QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

11 km ESE of Boone, Colorado

· 5.0 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pueblo County 32 kmCrowley County 33 kmOtero County 53 kmEl Paso County 75 kmHuerfano County 94 kmBent County 98 kmLincoln County 101 kmLas Animas County 101 kmCuster County 109 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 1.8 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Pueblo County, 32 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 178 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 38.2276, -104.1335. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pueblo County, CO 32 km (20 mi) ENE of here earthquakes near Pueblo County
Crowley County, CO 33 km (20 mi) WSW of here earthquakes near Crowley County
Otero County, CO 53 km (33 mi) NW of here earthquakes near Otero County
El Paso County, CO 75 km (47 mi) SSE of here earthquakes near El Paso County
Huerfano County, CO 94 km (58 mi) NE of here earthquakes near Huerfano County
Bent County, CO 98 km (61 mi) WNW of here earthquakes near Bent County

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

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 1.7 16 km NNW of Olney Springs, 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.