Earthquake · reviewed by a seismologist
M 2.1ml
Earthquake near Tremonton, UT
No earthquake was likely felt in Tremonton in the 24 hours to 5:32 pm MST (00:32 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 2.1 earthquake was recorded 40 km (25 mi) west-northwest of Tremonton, UT, at 8:56 pm MDT on 27 August 2026 (02:56 UTC), 5.4 km deep.
USGS: 15 km WNW of Howell, Utah
- When
- 8:56 pm MDT on 27 August 2026 ()
- Where
- 40 km (25 mi) west-northwest of Tremonton, UT · earthquakes near Tremonton
- Magnitude
- M 2.1 (ml)
- Depth
- 5.4 km below the surface
- Felt
- no reports yet
- Nearest
- Oneida County, 40 km NNE
- Nearest mapped fault
- North Promontory fault, 6 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 57 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 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 16 km (10 mi) from the epicentre. In Tremonton, 40 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.
How big was it?
This earthquake released about 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
- Magna, Utah 2020 M 5.7 270,000× the energy of this one
- Around the size people start to feel M 3.0 24× the energy of this one
- This earthquake M 2.1 about 40 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
The largest earthquake within 50 km since 2016 was M 4.4 on 2024-05-05 — about 2,700 times the energy of this one.
Before 2016, the USGS record lists 8 earthquakes of M5 or more within 50 km; the five largest:
- 6.6 The 1934 Hansel Valley, Utah Earthquake · 24 km SW of this epicentre
- 6.1 17 km NE of Snowville, Utah · 27 km NNE of this epicentre
- 5.9 35 km SSW of Howell, Utah · 34 km S of this epicentre
- 5.6 Hansel Valley, Utah · 7 km WSW of this epicentre
- 5.5 56 km SW of Howell, Utah · 48 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 41.8295, -112.6252. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Oneida County, ID | 40 km (25 mi) | NNE | earthquakes near Oneida County |
| Box Elder County, UT | 43 km (27 mi) | WSW | earthquakes near Box Elder County |
| Cache County, UT | 74 km (46 mi) | E | earthquakes near Cache County |
| Franklin County, ID | 77 km (48 mi) | ENE | earthquakes near Franklin County |
| Weber County, UT | 88 km (55 mi) | SE | earthquakes near Weber County |
| Davis County, UT | 95 km (59 mi) | SSE | earthquakes near Davis County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
7 earthquakes have been recorded within 50 km since this one.
- 0.9 16 km SW of Thatcher, Utah
- 1.6 49 km SSW of Snowville, Utah
- 0.9 10 km SSW of Portage, Utah
- 1.2 3 km NNE of Thatcher, Utah
- 0.5 8 km E of Howell, Utah
- 0.1 13 km E of Snowville, Utah
- 0.7 10 km SE of Snowville, 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.