QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

Earthquake near Osburn, ID

No earthquake was likely felt in Osburn in the 24 hours to 1:42 pm PST (21:42 UTC). The last one was M 2.3, 5 km (3 mi) SSE, at 2:46 pm PST on 3 March 2026, estimated intensity III (weak) in town. Every earthquake near Osburn

This page: a magnitude 2.6 earthquake was recorded 14 km (8 mi) east of Osburn, ID, at 5:29 pm PDT on 24 September 2020 (00:29 UTC), 10 km deep. 1 person has reported feeling it to USGS.

USGS: 2 km NNW of Mullan, Idaho

5:29 pm PDT, Sep 24, 2020 · · 10 km deep · released about 240 lb of TNT

10 km30 km60 km120 km N Shoshone County 17 kmSanders County 56 kmBenewah County 68 kmMineral County 68 kmKootenai County 69 kmClearwater County 92 kmLatah County 102 kmBonner County 110 kmSpokane County 120 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
5:29 pm PDT on 24 September 2020 ()
Where
14 km (8 mi) east of Osburn, ID · earthquakes near Osburn
Idaho today
every earthquake in Idaho in the last 24 hours
Magnitude
M 2.6 (ml)
Depth
10 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Shoshone County, 17 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2167 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 21 km (13 mi) from the epicentre. In Osburn, 14 km away, the estimate is intensity II (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: Osburn 14 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

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 47.4911, -115.8206. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Shoshone County, ID 17 km (10 mi) SSW earthquakes near Shoshone County
Sanders County, MT 56 km (35 mi) ENE earthquakes near Sanders County
Benewah County, ID 68 km (42 mi) WSW earthquakes near Benewah County
Mineral County, MT 68 km (43 mi) SE earthquakes near Mineral County
Kootenai County, ID 69 km (43 mi) WNW earthquakes near Kootenai County
Clearwater County, ID 92 km (57 mi) S earthquakes near Clearwater County

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

Aftershocks so far

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

  1. 1.0 1 km WSW of Wallace, Idaho
  2. 2.3 3 km WSW of Wallace, Idaho
  3. 1.6 2 km SSE of Osburn, Idaho
  4. 2.3 1 km E of Mullan, Idaho
  5. 1.6 0 km ENE of Mullan, Idaho
  6. 3.3 2 km NNW of Mullan, Idaho
  7. 1.6 1 km E of Mullan, Idaho
  8. 2.4 20 km N of Kellogg, Idaho
  9. 2.1 19 km N of Kellogg, Idaho
  10. 1.9 0 km SE of Mullan, Idaho
  11. 1.9 19 km N of Kellogg, Idaho
  12. 1.7 1 km E of Mullan, Idaho
  13. 1.6 0 km E of Mullan, Idaho
  14. 2.0 1 km SE of Mullan, Idaho
  15. 2.4 1 km NNE of Mullan, 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.