Earthquake · reviewed by a seismologist
M 2.9ml
Earthquake near Cedar City, UT
No earthquake was likely felt in Cedar City in the 24 hours to 5:00 am MST (12:00 UTC). The last one was M 2.2, 16 km (10 mi) N, at 10:46 am MST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Cedar City
This page: a magnitude 2.9 earthquake was recorded 24 km (15 mi) north of Cedar City, UT, at 1:55 am MDT on 8 August 2020 (07:55 UTC), 12 km deep. 1 person has reported feeling it to USGS.
USGS: 12 km NW of Summit, Utah
- When
- 1:55 am MDT on 8 August 2020 ()
- Where
- 24 km (15 mi) north of Cedar City, UT · earthquakes near Cedar City
- Magnitude
- M 2.9 (ml)
- Depth
- 12 km below the surface
- Felt
- 1 report · strongest reported intensity I
- Nearest
- Iron County, 26 km W
- Nearest mapped fault
- Enoch graben faults, under 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 2213 days ago
Earthquake alerts for Cedar City, UT
Get a notification in this browser when USGS records an earthquake near Cedar City, 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 28 km (17 mi) from the epicentre. In Cedar City, 24 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.
Likely felt in: Enoch 13 km, intensity II · Cedar City 24 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 590 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 26,000× the energy of this one
- Magna, Utah 2020 M 5.7 18,000× the energy of this one
- Around the size people start to feel M 3.0 1.6× the energy of this one
- This earthquake M 2.9 about 590 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 since 1900 lists no earthquake of M5 or more within 50 km.
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 37.8910, -113.0128. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Iron County, UT | 26 km (16 mi) | W | earthquakes near Iron County |
| Beaver County, UT | 56 km (34 mi) | NNW | earthquakes near Beaver County |
| Washington County, UT | 81 km (51 mi) | SSW | earthquakes near Washington County |
| Piute County, UT | 92 km (57 mi) | ENE | earthquakes near Piute County |
| Millard County, UT | 119 km (74 mi) | N | earthquakes near Millard County |
| Kane County, UT | 126 km (78 mi) | ESE | earthquakes near Kane County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 2.5 10 km SW of Milford, Utah
- 2.0 9 km SW of Milford, Utah
- 2.0 9 km SW of Milford, Utah
- 2.3 10 km SW of Milford, Utah
- 1.6 8 km SSW of Milford, Utah
- 1.8 9 km SW of Milford, Utah
- 1.9 10 km SW of Milford, UT
- 2.0 10 km SSW of Milford, Utah
- 2.0 9 km SW of Milford, Utah
- 1.6 10 km SW of Milford, Utah
- 2.2 8 km SW of Milford, Utah
- 2.1 9 km SW of Milford, Utah
- 1.7 10 km SSW of Milford, Utah
- 1.5 9 km SSW of Milford, Utah
- 1.5 9 km SSW of Milford, 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.