QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Conda, ID

No earthquake was likely felt in Conda in the 24 hours to 3:30 pm MST (22:30 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 1.6 earthquake was recorded 30 km (18 mi) south of Conda, ID, at 4:34 am MDT on 27 July 2018 (10:34 UTC), 12 km deep.

USGS: 14 km W of Georgetown, Idaho

4:34 am MDT, Jul 27, 2018 · · 12 km deep · released about 6.6 lb of TNT

10 km30 km60 km120 km N Bear Lake County 27 kmCaribou County 36 kmFranklin County 39 kmBannock County 61 kmLincoln County 76 kmCache County 83 kmOneida County 86 kmRich County 96 kmBonneville County 104 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
4:34 am MDT on 27 July 2018 ()
Where
30 km (18 mi) south of Conda, ID · earthquakes near Conda
Idaho today
every earthquake in Idaho in the last 24 hours
Magnitude
M 1.6 (ml)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Bear Lake County, 27 km SE
Nearest mapped fault
Western Bear Lake fault, 8 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 3026 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Conda, 30 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: Soda Springs, Montpelier.

How big was it?

This earthquake released about 6.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.6 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 410,000 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 42.4628, -111.5477. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Bear Lake County, ID 27 km (17 mi) SE earthquakes near Bear Lake County
Caribou County, ID 36 km (22 mi) N earthquakes near Caribou County
Franklin County, ID 39 km (24 mi) SW earthquakes near Franklin County
Bannock County, ID 61 km (38 mi) WNW earthquakes near Bannock County
Lincoln County, WY 76 km (47 mi) ESE earthquakes near Lincoln County
Cache County, UT 83 km (51 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. 2.1 southern Idaho
  2. 3.0 9 km E of Soda Springs, Idaho
  3. 1.8 10 km E of Soda Springs, Idaho
  4. 2.0 10 km E of Soda Springs, Idaho
  5. 3.2 9 km E of Soda Springs, Idaho
  6. 2.3 15 km WSW of Fairview, Wyoming
  7. 2.1 17 km SW of Fairview, Wyoming
  8. 2.2 9 km NW of Georgetown, Idaho
  9. 2.0 15 km NNW of Georgetown, Idaho
  10. 1.8 19 km SW of Fairview, Wyoming
  11. 2.0 3 km WNW of Montpelier, Idaho
  12. 2.3 13 km NNW of Georgetown, Idaho
  13. 2.4 19 km SW of Fairview, Wyoming
  14. 2.1 12 km E of Soda Springs, Idaho
  15. 1.6 10 km WSW 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.