QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

Earthquake near Bluffdale, UT

No earthquake was likely felt in Bluffdale in the 24 hours to 12:28 pm MST (19:28 UTC). The last one was M 2.0, 9 km (5 mi) S, at 2:07 pm MDT on 19 September 2026, estimated intensity II (weak) in town; 11 felt reports to USGS. Every earthquake near Bluffdale

This page: a magnitude 3.1 earthquake was recorded in Bluffdale, UT, at 2:31 am MST on 23 February 2019 (09:31 UTC), 8.6 km deep. 3,638 people have reported feeling it to USGS.

USGS: 1 km SSW of Bluffdale, Utah

15 km (9 mi) SSE of West Jordan, UT · 6 km (4 mi) ESE of Herriman, UT

2:31 am MST, Feb 23, 2019 · · 8.6 km deep · released about 1,300 lb of TNT

Every earthquake near Bluffdale Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salt Lake County 22 kmUtah County 46 kmDavis County 66 kmWasatch County 69 kmMorgan County 75 kmWeber County 89 kmSummit County 94 kmTooele County 99 kmJuab County 111 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
2:31 am MST on 23 February 2019 ()
Where
in Bluffdale, UT · earthquakes near Bluffdale
Magnitude
M 3.1 (ml)
Depth
8.6 km below the surface
Felt
3,638 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Salt Lake County, 22 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 2743 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 41 km (25 mi) from the epicentre. 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: Riverton 5 km, intensity III · Herriman 8 km, intensity III · Draper 9 km, intensity III · South Jordan 10 km, intensity III · Sandy 14 km, intensity III · West Jordan 15 km, intensity III · Midvale 16 km, intensity III · Cottonwood Heights 20 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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:

  1. 5.3 Near Salt Lake City, Utah · 28 km NNE of this epicentre
  2. 5.0 1 km NE of Magna, Utah · 30 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 40.4743, -111.9497. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Salt Lake County, UT 22 km (13 mi) N earthquakes near Salt Lake County
Utah County, UT 46 km (29 mi) SSE earthquakes near Utah County
Davis County, UT 66 km (41 mi) NNW earthquakes near Davis County
Wasatch County, UT 69 km (43 mi) ESE earthquakes near Wasatch County
Morgan County, UT 75 km (47 mi) NNE earthquakes near Morgan County
Weber County, UT 89 km (55 mi) N earthquakes near Weber County

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

Aftershocks so far

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

  1. 2.3 7 km NNE of Magna, Utah
  2. 3.5 5 km NNE of Magna, Utah
  3. 1.9 5 km NNE of Magna, Utah
  4. 2.0 6 km NNE of Magna, Utah
  5. 2.4 6 km NE of Magna, Utah
  6. 3.9 6 km NE of Magna, Utah
  7. 3.1 7 km NE of Magna, Utah
  8. 3.1 5 km NE of Magna, Utah
  9. 2.5 6 km NE of Magna, Utah
  10. 2.3 7 km NNE of Magna, Utah
  11. 3.7 4 km N of Magna, Utah
  12. 3.6 4 km N of Magna, Utah
  13. 3.7 6 km NE of Magna, Utah
  14. 2.2 6 km NNE of Magna, Utah
  15. 2.4 6 km NNE of Magna, 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.