QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

47 km NW of Stanley, Idaho

· 10 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Valley County 42 kmBoise County 70 kmCuster County 89 kmAdams County 98 kmGem County 102 kmWashington County 119 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
Magnitude
M 2.5 (ml)
Depth
10 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Valley County, 42 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2136 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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.

Where

Epicentre 44.5486, -115.3099. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Valley County, ID 42 km (26 mi) SE of here earthquakes near Valley County
Boise County, ID 70 km (44 mi) NNE of here earthquakes near Boise County
Custer County, ID 89 km (56 mi) WNW of here earthquakes near Custer County
Adams County, ID 98 km (61 mi) ESE of here earthquakes near Adams County
Gem County, ID 102 km (63 mi) ENE of here earthquakes near Gem County
Washington County, ID 119 km (74 mi) E of here earthquakes near Washington County

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

Aftershocks so far

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

  1. 2.0 35 km NW of Stanley, Idaho
  2. 2.1 36 km NW of Stanley, Idaho
  3. 2.0 35 km NW of Stanley, Idaho
  4. 1.8 9 km NNW of Stanley, Idaho
  5. 2.0 30 km NW of Stanley, Idaho
  6. 2.1 21 km WNW of Stanley, Idaho
  7. 2.0 20 km WNW of Stanley, Idaho
  8. 3.1 20 km WNW of Stanley, Idaho
  9. 1.9 31 km NW of Stanley, Idaho
  10. 1.6 22 km WNW of Stanley, Idaho
  11. 2.4 22 km WNW of Stanley, Idaho
  12. 2.2 southern Idaho
  13. 2.3 33 km NW of Stanley, Idaho
  14. 2.1 27 km NW of Stanley, Idaho
  15. 1.6 9 km NW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.5 on 2020-03-31 — it released about 1,000,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.