Earthquake · reviewed by a seismologist
M 3.0ml
Earthquake near Ephraim, UT
No earthquake was likely felt in Ephraim in the 24 hours to 11:50 pm MST (06:50 UTC). The last one was M 1.9, 10 km (7 mi) S, at 2:29 am MDT on 22 June 2026, estimated intensity II (weak) in town. Every earthquake near Ephraim
This page: a magnitude 3.0 earthquake was recorded 45 km (28 mi) west of Ephraim, UT, at 11:01 pm MST on 11 February 2023 (06:01 UTC), 2.5 km deep. 2 people have reported feeling it to USGS.
USGS: Utah
- When
- 11:01 pm MST on 11 February 2023 ()
- Where
- 45 km (28 mi) west of Ephraim, UT · earthquakes near Ephraim
- Magnitude
- M 3.0 (ml)
- Depth
- 2.5 km below the surface
- Felt
- 2 reports · strongest reported intensity II
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- Sanpete County, 45 km E
- Nearest mapped fault
- Little Valley faults, 1 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 1299 days ago
Earthquake alerts for Ephraim, UT
Get a notification in this browser when USGS records an earthquake near Ephraim, 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 35 km (22 mi) from the epicentre. In Ephraim, 45 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 830 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 410,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
- Magna, Utah 2020 M 5.7 13,000× the energy of this one
- This earthquake M 3.0 about 830 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:
- 5.0 3 km WSW of Nephi, Utah · 39 km NNE 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 39.3948, -112.1028. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Sanpete County, UT | 45 km (28 mi) | E | earthquakes near Sanpete County |
| Juab County, UT | 69 km (43 mi) | WNW | earthquakes near Juab County |
| Sevier County, UT | 76 km (47 mi) | SSE | earthquakes near Sevier County |
| Utah County, UT | 89 km (55 mi) | NNE | earthquakes near Utah County |
| Millard County, UT | 101 km (63 mi) | WSW | earthquakes near Millard County |
| Piute County, UT | 118 km (73 mi) | S | earthquakes near Piute County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 2.3 10 km SW of Nephi, Utah
- 1.6 10 km SW of Nephi, Utah
- 1.6 10 km WNW of Fayette, Utah
- 1.6 19 km NE of Scipio, Utah
- 1.6 10 km NNW of Aurora, Utah
- 1.9 11 km NW of Aurora, Utah
- 2.1 17 km E of Leamington, Utah
- 1.5 13 km W of Levan, Utah
- 1.9 18 km NNW of Fayette, Utah
- 1.9 5 km ENE of Sterling, Utah
- 1.5 17 km N of Fayette, Utah
- 1.6 19 km SW of Levan, Utah
- 3.0 9 km NNE of Scipio, Utah
- 1.5 9 km NNE of Scipio, Utah
- 1.8 17 km ESE of Holden, 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.