QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

Earthquake near Monroe, UT

No earthquake was likely felt in Monroe in the 24 hours to 11:51 pm MST (06:51 UTC). The last one was M 3.3, 41 km (25 mi) SSW, at 10:44 pm MDT on 30 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Monroe

This page: a magnitude 2.6 earthquake was recorded 13 km (8 mi) south of Monroe, UT, at 6:15 am MDT on 21 September 2026 (12:15 UTC), 2.6 km deep.

USGS: 10 km NE of Marysvale, Utah

6:15 am MDT, Sep 21, 2026 · · 2.6 km deep · released about 270 lb of TNT

10 km30 km60 km120 km N Piute County 20 kmSevier County 38 kmGarfield County 97 kmBeaver County 97 kmMillard County 99 kmWayne County 104 kmSanpete County 107 km
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
6:15 am MDT on 21 September 2026 ()
Where
13 km (8 mi) south of Monroe, UT · earthquakes near Monroe
Magnitude
M 2.6 (ml)
Depth
2.6 km below the surface
Felt
no reports yet
Nearest
Piute County, 20 km S
Nearest mapped fault
Annabella graben faults, 17 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 50 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 24 km (15 mi) from the epicentre. In Monroe, 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.

Likely felt in: Monroe 13 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 270 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 57,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 40,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.6× the energy of this one
  4. This earthquake M 2.6 about 270 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 130 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 6.6 Near Marysvale, Utah · 23 km W of this epicentre
  2. 5.2 0 km SSW of Central Valley, Utah · 21 km N of this epicentre
  3. 5.0 10 km NE of Marysvale, Utah · 0 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 38.5173, -112.1398. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Piute County, UT 20 km (13 mi) S earthquakes near Piute County
Sevier County, UT 38 km (24 mi) NE earthquakes near Sevier County
Garfield County, UT 97 km (60 mi) SE earthquakes near Garfield County
Beaver County, UT 97 km (60 mi) W earthquakes near Beaver County
Millard County, UT 99 km (62 mi) WNW earthquakes near Millard County
Wayne County, UT 104 km (65 mi) ESE earthquakes near Wayne County

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

Aftershocks so far

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

  1. 1.9 8 km NW of Junction, Utah
  2. 1.9 7 km NW of Junction, Utah
  3. 0.7 8 km NW of Junction, Utah
  4. 2.4 10 km NW of Junction, Utah
  5. 1.0 9 km WNW of Junction, Utah
  6. 1.6 30 km SW of Kanosh, Utah
  7. 1.6 7 km NW of Junction, Utah
  8. 1.7 7 km NW of Junction, Utah
  9. 1.8 7 km NW of Junction, Utah
  10. 0.6 7 km NW of Junction, Utah
  11. 2.5 9 km NW of Junction, Utah
  12. 2.0 8 km NW of Junction, Utah
  13. 2.0 8 km NW of Junction, Utah
  14. 3.0 8 km NW of Junction, Utah
  15. 3.3 8 km NW of Junction, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.