QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Conda, ID

No earthquake was likely felt in Conda in the 24 hours to 4:53 pm MST (23:53 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 1.7 earthquake was recorded 39 km (24 mi) east of Conda, ID, at 2:54 am MDT on 27 September 2017 (08:54 UTC), 5.0 km deep.

USGS: 7 km WSW of Fairview, Wyoming

2:54 am MDT, Sep 27, 2017 · · 5.0 km deep · released about 11 lb of TNT

Every earthquake near Conda Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Caribou County 42 kmBear Lake County 47 kmLincoln County 57 kmFranklin County 83 kmBonneville County 93 kmSublette County 94 kmBannock County 95 kmRich County 116 kmCache County 118 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
2:54 am MDT on 27 September 2017 ()
Where
39 km (24 mi) east of Conda, ID · earthquakes near Conda
Magnitude
M 1.7 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Caribou County, 42 km WNW
Nearest mapped fault
Grand Valley fault, 11 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 3331 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 12 km (7 mi) from the epicentre. In Conda, 39 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.

Earthquakes near other towns within 30 km: Afton.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 230,000 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 · 13 km NNE of this epicentre
  2. 5.3 Southeastern Idaho · 42 km NNW of this epicentre
  3. 5.3 29 km WSW of Freedom, Idaho · 40 km NW 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 42.6647, -111.0617. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Caribou County, ID 42 km (26 mi) WNW earthquakes near Caribou County
Bear Lake County, ID 47 km (29 mi) SSW earthquakes near Bear Lake County
Lincoln County, WY 57 km (36 mi) SSE earthquakes near Lincoln County
Franklin County, ID 83 km (52 mi) SW earthquakes near Franklin County
Bonneville County, ID 93 km (58 mi) NNW earthquakes near Bonneville County
Sublette County, WY 94 km (59 mi) E earthquakes near Sublette County

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

Aftershocks so far

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

  1. 2.0 8 km NNW of Georgetown, Idaho
  2. 2.9 9 km NNW of Georgetown, Idaho
  3. 4.1 8 km NNW of Georgetown, Idaho
  4. 1.5 13 km E of Soda Springs, Idaho
  5. 2.1 15 km N of Georgetown, Idaho
  6. 2.2 13 km E of Soda Springs, Idaho
  7. 1.7 12 km E of Soda Springs, Idaho
  8. 1.5 13 km E of Soda Springs, Idaho
  9. 1.7 12 km NNW of Georgetown, Idaho
  10. 1.7 12 km NNW of Georgetown, Idaho
  11. 2.3 12 km NNW of Georgetown, Idaho
  12. 2.3 13 km ESE of Soda Springs, Idaho
  13. 3.0 13 km NNW of Georgetown, Idaho
  14. 3.2 14 km NNW of Georgetown, Idaho
  15. 2.3 14 km NNW of Georgetown, 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.