Earthquake · reviewed by a seismologist
M 2.9ml
Earthquake near Tremonton, UT
No earthquake was likely felt in Tremonton in the 24 hours to 2:41 pm MST (21:41 UTC). The last one was M 4.7, 140 km (87 mi) SE, at 7:49 am MST on 22 January 2026, estimated intensity II (weak) in town; 4,305 felt reports to USGS. Every earthquake near Tremonton
This page: a magnitude 2.9 earthquake was recorded 15 km (10 mi) west-southwest of Tremonton, UT, at 12:21 am MST on 12 January 2021 (07:21 UTC), 5.1 km deep. 10 people have reported feeling it to USGS.
USGS: 5 km SSW of Thatcher, Utah
42 km (26 mi) WSW of Logan, UT · 102 km (64 mi) NNW of Salt Lake City, UT
- When
- 12:21 am MST on 12 January 2021 ()
- Where
- 15 km (10 mi) west-southwest of Tremonton, UT · earthquakes near Tremonton
- Magnitude
- M 2.9 (ml)
- Depth
- 5.1 km below the surface
- Felt
- 10 reports · strongest reported intensity III
- Measured shaking
- intensity III (ShakeMap)
- Nearest
- Cache County, 49 km ENE
- Nearest mapped fault
- Wasatch fault, 22 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 2062 days ago
Earthquake alerts for Tremonton, UT
Get a notification in this browser when USGS records an earthquake near Tremonton, UT. No account or email needed.
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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 32 km (20 mi) from the epicentre. In Tremonton, 15 km away, the estimate is intensity III (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.
Likely felt in: Tremonton 15 km, intensity III · Brigham City 30 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 720 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 21,000× the energy of this one
- Magna, Utah 2020 M 5.7 15,000× the energy of this one
- Around the size people start to feel M 3.0 1.3× the energy of this one
- This earthquake M 2.9 about 720 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 7 earthquakes of M5 or more within 50 km; the five largest:
- 6.6 The 1934 Hansel Valley, Utah Earthquake · 39 km W of this epicentre
- 6.1 17 km NE of Snowville, Utah · 49 km NNW of this epicentre
- 5.9 35 km SSW of Howell, Utah · 32 km WSW of this epicentre
- 5.6 Hansel Valley, Utah · 35 km WNW of this epicentre
- 5.2 27 km SW of Thatcher, Utah · 22 km SW 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 41.6475, -112.3287. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Cache County, UT | 49 km (31 mi) | ENE | earthquakes near Cache County |
| Weber County, UT | 56 km (35 mi) | SE | earthquakes near Weber County |
| Box Elder County, UT | 61 km (38 mi) | W | earthquakes near Box Elder County |
| Oneida County, ID | 62 km (38 mi) | NNW | earthquakes near Oneida County |
| Davis County, UT | 69 km (43 mi) | S | earthquakes near Davis County |
| Franklin County, ID | 72 km (45 mi) | NE | earthquakes near Franklin County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
57 earthquakes have been recorded within 50 km since this one.
- 1.8 7 km SW of Corinne, Utah
- 1.9 Utah
- 1.7 7 km SW of Corinne, Utah
- 1.6 7 km SW of Corinne, Utah
- 2.7 Utah
- 1.7 Utah
- 1.6 Utah
- 1.8 13 km NNE of Howell, Utah
- 2.1 12 km NNE of Howell, Utah
- 1.6 Utah
- 1.9 5 km W of Garland, Utah
- 2.1 2 km SSW of Howell, Utah
- 1.7 9 km E of Snowville, Utah
- 2.1 7 km WSW of Corinne, Utah
- 2.0 4 km NE of Trenton, 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.