15 km S of Thompson Springs, Utah

2019-12-01 05:56 UTC · 7.2 km deep · released about 150 lb 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: 2019-12-01 05:56 UTC
Magnitude: M 2.5 (ml)
Depth: 7.2 km below the surface
Felt: no reports yet
Nearest: Grand County, 21 km NE
Status: Reviewed by a seismologist

USGS · last changed by USGS 2413 days ago · we first saw it 2413 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 150 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 100,000× the energy of this one
Magna, Utah 2020 M 5.7 72,000× the energy of this one
Around the size people start to feel M 3.0 6.5× the energy of this one
This earthquake M 2.5 about 150 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

Map loads when it scrolls into view

Epicentre 38.8367, -109.7340. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Grand County, UT	21 km (13 mi)	SW of here	earthquakes near Grand County
Emery County, UT	88 km (54 mi)	ESE of here	earthquakes near Emery County
Mesa County, CO	112 km (70 mi)	W of here	earthquakes near Mesa County
Carbon County, UT	119 km (74 mi)	SE of here	earthquakes near Carbon County
Wayne County, UT	127 km (79 mi)	ENE of here	earthquakes near Wayne County
San Miguel County, CO	146 km (91 mi)	NW of here	earthquakes near San Miguel County

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

Aftershocks so far

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

1.9 11 km SW of Moab, Utah 13:42 UTC
1.7 14 km SW of Moab, Utah 07:56 UTC
1.7 Utah 17:07 UTC
2.1 28 km NNE of Castle Valley, Utah 08:31 UTC
1.9 28 km NNE of Castle Valley, Utah 10:31 UTC
1.7 27 km NNE of Castle Valley, Utah 05:45 UTC
1.6 34 km E of Thompson Springs, Utah 15:02 UTC
1.8 27 km NNE of Castle Valley, Utah 12:17 UTC
1.6 28 km NNE of Castle Valley, Utah 07:39 UTC
1.8 27 km NNE of Castle Valley, Utah 16:49 UTC
1.9 27 km NNE of Castle Valley, Utah 16:31 UTC
1.7 29 km NNE of Castle Valley, Utah 14:49 UTC
1.6 27 km NNE of Castle Valley, Utah 05:09 UTC
1.6 28 km NNE of Castle Valley, Utah 22:02 UTC
1.5 27 km NNE of Castle Valley, Utah 17:03 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 09:10 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.