QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

12 km SSE of Walsenburg, Colorado

· 9.4 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Huerfano County 27 kmLas Animas County 65 kmCostilla County 66 kmPueblo County 76 kmCuster County 86 kmAlamosa County 92 kmOtero County 99 kmColfax County 101 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 2.6 (ml)
Depth
9.4 km below the surface
Felt
no reports yet
Nearest
Huerfano County, 27 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1045 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 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 37.5145, -104.7414. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Huerfano County, CO 27 km (17 mi) SE of here earthquakes near Huerfano County
Las Animas County, CO 65 km (41 mi) WNW of here earthquakes near Las Animas County
Costilla County, CO 66 km (41 mi) ENE of here earthquakes near Costilla County
Pueblo County, CO 76 km (47 mi) SSW of here earthquakes near Pueblo County
Custer County, CO 86 km (53 mi) SE of here earthquakes near Custer County
Alamosa County, CO 92 km (57 mi) E of here earthquakes near Alamosa County

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

Aftershocks so far

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

  1. 2.4 8 km NNW of El Moro, Colorado
  2. 1.6 6 km W of Hoehne, Colorado
  3. 1.8 10 km NNW of El Moro, Colorado
  4. 1.5 7 km NNW of El Moro, Colorado
  5. 1.9 9 km NNW of El Moro, Colorado
  6. 2.0 9 km NNW of El Moro, Colorado
  7. 1.7 5 km NW of El Moro, Colorado
  8. 2.0 9 km NNW of El Moro, Colorado
  9. 1.7 10 km NNW of El Moro, Colorado
  10. 1.5 9 km NNW of El Moro, Colorado
  11. 1.7 17 km W of Aguilar, Colorado
  12. 1.8 8 km NNW of El Moro, Colorado
  13. 1.6 10 km NNW of El Moro, Colorado
  14. 1.9 10 km NNW of El Moro, Colorado
  15. 2.5 6 km NNW of El Moro, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2023-03-10 — it released about 350 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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