QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0mwr

Earthquake near Conda, ID

No earthquake was likely felt in Conda in the 24 hours to 5:26 pm MST (00:26 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 4.0 earthquake was recorded 28 km (18 mi) south-southeast of Conda, ID, at 8:53 pm MDT on 13 September 2017 (02:53 UTC), 10 km deep. 10 people have reported feeling it to USGS.

USGS: 3 km WNW of Georgetown, Idaho

8:53 pm MDT, Sep 13, 2017 · · 10 km deep · released about 15 tons of TNT

Every earthquake near Conda Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bear Lake County 24 kmCaribou County 35 kmFranklin County 49 kmLincoln County 67 kmBannock County 71 kmCache County 88 kmRich County 97 kmOneida County 97 kmBonneville County 102 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
8:53 pm MDT on 13 September 2017 ()
Where
28 km (18 mi) south-southeast of Conda, ID · earthquakes near Conda
Idaho today
every earthquake in Idaho in the last 24 hours
Magnitude
M 4.0 (mwr)
Depth
10 km below the surface
Felt
10 reports · strongest reported intensity IV
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Nearest
Bear Lake County, 24 km SSE
Nearest mapped fault
Western Bear Lake fault, 3 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 1609 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 96 km (60 mi) from the epicentre. In Conda, 28 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 21 km, intensity III · Soda Springs 24 km, intensity III · Conda 28 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 15 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 11,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 500× the energy of this one
  3. Magna, Utah 2020 M 5.7 350× the energy of this one
  4. This earthquake M 4.0 about 15 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 32× 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 89 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.8 4 km SSE of Auburn, Wyoming · 47 km NE of this epicentre
  2. 5.3 29 km WSW of Freedom, Idaho · 49 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 42.4888, -111.4132. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Bear Lake County, ID 24 km (15 mi) SSE earthquakes near Bear Lake County
Caribou County, ID 35 km (22 mi) NNW earthquakes near Caribou County
Franklin County, ID 49 km (30 mi) SW earthquakes near Franklin County
Lincoln County, WY 67 km (41 mi) ESE earthquakes near Lincoln County
Bannock County, ID 71 km (44 mi) WNW earthquakes near Bannock County
Cache County, UT 88 km (55 mi) SSW earthquakes near Cache 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. 1.8 13 km NNW of Georgetown, Idaho
  2. 3.0 13 km NNW of Georgetown, Idaho
  3. 2.1 11 km NNW of Georgetown, Idaho
  4. 1.6 14 km NNW of Georgetown, Idaho
  5. 3.6 12 km NNW of Georgetown, Idaho
  6. 1.9 10 km NNW of Georgetown, Idaho
  7. 1.5 13 km NNW of Georgetown, Idaho
  8. 2.0 14 km NNW of Georgetown, Idaho
  9. 2.1 8 km NNW of Georgetown, Idaho
  10. 1.8 10 km NNW of Georgetown, Idaho
  11. 1.6 6 km NW of Georgetown, Idaho
  12. 2.3 6 km NW of Georgetown, Idaho
  13. 1.9 10 km NW of Georgetown, Idaho
  14. 1.7 13 km NNW of Georgetown, Idaho
  15. 2.6 13 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.