montrose County, CO 86 km (54 mi) NE of here earthquakes near Montrose County

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

Aftershocks so far

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

  1. 2.8 10 km NE of Redstone, Colorado
  2. 1.5 13 km ENE of Paonia, Colorado
  3. 1.9 11 km E of Paonia, Colorado
  4. 1.6 9 km ESE of Paonia, Colorado
  5. 1.8 11 km NNE of Paonia, Colorado
  6. 2.4 9 km NW of Mount Crested Butte, Colorado
  7. 1.9 10 km SE of Crystal, Colorado
  8. 2.1 3 km NNW of Mount Crested Butte, Colorado
  9. 1.9 10 km NNW of Mount Crested Butte, Colorado
  10. 1.6 3 km WNW of Crystal, Colorado
  11. 2.9 17 km E of Paonia, Colorado
  12. 2.4 3 km WNW of Marble, Colorado
  13. 1.6 7 km SSW of Redstone, Colorado
  14. 1.7 7 km WNW of Marble, Colorado
  15. 2.5 5 km W of Marble, 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

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