Earthquake near Richfield, UT

No earthquake was likely felt in Richfield in the 24 hours to 12:55 am MST (07:55 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 2.3 earthquake was recorded 29 km (18 mi) southwest of Richfield, UT, at 10:51 am MST on 31 January 2018 (17:51 UTC), less than 1 km deep.

USGS: Utah

10:51 am MST, Jan 31, 2018 · 2018-01-31 17:51 UTC · -1.8 km deep · released about 91 lb of TNT

Every earthquake near Richfield Felt it? Tell USGS Check my area

Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.

When: 10:51 am MST on 31 January 2018 (2018-01-31 17:51 UTC)
Where: 29 km (18 mi) southwest of Richfield, UT · earthquakes near Richfield
Magnitude: M 2.3 (ml)
Depth: -1.8 km below the surface
Felt: no reports yet
Nearest: Piute County, 29 km SSE
Nearest mapped fault: Annabella graben faults, 22 km from its surface trace — near is not the same as on
Status: Reviewed by a seismologist

USGS · last changed by USGS 3208 days ago · we first saw it 3208 days ago

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 20 km (12 mi) from the epicentre. In Richfield, 29 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.

Likely felt in: Monroe 16 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 91 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
Magna, Utah 2020 M 5.7 120,000× the energy of this one
Around the size people start to feel M 3.0 10× the energy of this one
This earthquake M 2.3 about 91 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 3 earthquakes of M5 or more within 50 km:

6.6 Near Marysvale, Utah · 12 km SW of this epicentre Nov 14, 1901
5.2 0 km SSW of Central Valley, Utah · 22 km NE of this epicentre Sep 29, 1921
5.0 10 km NE of Marysvale, Utah · 14 km ESE of this epicentre Oct 4, 1967

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

Map loads when it scrolls into view

Nearby places

Place	Distance	Direction from the epicentre
Piute County, UT	29 km (18 mi)	SSE	earthquakes near Piute County
Sevier County, UT	46 km (28 mi)	ENE	earthquakes near Sevier County
Millard County, UT	86 km (53 mi)	WNW	earthquakes near Millard County
Beaver County, UT	86 km (54 mi)	WSW	earthquakes near Beaver County
Sanpete County, UT	109 km (68 mi)	NE	earthquakes near Sanpete County
Garfield County, UT	109 km (68 mi)	SE	earthquakes near Garfield 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.

1.7 8 km SSW of Joseph, Utah 10:09 UTC
1.8 Utah 08:53 UTC
2.0 Utah 05:51 UTC
2.1 9 km WSW of Kanosh, Utah 07:45 UTC
1.9 30 km N of Beaver, Utah 04:51 UTC
1.6 1 km NNE of Marysvale, Utah 17:06 UTC
2.1 29 km W of Kanosh, Utah 00:03 UTC
1.8 27 km W of Kanosh, Utah 15:08 UTC
1.9 27 km SSW of Kanosh, Utah 05:30 UTC
1.9 29 km W of Kanosh, Utah 07:45 UTC
1.8 26 km W of Kanosh, Utah 22:57 UTC
2.1 27 km W of Kanosh, Utah 07:13 UTC
1.8 26 km W of Kanosh, Utah 06:29 UTC
2.0 30 km W of Kanosh, Utah 06:02 UTC
1.9 26 km WSW of Kanosh, Utah 06:00 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 07:55 UTC. 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.