Earthquake · reviewed by a seismologist
M 1.9ml
Earthquake near Mapleton, UT
No earthquake was likely felt in Mapleton in the 24 hours to 11:27 am MST (18:27 UTC). The last one was M 2.5, 20 km (13 mi) S, at 9:28 pm MDT on 26 April 2026, estimated intensity II (weak) in town; 11 felt reports to USGS. Every earthquake near Mapleton
This page: a magnitude 1.9 earthquake was recorded 20 km (12 mi) east-southeast of Mapleton, UT, at 12:50 pm MDT on 14 September 2020 (18:50 UTC), 7.8 km deep.
USGS: 20 km ESE of Mapleton, Utah
33 km (20 mi) SE of Provo, UT
- When
- 12:50 pm MDT on 14 September 2020 ()
- Where
- 20 km (12 mi) east-southeast of Mapleton, UT · earthquakes near Mapleton
- Magnitude
- M 1.9 (ml)
- Depth
- 7.8 km below the surface
- Felt
- no reports yet
- Nearest
- Utah County, 26 km WNW
- Nearest mapped fault
- Wasatch fault, 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 2251 days ago
Earthquake alerts for Mapleton, UT
Get a notification in this browser when USGS records an earthquake near Mapleton, 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 13 km (8 mi) from the epicentre. In Mapleton, 20 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: Woodland Hills, Springville, Spanish Fork, Salem, Elk Ridge.
How big was it?
This earthquake released about 23 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 5.8 660,000× the energy of this one
- Magna, Utah 2020 M 5.7 470,000× the energy of this one
- Around the size people start to feel M 3.0 42× the energy of this one
- This earthquake M 1.9 about 23 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 since 1900 lists no earthquake of M5 or more within 50 km.
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 40.0338, -111.3793. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Utah County, UT | 26 km (16 mi) | WNW | earthquakes near Utah County |
| Wasatch County, UT | 38 km (24 mi) | NNE | earthquakes near Wasatch County |
| Sanpete County, UT | 75 km (47 mi) | SSW | earthquakes near Sanpete County |
| Carbon County, UT | 79 km (49 mi) | ESE | earthquakes near Carbon County |
| Salt Lake County, UT | 84 km (52 mi) | NNW | earthquakes near Salt Lake County |
| Duchesne County, UT | 86 km (53 mi) | ENE | earthquakes near Duchesne County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
43 earthquakes have been recorded within 50 km since this one.
- 1.6 3 km NNE of Clear Creek, Utah
- 1.7 5 km W of Wallsburg, Utah
- 1.5 8 km NNE of Fountain Green, Utah
- 2.6 6 km SW of Rocky Ridge, Utah
- 2.7 15 km E of Independence, Utah
- 2.7 Utah
- 1.5 28 km ESE of Mapleton, Utah
- 2.4 28 km ESE of Mapleton, Utah
- 1.7 28 km ESE of Mapleton, Utah
- 1.9 8 km NE of Lindon, Utah
- 1.6 11 km W of Clear Creek, Utah
- 1.6 20 km E of Mapleton, Utah
- 1.9 19 km E of Mapleton, Utah
- 2.2 24 km ESE of Woodland Hills, Utah
- 2.1 9 km ENE of Fairview, 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.