Earthquake · reviewed by a seismologist
M 2.4ml
Earthquake near Castle Dale, UT
No earthquake was likely felt in Castle Dale in the 24 hours to 11:49 pm MST (06:49 UTC). The last one was M 3.4, 49 km (30 mi) WSW, at 3:00 pm MDT on 8 July 2024, estimated intensity II (weak) in town; 2 felt reports to USGS. Every earthquake near Castle Dale
This page: a magnitude 2.4 earthquake was recorded 18 km (11 mi) east-southeast of Castle Dale, UT, at 10:22 pm MST on 16 December 2020 (05:22 UTC), 18 km deep. 2 people have reported feeling it to USGS.
USGS: 17 km ESE of Castle Dale, Utah
- When
- 10:22 pm MST on 16 December 2020 ()
- Where
- 18 km (11 mi) east-southeast of Castle Dale, UT · earthquakes near Castle Dale
- Magnitude
- M 2.4 (ml)
- Depth
- 18 km below the surface
- Felt
- 2 reports · strongest reported intensity II
- Nearest
- Emery County, 17 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2083 days ago
Earthquake alerts for Castle Dale, 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 12 km (7 mi) from the epicentre. In Castle Dale, 18 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.
Earthquakes near other towns within 30 km: Orangeville, Huntington, Ferron.
How big was it?
This earthquake released about 130 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 110,000× the energy of this one
- Magna, Utah 2020 M 5.7 80,000× the energy of this one
- Around the size people start to feel M 3.0 7.2× the energy of this one
- This earthquake M 2.4 about 130 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:
- 5.2 13 km ESE of Castle Dale, Utah · 4 km WNW 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 39.1292, -110.8427. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Emery County, UT | 17 km (11 mi) | SE | earthquakes near Emery County |
| Carbon County, UT | 64 km (40 mi) | NNE | earthquakes near Carbon County |
| Sanpete County, UT | 69 km (43 mi) | WNW | earthquakes near Sanpete County |
| Sevier County, UT | 94 km (58 mi) | WSW | earthquakes near Sevier County |
| Wayne County, UT | 98 km (61 mi) | S | earthquakes near Wayne County |
| Grand County, UT | 111 km (69 mi) | E | earthquakes near Grand County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 1.6 24 km WNW of Green River, Utah
- 1.7 18 km ESE of Spring City, Utah
- 1.6 Utah
- 1.7 6 km W of Hiawatha, Utah
- 1.6 10 km SW of Hiawatha, Utah
- 1.8 18 km WSW of Hiawatha, 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.