QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

Earthquake near Conda, ID

No earthquake was likely felt in Conda in the 24 hours to 2:47 pm MST (21:47 UTC). The last one was M 2.1, 13 km (8 mi) SE, at 10:47 am MDT on 10 October 2026, estimated intensity II (weak) in town. Every earthquake near Conda

This page: a magnitude 2.8 earthquake was recorded 20 km (12 mi) south-southeast of Conda, ID, at 11:56 pm MDT on 5 September 2017 (05:56 UTC), 10 km deep.

USGS: 10 km NNW of Georgetown, Idaho

11:56 pm MDT, Sep 5, 2017 · · 10 km deep · released about 480 lb of TNT

Every earthquake near Conda Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Caribou County 26 kmBear Lake County 33 kmFranklin County 55 kmBannock County 67 kmLincoln County 72 kmBonneville County 93 kmCache County 97 kmOneida County 100 kmRich County 106 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
11:56 pm MDT on 5 September 2017 ()
Where
20 km (12 mi) south-southeast of Conda, ID · earthquakes near Conda
Idaho today
every earthquake in Idaho in the last 24 hours
Magnitude
M 2.8 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Caribou County, 26 km NNW
Nearest mapped fault
Western Bear Lake fault, 6 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 3261 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 25 km (16 mi) from the epicentre. In Conda, 20 km away, the estimate is intensity II (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: Soda Springs 17 km, intensity II · Conda 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 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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

The largest earthquake within 50 km since 2016 was M 5.3 on 2017-09-02 — about 5,600 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 5.8 4 km SSE of Auburn, Wyoming · 43 km ENE of this epicentre
  2. 5.3 Southeastern Idaho · 49 km NNE of this epicentre
  3. 5.3 29 km WSW of Freedom, Idaho · 40 km N 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 42.5698, -111.4272. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Caribou County, ID 26 km (16 mi) NNW earthquakes near Caribou County
Bear Lake County, ID 33 km (20 mi) SSE earthquakes near Bear Lake County
Franklin County, ID 55 km (34 mi) SW earthquakes near Franklin County
Bannock County, ID 67 km (42 mi) WNW earthquakes near Bannock County
Lincoln County, WY 72 km (45 mi) ESE earthquakes near Lincoln County
Bonneville County, ID 93 km (58 mi) N earthquakes near Bonneville County

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

Aftershocks so far

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

  1. 3.4 10 km NNW of Georgetown, Idaho
  2. 2.9 9 km NNW of Georgetown, Idaho
  3. 2.8 17 km NNE of Soda Springs, Idaho
  4. 3.1 12 km ESE of Soda Springs, Idaho
  5. 2.3 12 km NNW of Georgetown, Idaho
  6. 2.5 11 km NNW of Georgetown, Idaho
  7. 3.5 9 km NNW of Georgetown, Idaho
  8. 2.4 14 km ESE of Soda Springs, Idaho
  9. 2.1 10 km NNW of Georgetown, Idaho
  10. 1.7 11 km NNW of Georgetown, Idaho
  11. 2.1 9 km NNW of Georgetown, Idaho
  12. 2.3 12 km NNW of Georgetown, Idaho
  13. 2.1 10 km NNW of Georgetown, Idaho
  14. 1.6 10 km NNW of Georgetown, Idaho
  15. 1.8 southern 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.