Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Richfield, UT
No earthquake was likely felt in Richfield in the 24 hours to 4:42 pm MST (23:42 UTC). The last one was M 3.2, 34 km (21 mi) W, at 8:35 am MDT on 22 April 2026, estimated intensity II (weak) in town; 6 felt reports to USGS. Every earthquake near Richfield
This page: a magnitude 1.7 earthquake was recorded 13 km (8 mi) north-northeast of Richfield, UT, at 5:11 am MDT on 14 October 2020 (11:11 UTC), 11 km deep.
USGS: 5 km NW of Sigurd, Utah
- When
- 5:11 am MDT on 14 October 2020 ()
- Where
- 13 km (8 mi) north-northeast of Richfield, UT · earthquakes near Richfield
- Magnitude
- M 1.7 (ml)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Sevier County, 23 km SE
- Nearest mapped fault
- Maple Grove faults, 15 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 2220 days ago
Earthquake alerts for Richfield, UT
Get a notification in this browser when USGS records an earthquake near Richfield, 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 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 6 km (4 mi) from the epicentre. In Richfield, 13 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: Aurora, Salina, Fillmore, Monroe.
How big was it?
This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 92× the energy of this one
- This earthquake M 1.7 about 10 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 4.0 on 2019-02-20 — about 3,300 times the energy of this one.
Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:
- 5.2 0 km SSW of Central Valley, Utah · 21 km SSW of this epicentre
- 5.2 25 km SE of Salina, Utah · 35 km E of this epicentre
- 5.0 10 km NE of Marysvale, Utah · 41 km SSW 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 38.8743, -112.0195. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Sevier County, UT | 23 km (14 mi) | SE | earthquakes near Sevier County |
| Piute County, UT | 61 km (38 mi) | S | earthquakes near Piute County |
| Sanpete County, UT | 67 km (42 mi) | NE | earthquakes near Sanpete County |
| Millard County, UT | 97 km (60 mi) | W | earthquakes near Millard County |
| Wayne County, UT | 113 km (70 mi) | SE | earthquakes near Wayne County |
| Emery County, UT | 113 km (70 mi) | E | earthquakes near Emery County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
39 earthquakes have been recorded within 50 km since this one.
- 1.6 12 km SW of Fayette, Utah
- 1.6 7 km N of Redmond, Utah
- 2.2 6 km S of Joseph, Utah
- 1.6 15 km ESE of Fillmore, Utah
- 1.7 5 km NNW of Richfield, Utah
- 1.5 8 km NW of Fayette, Utah
- 1.5 5 km ENE of Mayfield, Utah
- 2.6 12 km N of Koosharem, Utah
- 2.0 26 km SW of Emery, Utah
- 2.2 27 km SW of Emery, Utah
- 2.2 4 km N of Richfield, Utah
- 2.4 16 km NNE of Koosharem, Utah
- 1.5 9 km SE of Scipio, Utah
- 1.6 7 km N of Marysvale, Utah
- 1.8 5 km NW of Central Valley, 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.