Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near Enterprise, UT
No earthquake was likely felt in Enterprise in the 24 hours to 7:40 pm MST (02:40 UTC). The last one was M 1.9, 14 km (9 mi) SSW, at 1:11 am MDT on 29 March 2026, estimated intensity II (weak) in town. Every earthquake near Enterprise
This page: a magnitude 1.8 earthquake was recorded 20 km (12 mi) west-southwest of Enterprise, UT, at 11:28 pm MDT on 21 July 2018 (05:28 UTC), 2.6 km deep.
USGS: 20 km WSW of Enterprise, Utah
57 km (35 mi) NNW of St. George, UT
- When
- 11:28 pm MDT on 21 July 2018 ()
- Where
- 20 km (12 mi) west-southwest of Enterprise, UT · earthquakes near Enterprise
- Magnitude
- M 1.8 (ml)
- Depth
- 2.6 km below the surface
- Felt
- no reports yet
- Nearest
- Washington County, 47 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3035 days ago
Earthquake alerts for Enterprise, 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 Enterprise, 20 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 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 1,200,000× the energy of this one
- Magna, Utah 2020 M 5.7 840,000× the energy of this one
- Around the size people start to feel M 3.0 75× 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
The largest earthquake within 50 km since 2016 was M 4.2 on 2016-01-15 — about 5,400 times the energy of this one.
Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:
- 6.3 Near Pine Valley, Utah · 39 km ESE of this epicentre
- 5.9 38 km ESE of Caliente, Nevada · 21 km WSW of this epicentre
- 5.3 36 km SE of Caliente, Nevada · 27 km WSW of this epicentre
- 5.2 36 km SE of Caliente, Nevada · 27 km WSW 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 37.5013, -113.9282. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Washington County, UT | 47 km (29 mi) | SE | earthquakes near Washington County |
| Iron County, UT | 71 km (44 mi) | NE | earthquakes near Iron County |
| Lincoln County, NV | 84 km (52 mi) | W | earthquakes near Lincoln County |
| Beaver County, UT | 113 km (70 mi) | NNE | earthquakes near Beaver County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 1.6 6 km ESE of Panaca, Nevada
- 1.6 7 km E of Panaca, Nevada
- 1.7 7 km E of Panaca, Nevada
- 2.3 6 km E of Panaca, Nevada
- 2.4 7 km E of Panaca, Nevada
- 2.3 6 km E of Panaca, Nevada
- 2.0 7 km E of Panaca, Nevada
- 1.5 6 km E of Panaca, Nevada
- 1.6 6 km ESE of Panaca, Nevada
- 1.6 6 km E of Panaca, Nevada
- 2.1 6 km E of Panaca, Nevada
- 1.6 6 km ESE of Panaca, Nevada
- 4.2 6 km E of Panaca, Nevada
- 1.7 19 km N of Beryl Junction, Utah
- 2.4 4 km SW of Beryl Junction, 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.