Earthquake · reviewed by a seismologist
M 3.8ml
Earthquake near Fillmore, UT
No earthquake was likely felt in Fillmore in the 24 hours to 2:40 am MST (09:40 UTC). The last one was M 3.5, 55 km (34 mi) W, at 1:02 am MDT on 27 September 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Fillmore
This page: a magnitude 3.8 earthquake was recorded 42 km (26 mi) west-southwest of Fillmore, UT, at 11:34 pm MDT on 11 September 2018 (05:34 UTC), less than 1 km deep. 2 people have reported feeling it to USGS.
USGS: 26 km W of Kanosh, Utah
- When
- 11:34 pm MDT on 11 September 2018 ()
- Where
- 42 km (26 mi) west-southwest of Fillmore, UT · earthquakes near Fillmore
- Magnitude
- M 3.8 (ml)
- Depth
- -0.0 km below the surface
- Felt
- 2 reports · strongest reported intensity III
- Measured shaking
- intensity V (ShakeMap)
- Nearest
- Millard County, 41 km WNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2017 days ago
Earthquake alerts for Fillmore, UT
Get a notification in this browser when USGS records an earthquake near Fillmore, 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 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 84 km (52 mi) from the epicentre. In Fillmore, 42 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: Fillmore 42 km, intensity II · Milford 47 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 8.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 21,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 930× the energy of this one
- Magna, Utah 2020 M 5.7 660× the energy of this one
- This earthquake M 3.8 about 8.1 tons of TNT
- Around the size people start to feel M 3.0 this one released 17× more
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 one earthquake of M5 or more within 50 km:
- 6.6 Near Marysvale, Utah · 41 km SE 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 38.7653, -112.7343. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Millard County, UT | 41 km (25 mi) | WNW | earthquakes near Millard County |
| Beaver County, UT | 63 km (39 mi) | SW | earthquakes near Beaver County |
| Piute County, UT | 71 km (44 mi) | SE | earthquakes near Piute County |
| Sevier County, UT | 80 km (50 mi) | E | earthquakes near Sevier County |
| Juab County, UT | 106 km (66 mi) | N | earthquakes near Juab County |
| Iron County, UT | 107 km (67 mi) | SSW | earthquakes near Iron County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
57 earthquakes have been recorded within 50 km since this one.
- 4.1 28 km W of Kanosh, Utah
- 2.1 29 km W of Kanosh, Utah
- 1.9 28 km W of Kanosh, Utah
- 2.0 28 km W of Kanosh, Utah
- 2.4 8 km SSW of Kanosh, Utah
- 1.9 11 km SSW of Kanosh, Utah
- 2.2 9 km SSW of Kanosh, Utah
- 1.8 10 km SSW of Kanosh, Utah
- 2.4 20 km SW of Kanosh, Utah
- 1.7 8 km SW of Kanosh, Utah
- 1.6 8 km SW of Kanosh, Utah
- 1.8 9 km SW of Kanosh, Utah
- 1.6 8 km SW of Kanosh, Utah
- 1.7 9 km SW of Kanosh, Utah
- 1.6 9 km SW of Kanosh, 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.