QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

5 km ENE of El Moro, Colorado

· 5.0 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Las Animas County 34 kmHuerfano County 70 kmColfax County 72 kmCostilla County 90 kmOtero County 94 kmPueblo County 103 kmUnion County 117 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 1.7 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Las Animas County, 34 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1113 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 37.2349, -104.4092. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Animas County, CO 34 km (21 mi) WSW of here earthquakes near Las Animas County
Huerfano County, CO 70 km (43 mi) SE of here earthquakes near Huerfano County
Colfax County, NM 72 km (45 mi) NNE of here earthquakes near Colfax County
Costilla County, CO 90 km (56 mi) E of here earthquakes near Costilla County
Otero County, CO 94 km (59 mi) SW of here earthquakes near Otero County
Pueblo County, CO 103 km (64 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

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

  1. 2.8 9 km NNW of El Moro, Colorado
  2. 1.7 11 km NE of Stonewall Gap, Colorado
  3. 1.7 6 km WNW of Hoehne, Colorado
  4. 1.7 10 km SE of Walsenburg, Colorado
  5. 1.7 11 km SSE of Walsenburg, Colorado
  6. 1.6 12 km S of Weston, Colorado
  7. 1.5 10 km SSE of Walsenburg, Colorado
  8. 2.2 Colorado
  9. 1.6 Colorado
  10. 1.6 9 km WNW of Hoehne, Colorado
  11. 2.8 7 km NNW of El Moro, Colorado
  12. 1.5 Colorado
  13. 1.5 8 km N of Segundo, Colorado
  14. 1.5 9 km NNW of El Moro, Colorado
  15. 1.7 9 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 7,900 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.