QuakeIndex

mining explosion · reviewed by a seismologist

M 2.2ml

24 km NNW of Morenci, Arizona

· 0.0 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Greenlee County 19 kmGraham County 58 kmGrant County 116 kmCatron County 118 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 2.2 (ml)
Depth
0.0 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Greenlee County, 19 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1990 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 6 people have reported feeling it to USGS.

USGS catalogues this as mining explosion, not an earthquake.

How big was it?

This earthquake released about 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 33.2932, -109.4328. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Greenlee County, AZ 19 km (12 mi) WNW of here earthquakes near Greenlee County
Graham County, AZ 58 km (36 mi) NE of here earthquakes near Graham County
Grant County, NM 116 km (72 mi) WNW of here earthquakes near Grant County
Catron County, NM 118 km (73 mi) SW of here earthquakes near Catron County

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

Aftershocks so far

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

  1. 2.8 0 km NE of Clifton, Arizona
  2. 2.6 9 km N of San Jose, Arizona
  3. 2.6 2 km NNE of Morenci, Arizona

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.