Earthquake · reviewed by a seismologist
M 2.3ml
Earthquake near Mount Pleasant, UT
No earthquake was likely felt in Mount Pleasant in the 24 hours to 4:53 pm MST (23:53 UTC). The last one was M 2.3, 5 km (3 mi) ENE, at 5:07 pm MDT on 12 August 2026, estimated intensity III (weak) in town. Every earthquake near Mount Pleasant
This page: a magnitude 2.3 earthquake was recorded 20 km (12 mi) east-southeast of Mount Pleasant, UT, at 3:38 am MST on 21 December 2021 (10:38 UTC), 3.4 km deep.
USGS: 19 km ESE of Mount Pleasant, Utah
94 km (58 mi) SSE of Provo, UT
- When
- 3:38 am MST on 21 December 2021 ()
- Where
- 20 km (12 mi) east-southeast of Mount Pleasant, UT · earthquakes near Mount Pleasant
- Magnitude
- M 2.3 (ml)
- Depth
- 3.4 km below the surface
- Felt
- no reports yet
- Nearest
- Sanpete County, 29 km WSW
- Nearest mapped fault
- Snow Lake graben, 20 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1787 days ago
Earthquake alerts for Mount Pleasant, UT
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 19 km (12 mi) from the epicentre. In Mount Pleasant, 20 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Spring City, Fairview, Huntington, Moroni.
How big was it?
This earthquake released about 82 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
- Magna, Utah 2020 M 5.7 130,000× the energy of this one
- Around the size people start to feel M 3.0 12× the energy of this one
- This earthquake M 2.3 about 82 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.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.2 13 km ESE of Castle Dale, Utah · 47 km SE of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 39.4527, -111.2583. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Sanpete County, UT | 29 km (18 mi) | WSW | earthquakes near Sanpete County |
| Carbon County, UT | 62 km (39 mi) | ENE | earthquakes near Carbon County |
| Emery County, UT | 68 km (42 mi) | SE | earthquakes near Emery County |
| Utah County, UT | 82 km (51 mi) | NNW | earthquakes near Utah County |
| Sevier County, UT | 92 km (57 mi) | SSW | earthquakes near Sevier County |
| Wasatch County, UT | 98 km (61 mi) | N | earthquakes near Wasatch County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
46 earthquakes have been recorded within 50 km since this one.
- 1.5 18 km E of Mayfield, Utah
- 1.6 19 km E of Mayfield, Utah
- 1.8 6 km SW of Hiawatha, Utah
- 1.6 8 km N of Helper, Utah
- 1.9 21 km E of Mayfield, Utah
- 2.1 5 km N of Kenilworth, Utah
- 2.2 10 km ESE of Fairview, Utah
- 1.5 16 km ESE of Castle Dale, Utah
- 1.9 21 km E of Mayfield, Utah
- 1.6 18 km W of Hiawatha, Utah
- 1.9 19 km W of Hiawatha, Utah
- 2.1 13 km NW of Orangeville, Utah
- 1.8 13 km NW of Orangeville, Utah
- 1.6 11 km WNW of Hiawatha, Utah
- 1.5 8 km NNE of Fountain Green, Utah
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
- 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.