Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near Mona, UT
No earthquake was likely felt in Mona in the 24 hours to 3:10 pm MST (22:10 UTC). The last one was M 2.4, 18 km (11 mi) ENE, at 5:34 pm MDT on 28 April 2026, estimated intensity II (weak) in town. Every earthquake near Mona
This page: a magnitude 1.8 earthquake was recorded 11 km (7 mi) west-southwest of Mona, UT, at 3:11 pm MDT on 14 March 2023 (21:11 UTC), less than 1 km deep.
USGS: 11 km WSW of Mona, Utah
58 km (36 mi) SSW of Provo, UT · 110 km (68 mi) S of Salt Lake City, UT
- When
- 3:11 pm MDT on 14 March 2023 ()
- Where
- 11 km (7 mi) west-southwest of Mona, UT · earthquakes near Mona
- Magnitude
- M 1.8 (ml)
- Depth
- -0.2 km below the surface
- Felt
- no reports yet
- Nearest
- Utah County, 46 km NE
- Nearest mapped fault
- Wasatch fault, 14 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 1339 days ago
Earthquake alerts for Mona, 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 13 km (8 mi) from the epicentre. In Mona, 11 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: Nephi, Genola, Santaquin.
How big was it?
This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 810,000× the energy of this one
- Around the size people start to feel M 3.0 72× the energy of this one
- This earthquake M 1.8 about 13 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 2 earthquakes of M5 or more within 50 km:
- 5.0 3 km WSW of Nephi, Utah · 14 km SE of this epicentre
- 5.0 1 km SSW of Mount Nebo, Utah · 17 km N 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 39.7875, -111.9827. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Utah County, UT | 46 km (28 mi) | NE | earthquakes near Utah County |
| Sanpete County, UT | 58 km (36 mi) | SE | earthquakes near Sanpete County |
| Juab County, UT | 70 km (43 mi) | W | earthquakes near Juab County |
| Wasatch County, UT | 93 km (58 mi) | NE | earthquakes near Wasatch County |
| Salt Lake County, UT | 98 km (61 mi) | N | earthquakes near Salt Lake County |
| Sevier County, UT | 117 km (72 mi) | S | earthquakes near Sevier County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
53 earthquakes have been recorded within 50 km since this one.
- 1.3 17 km WSW of Levan, Utah
- 1.9 17 km WSW of Levan, Utah
- 1.1 17 km WSW of Levan, Utah
- 1.2 16 km SSW of Levan, Utah
- 0.9 15 km NNW of Fayette, Utah
- 0.9 12 km SSW of Levan, Utah
- 1.3 17 km SSE of Levan, Utah
- 1.2 17 km NNE of Fayette, Utah
- 1.9 18 km S of Levan, Utah
- 1.9 16 km S of Levan, Utah
- 1.9 17 km ESE of Rocky Ridge, Utah
- 2.4 17 km ESE of Rocky Ridge, Utah
- 2.5 8 km SSE of Woodland Hills, Utah
- 1.6 21 km NE of Leamington, Utah
- 1.8 21 km WNW of Levan, 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.