Earthquake · reviewed by a seismologist
M 3.7ml
Earthquake near Bluffdale, UT
USGS: 3 km SSW of Bluffdale, Utah
16 km (10 mi) SSE of West Jordan, UT · 7 km (4 mi) ESE of Herriman, UT
- When
- 5:09 am MST on 15 February 2019 ()
- Where
- 3 km (2 mi) SSW of Bluffdale, UT · earthquakes near Bluffdale
- Magnitude
- M 3.7 (ml)
- Depth
- 8.6 km below the surface
- Felt
- 8,867 reports · strongest reported intensity V
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- Salt Lake County, 23 km N
- Nearest mapped fault
- Wasatch fault, 10 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 1976 days ago
A magnitude 3.7 earthquake was recorded 3 km (2 mi) SSW of Bluffdale, UT, at 5:09 am MST on 15 February 2019 (12:09 UTC). 8,867 people have reported feeling it to USGS. This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
Earthquakes near other towns within 30 km: Riverton, Herriman, Draper, South Jordan, Lehi, Saratoga Springs.
How big was it?
This earthquake released about 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 32,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
- Magna, Utah 2020 M 5.7 1,000× the energy of this one
- This earthquake M 3.7 about 5.4 tons of TNT
- Around the size people start to feel M 3.0 this one released 11× 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 2 earthquakes of M5 or more within 50 km:
- 5.3 Near Salt Lake City, Utah · 29 km NNE of this epicentre
- 5.0 1 km NE of Magna, Utah · 31 km NNW 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 40.4632, -111.9480. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Salt Lake County, UT | 23 km (14 mi) | N | earthquakes near Salt Lake County |
| Utah County, UT | 45 km (28 mi) | SSE | earthquakes near Utah County |
| Davis County, UT | 67 km (42 mi) | NNW | earthquakes near Davis County |
| Wasatch County, UT | 68 km (42 mi) | ESE | earthquakes near Wasatch County |
| Morgan County, UT | 76 km (48 mi) | NNE | earthquakes near Morgan County |
| Weber County, UT | 90 km (56 mi) | N | earthquakes near Weber County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 3.7 6 km NE of Magna, Utah
- 2.8 4 km NNE of Magna, Utah
- 2.2 7 km N of Magna, Utah
- 3.1 3 km NNW of Magna, Utah
- 3.0 6 km N of Magna, Utah
- 3.2 5 km NNE of Magna, Utah
- 3.7 5 km NNE of Magna, Utah
- 4.2 1 km NNW of Magna, Utah
- 4.0 4 km NNE of Magna, Utah
- 3.9 4 km NNE of Magna, Utah
- 5.7 5 km NNE of Magna, Utah
- 2.4 0 km WSW of Payson, Utah
- 1.9 1 km W of Payson, Utah
- 1.8 12 km SW of Charleston, Utah
- 2.2 7 km SSW of Herriman, 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.