10 km SW of Milford, UT

Yes. A magnitude 1.9 earthquake was recorded 10 km SW of Milford, UT, at 1:05 am MDT on 23 March 2021 (07:05 UTC), less than 1 km deep.

2021-03-23 07:05 UTC · 0.2 km deep · released about 21 lb of TNT

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: 2021-03-23 07:05 UTC
Magnitude: M 1.9 (ml)
Depth: 0.2 km below the surface
Felt: no reports yet
Nearest: Beaver County, 15 km WNW
Nearest mapped fault: Mineral Mountains (west side) faults, 7 km from its surface trace — near is not the same as on
Status: Reviewed by a seismologist

USGS · last changed by USGS 2061 days ago · we first saw it 2061 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 15 km (9 mi) from the epicentre. 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: Milford 10 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
Magna, Utah 2020 M 5.7 500,000× the energy of this one
Around the size people start to feel M 3.0 45× the energy of this one
This earthquake M 1.9 about 21 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.

Where

Map loads when it scrolls into view

Epicentre 38.3243, -113.0745. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction from the epicentre
Beaver County, UT	15 km (9 mi)	WNW	earthquakes near Beaver County
Iron County, UT	50 km (31 mi)	SSW	earthquakes near Iron County
Millard County, UT	71 km (44 mi)	N	earthquakes near Millard County
Piute County, UT	82 km (51 mi)	E	earthquakes near Piute County
Sevier County, UT	119 km (74 mi)	ENE	earthquakes near Sevier County
Washington County, UT	124 km (77 mi)	SSW	earthquakes near Washington County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

60 earthquakes have been recorded within 50 km since this one.

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 06:15 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.