Earthquake · reviewed by a seismologist
M 1.5ml
Earthquake near Challis, ID
No earthquake was likely felt in Challis in the 24 hours to 1:37 am MST (08:37 UTC). The last one was M 2.0, 9 km (6 mi) SSW, at 1:32 am MDT on 17 August 2026, estimated intensity II (weak) in town. Every earthquake near Challis
This page: a magnitude 1.5 earthquake was recorded 43 km (27 mi) south-southwest of Challis, ID, at 2:48 pm MDT on 2 June 2021 (20:48 UTC), 10 km deep.
USGS: 12 km SW of Clayton, Idaho
- When
- 2:48 pm MDT on 2 June 2021 ()
- Where
- 43 km (27 mi) south-southwest of Challis, ID · earthquakes near Challis
- Idaho today
- every earthquake in Idaho in the last 24 hours
- Magnitude
- M 1.5 (ml)
- Depth
- 10 km below the surface
- Felt
- no reports yet
- Nearest
- Custer County, 23 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1988 days ago
Earthquake alerts for Challis, ID
Get a notification in this browser when USGS records an earthquake near Challis, ID. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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 3 km (2 mi) from the epicentre. In Challis, 43 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.
How big was it?
This earthquake released about 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
- Around the size people start to feel M 3.0 150× the energy of this one
- This earthquake M 1.5 about 6.2 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 2020-06-14 — about 9,800 times the energy of this one.
Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:
- 5.5 22 km E of Clayton, Idaho · 33 km ENE of this epicentre
- 5.4 29 km NW of Mackay, Idaho · 49 km ESE of this epicentre
- 5.4 23 km E of Clayton, Idaho · 32 km ENE of this epicentre
- 5.1 9 km SE of Challis, Idaho · 41 km NE of this epicentre
- 5.0 9 km E of Challis, Idaho · 49 km NE of this epicentre
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 44.1700, -114.5037. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Custer County, ID | 23 km (14 mi) | ENE | earthquakes near Custer County |
| Camas County, ID | 77 km (48 mi) | SSW | earthquakes near Camas County |
| Blaine County, ID | 97 km (60 mi) | SSE | earthquakes near Blaine County |
| Lemhi County, ID | 97 km (61 mi) | NNE | earthquakes near Lemhi County |
| Boise County, ID | 99 km (61 mi) | WSW | earthquakes near Boise County |
| Elmore County, ID | 116 km (72 mi) | SW | earthquakes near Elmore 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.
- 2.4 8 km N of Stanley, Idaho
- 1.9 6 km NNE of Stanley, Idaho
- 2.4 8 km NNW of Stanley, Idaho
- 2.0 southern Idaho
- 1.8 6 km NNE of Stanley, Idaho
- 1.8 6 km N of Stanley, Idaho
- 1.8 6 km NNE of Stanley, Idaho
- 2.0 12 km NW of Stanley, Idaho
- 1.9 10 km NW of Stanley, Idaho
- 2.0 12 km NE of Stanley, Idaho
- 2.2 19 km WSW of Challis, Idaho
- 1.8 11 km NNE of Stanley, Idaho
- 2.1 16 km SSW of Clayton, Idaho
- 1.7 10 km N of Stanley, Idaho
- 1.6 19 km NE 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.