Light mag. 2.8 earthquake - 96 mi southwest of Salt Lake City, Salt Lake County, Utah, USA, on Sunday, Dec 19, 2021 at 9:43 pm (GMT -7) -
Light magnitude 2.8 earthquake at 5 km depth
20 Dec 05:28 UTC: First to report: USGS after 45 minutes.
20 Dec 14:02: Magnitude recalculated from 3.0 to 2.8. Hypocenter depth recalculated from 5.0 to 4.6 km (from 3.1 to 2.9 mi). Epicenter location corrected by 2.5 km (1.6 mi) towards ESE.
20 Dec 14:16: Epicenter location corrected by 0.7 km (0.4 mi) towards WNW.
20 Dec 14:02: Magnitude recalculated from 3.0 to 2.8. Hypocenter depth recalculated from 5.0 to 4.6 km (from 3.1 to 2.9 mi). Epicenter location corrected by 2.5 km (1.6 mi) towards ESE.
20 Dec 14:16: Epicenter location corrected by 0.7 km (0.4 mi) towards WNW.
Earthquake details
| Date & time | Dec 20, 2021 04:43:27 UTC - |
| Local time at epicenter | Sunday, Dec 19, 2021 at 9:43 pm (GMT -7) |
| Status | Confirmed |
| Magnitude | 2.8 |
| Depth | 4.6 km |
| Epicenter latitude / longitude | 39.90733°N / 113.337°W  (Juab, Utah, United States) |
| Antipode | 39.907°S / 66.663°E |
| Shaking intensity | Weak shaking near epicenter |
| Felt | 0 reports |
| Primary data source | USGS (United States Geological Survey) |
| Nearest volcano | Black Rock Desert (127 km / 79 mi) |
| Nearby towns and cities | 80 km (50 mi) WSW of Vernon (pop: 275) | Show on map | Quakes nearby 112 km (70 mi) SW of Tooele (pop: 33,200) | Show on map | Quakes nearby 137 km (85 mi) WSW of Lehi (pop: 58,500) | Show on map | Quakes nearby 140 km (87 mi) WSW of South Jordan (pop: 66,600) | Show on map | Quakes nearby 142 km (88 mi) WSW of West Jordan (pop: 111,900) | Show on map | Quakes nearby 143 km (89 mi) SW of West Valley City (pop: 136,200) | Show on map | Quakes nearby 145 km (90 mi) WSW of Sandy (pop: 87,500) | Show on map | Quakes nearby 146 km (91 mi) WSW of Orem (pop: 94,500) | Show on map | Quakes nearby 147 km (92 mi) WSW of Provo (pop: 115,300) | Show on map | Quakes nearby 155 km (96 mi) SW of Salt Lake City (pop: 192,700) | Show on map | Quakes nearby |
| Weather at epicenter at time of quake | Broken Clouds  -5°C (23 F), humidity: 81%, wind: 1 m/s (2 kts) from SSE |
| Estimated seismic energy released | 1 x 109 joules (278 kilowatt hours, equivalent to 0.239 tons of TNT) | about seismic energy |
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
| Mag. | Depth | Location | Source |
| 2.8 | 4.6 km | 61 Km SW of Dugway, Utah | USGS |
| 3.0 | 5 km | UTAH | EMSC |
| 2.8 | 4.6 km | Utah | RaspberryShake |
User reports for this quake
At magnitude 2.8, this quake might have been felt very close to the epicenter and under calm conditions.User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Earlier earthquakes in the same area
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