Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Spanish Fork, UT
USGS: 9 km SSE of Eureka, Utah
50 km (31 mi) S of Eagle Mountain, UT · 102 km (63 mi) S of Salt Lake City, UT
- When
- 12:05 pm MDT on 16 October 2018 ()
- Where
- 46 km (29 mi) SW of Spanish Fork, UT · earthquakes near Spanish Fork
- Magnitude
- M 1.6 (md)
- Depth
- 6.0 km below the surface
- Felt
- no reports yet
- Nearest
- Utah County, 45 km NE
- Nearest mapped fault
- Wasatch fault, 25 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 2908 days ago
A magnitude 1.6 earthquake was recorded 46 km (29 mi) SW of Spanish Fork, UT, at 12:05 pm MDT on 16 October 2018 (18:05 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Mona, Genola, Nephi, Santaquin.
How big was it?
This earthquake released about 8.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
- Around the size people start to feel M 3.0 120× the energy of this one
- This earthquake M 1.6 about 8.1 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 2 earthquakes of M5 or more within 50 km:
- 5.0 3 km WSW of Nephi, Utah · 27 km SE of this epicentre
- 5.0 1 km SSW of Mount Nebo, Utah · 13 km NE 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 39.8715, -112.0912. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Utah County, UT | 45 km (28 mi) | NE | earthquakes near Utah County |
| Juab County, UT | 62 km (39 mi) | WSW | earthquakes near Juab County |
| Sanpete County, UT | 71 km (44 mi) | SE | earthquakes near Sanpete County |
| Salt Lake County, UT | 90 km (56 mi) | N | earthquakes near Salt Lake County |
| Wasatch County, UT | 94 km (59 mi) | ENE | earthquakes near Wasatch County |
| Tooele County, UT | 110 km (68 mi) | NW | earthquakes near Tooele County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
50 earthquakes have been recorded within 50 km since this one.
- 1.8 14 km WSW of Levan, Utah
- 1.9 13 km WSW of Levan, Utah
- 1.9 12 km WSW of Levan, Utah
- 2.1 15 km NE of Leamington, Utah
- 2.2 9 km WSW of Mona, Utah
- 2.1 9 km WSW of Levan, Utah
- 1.6 17 km WNW of Levan, Utah
- 1.7 6 km SSW of Rocky Ridge, Utah
- 1.6 12 km WSW of Levan, Utah
- 1.7 8 km SW of Levan, Utah
- 1.7 15 km SW of Levan, Utah
- 3.2 16 km SSW of Levan, Utah
- 1.6 13 km W of Mona, Utah
- 1.5 9 km W of Levan, Utah
- 2.1 5 km NNE of Fountain Green, 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.