QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

47 km SSW of Stanley, Idaho

Yes. A magnitude 2.2 earthquake was recorded 47 km SSW of Stanley, Idaho, 91 km (56 mi) ENE of Boise City, ID, at 6:39 pm MDT on 18 June 2023 (00:39 UTC), 10 km deep.

91 km (56 mi) ENE of Boise City, ID

· 10 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Camas County 45 kmBoise County 50 kmElmore County 54 kmCuster County 87 kmGooding County 97 kmAda County 98 kmGem County 105 kmBlaine 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
Idaho today
every earthquake in Idaho in the last 24 hours
Magnitude
M 2.2 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Camas County, 45 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1173 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 16 km (10 mi) from the epicentre. 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.

How big was it?

This earthquake released about 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 4.2 on 2020-08-08 — about 1,000 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 43.8110, -115.1372. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Camas County, ID 45 km (28 mi) SE earthquakes near Camas County
Boise County, ID 50 km (31 mi) WNW earthquakes near Boise County
Elmore County, ID 54 km (33 mi) SSW earthquakes near Elmore County
Custer County, ID 87 km (54 mi) NE earthquakes near Custer County
Gooding County, ID 97 km (60 mi) SSE earthquakes near Gooding County
Ada County, ID 98 km (61 mi) WSW earthquakes near Ada County

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

Aftershocks so far

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

  1. 1.8 4 km NW of Stanley, Idaho
  2. 2.4 14 km WNW of Stanley, Idaho
  3. 1.9 14 km W of Stanley, Idaho
  4. 2.4 29 km SW of Stanley, Idaho
  5. 1.6 4 km NW of Stanley, Idaho
  6. 1.7 13 km W of Stanley, Idaho
  7. 1.9 14 km W of Stanley, Idaho
  8. 2.9 14 km W of Stanley, Idaho
  9. 1.9 13 km SW of Stanley, Idaho
  10. 2.7 14 km SW of Stanley, Idaho
  11. 1.8 13 km SW of Stanley, Idaho
  12. 2.2 13 km W of Stanley, Idaho
  13. 2.2 12 km SW of Stanley, Idaho
  14. 2.3 13 km SW of Stanley, Idaho
  15. 2.1 13 km W of Stanley, 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.