3 km ESE of Colorado City, Arizona

2022-11-06 11:39 UTC · 16 km deep · released about 7.1 tons of TNT

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: 2022-11-06 11:39 UTC
Magnitude: M 3.8 (ml)
Depth: 16 km below the surface
Felt: 237 reports · strongest reported intensity III
Measured shaking: intensity IV (ShakeMap)
Nearest: Washington County, 57 km WNW
Status: Reviewed by a seismologist

USGS · last changed by USGS 1144 days ago · we first saw it 1144 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 237 people have reported feeling it to USGS.

How big was it?

This earthquake released about 7.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

Northridge, California 1994 M 6.7 24,000× the energy of this one
Mineral, Virginia 2011 M 5.8 1,100× the energy of this one
Magna, Utah 2020 M 5.7 760× the energy of this one
This earthquake M 3.8 about 7.1 tons of TNT
Around the size people start to feel M 3.0 this one released 15× 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

Map loads when it scrolls into view

Epicentre 36.9838, -112.9427. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Washington County, UT	57 km (36 mi)	ESE of here	earthquakes near Washington County
Kane County, UT	105 km (65 mi)	WSW of here	earthquakes near Kane County
Iron County, UT	108 km (67 mi)	SSE of here	earthquakes near Iron County

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

Aftershocks so far

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

2.0 12 km ESE of Fredonia, Arizona 11:05 UTC
1.9 12 km ESE of Fredonia, Arizona 01:58 UTC
1.7 11 km SE of Fredonia, Arizona 19:38 UTC
1.9 11 km SE of Fredonia, Arizona 18:44 UTC
1.9 11 km ESE of Fredonia, Arizona 07:37 UTC
1.9 12 km ESE of Fredonia, Arizona 07:20 UTC
2.1 12 km ESE of Fredonia, Arizona 11:06 UTC
1.8 Arizona 09:14 UTC
2.1 9 km E of Springdale, Utah 17:02 UTC
1.8 8 km E of Fredonia, Arizona 04:35 UTC
1.7 9 km E of Springdale, Utah 03:19 UTC
1.9 9 km E of Springdale, Utah 04:26 UTC
1.7 9 km E of Springdale, Utah 20:31 UTC
1.8 Utah 14:02 UTC
1.9 14 km E of Springdale, Utah 00:09 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 17:07 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

The official USGS event page — the source of record for every value above
Did you feel it? Report it to USGS — reports go to USGS, not to us
ShakeMap for this event, when USGS has produced one

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