Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Richfield, UT
No earthquake was likely felt in Richfield in the 24 hours to 7:27 pm MST (02:27 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 1.6 earthquake was recorded 10 km (6 mi) north of Richfield, UT, at 6:46 pm MDT on 6 August 2019 (00:46 UTC), 8.1 km deep.
USGS: 8 km WNW of Sigurd, Utah
- When
- 6:46 pm MDT on 6 August 2019 ()
- Where
- 10 km (6 mi) north of Richfield, UT · earthquakes near Richfield
- Magnitude
- M 1.6 (ml)
- Depth
- 8.1 km below the surface
- Felt
- no reports yet
- Nearest
- Sevier County, 25 km ESE
- Nearest mapped fault
- Maple Grove faults, 16 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 2655 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 7 km (4 mi) from the epicentre. In Richfield, 10 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 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
- Around the size people start to feel M 3.0 150× the energy of this one
- This earthquake M 1.6 about 6.4 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 5,400 times the energy of this one.
Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:
- 6.6 Near Marysvale, Utah · 50 km SW of this epicentre
- 5.2 0 km SSW of Central Valley, Utah · 18 km S of this epicentre
- 5.2 25 km SE of Salina, Utah · 39 km E of this epicentre
- 5.0 10 km NE of Marysvale, Utah · 39 km S 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 38.8608, -112.0642. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Sevier County, UT | 25 km (16 mi) | ESE | earthquakes near Sevier County |
| Piute County, UT | 59 km (36 mi) | S | earthquakes near Piute County |
| Sanpete County, UT | 71 km (44 mi) | NE | earthquakes near Sanpete County |
| Millard County, UT | 93 km (58 mi) | W | earthquakes near Millard County |
| Juab County, UT | 114 km (71 mi) | NNW | earthquakes near Juab County |
| Wayne County, UT | 115 km (71 mi) | SE | earthquakes near Wayne County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
46 earthquakes have been recorded within 50 km since this one.
- 2.8 4 km SSE of Joseph, Utah
- 1.6 10 km ESE of Glenwood, Utah
- 1.7 28 km N of Fremont, Utah
- 2.8 4 km NW of Aurora, Utah
- 2.5 8 km N of Richfield, Utah
- 1.6 2 km SW of Elsinore, Utah
- 1.7 18 km E of Holden, Utah
- 2.4 8 km SW of Kanosh, Utah
- 3.0 3 km NNW of Central Valley, Utah
- 1.6 8 km WNW of Marysvale, Utah
- 2.6 13 km SW of Kanosh, Utah
- 1.9 13 km SW of Kanosh, Utah
- 1.8 26 km ESE of Salina, Utah
- 1.6 31 km N of Fremont, Utah
- 1.9 28 km N of Fremont, 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.