QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4mwr

7 km NNW of El Moro, Colorado

· 6.5 km deep · released about 1.9 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Las Animas County 40 kmHuerfano County 61 kmColfax County 76 kmCostilla County 83 kmOtero County 95 kmPueblo County 98 kmAlamosa County 119 kmCuster County 120 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 (mwr)
Depth
6.5 km below the surface
Felt
16 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Las Animas County, 40 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1128 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 16 people have reported feeling it to USGS.

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 37.2824, -104.4938. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Animas County, CO 40 km (25 mi) W of here earthquakes near Las Animas County
Huerfano County, CO 61 km (38 mi) SE of here earthquakes near Huerfano County
Colfax County, NM 76 km (47 mi) N of here earthquakes near Colfax County
Costilla County, CO 83 km (51 mi) E of here earthquakes near Costilla County
Otero County, CO 95 km (59 mi) SW of here earthquakes near Otero County
Pueblo County, CO 98 km (61 mi) S of here earthquakes near Pueblo County

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

Aftershocks so far

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

  1. 1.7 12 km SSE of Stonewall Gap, Colorado
  2. 1.5 7 km N of El Moro, Colorado
  3. 1.9 11 km SSE of Stonewall Gap, Colorado
  4. 1.6 15 km SSW of Weston, Colorado
  5. 1.7 18 km S of Weston, Colorado
  6. 1.5 Colorado
  7. 3.0 Colorado
  8. 3.2 9 km N of Segundo, Colorado
  9. 1.5 New Mexico
  10. 1.9 23 km S of Segundo, Colorado
  11. 1.5 New Mexico
  12. 1.6 23 km SSW of Segundo, Colorado
  13. 2.3 7 km N of Segundo, Colorado
  14. 2.0 20 km S of Weston, Colorado
  15. 2.2 7 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 22 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.