9 km S of Cedar City, Utah

2020-12-03 20:55 UTC · 11 km deep · released about 140 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: 2020-12-03 20:55 UTC
Magnitude: M 2.4 (ml)
Depth: 11 km below the surface
Felt: 4 reports · strongest reported intensity III
Nearest: Iron County, 41 km NNW
Status: Reviewed by a seismologist

USGS · last changed by USGS 2053 days ago · we first saw it 2053 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 140 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 110,000× the energy of this one
Magna, Utah 2020 M 5.7 78,000× the energy of this one
Around the size people start to feel M 3.0 6.9× the energy of this one
This earthquake M 2.4 about 140 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 37.5958, -113.0687. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Iron County, UT	41 km (25 mi)	SSE of here	earthquakes near Iron County
Washington County, UT	52 km (33 mi)	NE of here	earthquakes near Washington County
Beaver County, UT	86 km (53 mi)	S of here	earthquakes near Beaver County
Kane County, UT	116 km (72 mi)	WNW of here	earthquakes near Kane County
Piute County, UT	116 km (72 mi)	SW of here	earthquakes near Piute County

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

Aftershocks so far

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

1.5 10 km NNW of Enoch, Utah 07:31 UTC
2.0 10 km SE of New Harmony, Utah 08:56 UTC
2.2 4 km E of New Harmony, Utah 23:11 UTC
1.7 13 km SSE of Kanarraville, Utah 06:30 UTC
1.6 10 km N of Enoch, Utah 07:29 UTC
1.5 7 km ESE of Kanarraville, Utah 03:23 UTC
1.8 8 km ENE of Kanarraville, Utah 21:44 UTC
1.8 11 km ESE of Paragonah, Utah 14:03 UTC
1.9 9 km S of Cedar City, Utah 09:30 UTC
1.6 11 km WNW of Kanarraville, Utah 07:32 UTC
1.7 12 km WNW of Kanarraville, Utah 01:59 UTC
1.8 12 km N of New Harmony, Utah 01:51 UTC
1.6 12 km N of New Harmony, Utah 01:41 UTC
2.0 12 km WNW of Kanarraville, Utah 01:05 UTC
1.5 12 km WNW of Kanarraville, Utah 01:01 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 16:23 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.