QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Driggs, ID

No earthquake was likely felt in Driggs in the 24 hours to 9:58 am MST (16:58 UTC). The last one was M 3.9, 52 km (32 mi) ESE, at 11:07 pm MDT on 17 April 2025, estimated intensity II (weak) in town; 192 felt reports to USGS. Every earthquake near Driggs

This page: a magnitude 1.5 earthquake was recorded 42 km (26 mi) northeast of Driggs, ID, at 10:02 pm MDT on 31 May 2021 (04:02 UTC), 10 km deep.

USGS: 35 km NNE of Alta, Wyoming

10:02 pm MDT, May 31, 2021 · · 10 km deep · released about 6.2 lb of TNT

10 km30 km60 km120 km N Teton County 30 kmTeton County 44 kmFremont County 59 kmMadison County 73 kmBonneville County 96 kmPark County 109 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
10:02 pm MDT on 31 May 2021 ()
Where
42 km (26 mi) northeast of Driggs, ID · earthquakes near Driggs
Magnitude
M 1.5 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Teton County, 30 km E
Nearest mapped fault
Teton fault, 9 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 1988 days ago

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 2 km (1 mi) from the epicentre. In Driggs, 42 km away, the estimate is intensity I (not felt). 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.

How big was it?

This earthquake released about 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 44.0233, -110.8015. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Teton County, WY 30 km (19 mi) E earthquakes near Teton County
Teton County, ID 44 km (27 mi) SW earthquakes near Teton County
Fremont County, ID 59 km (36 mi) WNW earthquakes near Fremont County
Madison County, ID 73 km (46 mi) WSW earthquakes near Madison County
Bonneville County, ID 96 km (60 mi) SW earthquakes near Bonneville County
Park County, WY 109 km (68 mi) ENE earthquakes near Park County

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

Aftershocks so far

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

  1. 1.9 23 km NE of Kelly, Wyoming
  2. 1.9 45 km ENE of Warm River, Idaho
  3. 1.8 45 km ENE of Warm River, Idaho
  4. 2.0 44 km ENE of Warm River, Idaho
  5. 1.8 45 km ENE of Warm River, Idaho
  6. 1.6 45 km ENE of Warm River, Idaho
  7. 2.5 38 km SE of West Yellowstone, Montana
  8. 1.7 Wyoming

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.