QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

17 km SSE of Midvale, Idaho

· -1.7 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 19 kmGem County 35 kmPayette County 38 kmAdams County 62 kmCanyon County 79 kmBoise County 82 kmBaker County 94 kmValley County 99 kmAda County 103 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 1.8 (md)
Depth
-1.7 km below the surface
Felt
no reports yet
Nearest
Washington County, 19 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 765 days ago

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

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 44.3330, -116.6222. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, ID 19 km (12 mi) SE of here earthquakes near Washington County
Gem County, ID 35 km (22 mi) NNW of here earthquakes near Gem County
Payette County, ID 38 km (24 mi) NNE of here earthquakes near Payette County
Adams County, ID 62 km (38 mi) SSW of here earthquakes near Adams County
Canyon County, ID 79 km (49 mi) N of here earthquakes near Canyon County
Boise County, ID 82 km (51 mi) WNW of here earthquakes near Boise County

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

Aftershocks so far

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

  1. 1.7 4 km N of Emmett, Idaho
  2. 1.7 12 km WNW of Cascade, Idaho
  3. 1.8 6 km N of Smiths Ferry, Idaho
  4. 2.0 7 km NNW of Smiths Ferry, Idaho
  5. 2.1 6 km NNW of Smiths Ferry, Idaho
  6. 2.1 8 km NNW of Smiths Ferry, Idaho
  7. 2.1 6 km NNW of Smiths Ferry, Idaho
  8. 1.6 8 km N of Smiths Ferry, Idaho
  9. 2.1 7 km NNW of Smiths Ferry, Idaho
  10. 1.6 6 km NNW of Smiths Ferry, Idaho
  11. 1.8 6 km NNW of Smiths Ferry, Idaho
  12. 2.0 7 km N of Smiths Ferry, Idaho
  13. 2.4 8 km N of Smiths Ferry, Idaho
  14. 1.6 7 km N of Smiths Ferry, Idaho
  15. 1.8 6 km NNW of Smiths Ferry, 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 4.9 on 2024-02-26 — it released about 45,000 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.