Earthquake · reviewed by a seismologist
M 2.0ml
Earthquake near Ketchum, ID
No earthquake was likely felt in Ketchum in the 24 hours to 4:03 am MST (11:03 UTC). The last one was M 4.3, 68 km (43 mi) NNE, at 11:05 am MDT on 8 June 2025, estimated intensity II (weak) in town; 27 felt reports to USGS. Every earthquake near Ketchum
This page: a magnitude 2.0 earthquake was recorded 47 km (29 mi) north of Ketchum, ID, at 11:54 pm MDT on 10 April 2018 (05:54 UTC), 17 km deep.
USGS: 22 km SSE of Clayton, Idaho
- When
- 11:54 pm MDT on 10 April 2018 ()
- Where
- 47 km (29 mi) north of Ketchum, ID · earthquakes near Ketchum
- Idaho today
- every earthquake in Idaho in the last 24 hours
- Magnitude
- M 2.0 (ml)
- Depth
- 17 km below the surface
- Felt
- no reports yet
- Nearest
- Custer County, 20 km N
- Nearest mapped fault
- Lone Pine fault, 25 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3138 days ago
Earthquake alerts for Ketchum, ID
Get a notification in this browser when USGS records an earthquake near Ketchum, 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 it was probably too small to be felt, even directly above it. In Ketchum, 47 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 28 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 540,000× the energy of this one
- Magna, Utah 2020 M 5.7 380,000× the energy of this one
- Around the size people start to feel M 3.0 34× the energy of this one
- This earthquake M 2.0 about 28 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 lists 7 earthquakes of M5 or more within 50 km; the five largest:
- 6.9 The 1983 Borah Peak Earthquake, Idaho · 32 km E of this epicentre
- 5.6 18 km ESE of Challis, Idaho · 46 km NNE of this epicentre
- 5.5 22 km E of Clayton, Idaho · 24 km NNE of this epicentre
- 5.4 29 km NW of Mackay, Idaho · 27 km E of this epicentre
- 5.4 23 km E of Clayton, Idaho · 19 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 44.0923, -114.2500. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Custer County, ID | 20 km (13 mi) | N | earthquakes near Custer County |
| Camas County, ID | 78 km (48 mi) | SSW | earthquakes near Camas County |
| Blaine County, ID | 81 km (50 mi) | SSE | earthquakes near Blaine County |
| Butte County, ID | 97 km (60 mi) | ESE | earthquakes near Butte County |
| Lemhi County, ID | 97 km (60 mi) | NNE | earthquakes near Lemhi County |
| Boise County, ID | 118 km (73 mi) | W | earthquakes near Boise County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 1.5 35 km NW of Mackay, Idaho
- 2.3 12 km SE of Challis, Idaho
- 1.7 25 km SE of Challis, Idaho
- 2.4 25 km SSW of Clayton, Idaho
- 1.7 24 km E of Clayton, Idaho
- 1.8 4 km WNW of Challis, Idaho
- 2.1 8 km SE of Clayton, Idaho
- 1.7 4 km NW of Challis, Idaho
- 1.8 28 km NW of Mackay, Idaho
- 1.5 11 km W of Clayton, Idaho
- 1.6 11 km W of Clayton, Idaho
- 1.7 southern Idaho
- 1.8 15 km SSE of Clayton, Idaho
- 2.4 20 km SE of Challis, Idaho
- 1.6 24 km E of Clayton, 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.