QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8ml

Earthquake near Montpelier, ID

No earthquake was likely felt in Montpelier in the 24 hours to 8:26 am MST (15:26 UTC). The last one was M 2.5, 19 km (12 mi) WNW, at 9:59 pm MST on 7 November 2026, estimated intensity II (weak) in town. Every earthquake near Montpelier

This page: a magnitude 3.8 earthquake was recorded 13 km (8 mi) northwest of Montpelier, ID, at 5:05 am MDT on 15 May 2026 (11:05 UTC), 1.4 km deep. 29 people have reported feeling it to USGS.

USGS: 8 km W of Bennington, Idaho

5:05 am MDT, May 15, 2026 · · 1.4 km deep · released about 7.8 tons of TNT

10 km30 km60 km120 km N Bear Lake County 14 kmFranklin County 41 kmCaribou County 45 kmLincoln County 64 kmBannock County 74 kmCache County 78 kmRich County 86 kmOneida County 93 kmBonneville County 113 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
5:05 am MDT on 15 May 2026 ()
Where
13 km (8 mi) northwest of Montpelier, ID · earthquakes near Montpelier
Idaho today
every earthquake in Idaho in the last 24 hours
Magnitude
M 3.8 (ml)
Depth
1.4 km below the surface
Felt
29 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Bear Lake County, 14 km SE
Nearest mapped fault
Western Bear Lake fault, 4 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 109 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 83 km (52 mi) from the epicentre. In Montpelier, 13 km away, the estimate is intensity III (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.

Likely felt in: Montpelier 13 km, intensity III · Soda Springs 33 km, intensity III · Conda 38 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 7.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 970× the energy of this one
  3. Magna, Utah 2020 M 5.7 680× the energy of this one
  4. This earthquake M 3.8 about 7.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× 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

The largest earthquake within 50 km since 2016 was M 5.3 on 2017-09-02 — about 170 times the energy of this one.

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 42.3928, -111.4245. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Bear Lake County, ID 14 km (9 mi) SE earthquakes near Bear Lake County
Franklin County, ID 41 km (25 mi) SW earthquakes near Franklin County
Caribou County, ID 45 km (28 mi) NNW earthquakes near Caribou County
Lincoln County, WY 64 km (40 mi) ESE earthquakes near Lincoln County
Bannock County, ID 74 km (46 mi) WNW earthquakes near Bannock County
Cache County, UT 78 km (48 mi) SSW earthquakes near Cache County

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

Aftershocks so far

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

  1. 2.5 15 km SW of Georgetown, Idaho
  2. 2.2 18 km NE of Georgetown, Idaho
  3. 1.8 11 km E of Georgetown, Idaho
  4. 2.3 8 km SW of Georgetown, Idaho
  5. 2.9 7 km W of Bennington, Idaho
  6. 2.1 15 km E of Soda Springs, Idaho
  7. 1.5 11 km E of Bancroft, Idaho
  8. 1.6 9 km NW of Georgetown, Idaho
  9. 1.9 6 km W of Bennington, Idaho
  10. 1.8 7 km WSW of Bennington, Idaho
  11. 1.9 11 km NW of Georgetown, Idaho
  12. 1.9 9 km NW of Georgetown, Idaho
  13. 2.2 7 km WNW of Bennington, Idaho
  14. 1.5 6 km WSW of Bennington, Idaho
  15. 2.0 6 km W of Bennington, Idaho

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.