Earthquake · reviewed by a seismologist
M 4.9mww
10 km N of Smiths Ferry, Idaho
Yes. A magnitude 4.9 earthquake was recorded 10 km N of Smiths Ferry, Idaho, 89 km (55 mi) N of Boise City, ID, at 10:25 am MST on 26 February 2024 (17:25 UTC), 12 km deep. 3,130 people have reported feeling it to USGS.
89 km (55 mi) N of Boise City, ID
- When
- Idaho today
- every earthquake in Idaho in the last 24 hours
- Magnitude
- M 4.9 (mww)
- Depth
- 12 km below the surface
- Felt
- 3,130 reports · strongest reported intensity VII
- Measured shaking
- intensity VI (ShakeMap)
- USGS impact alert
- green
- Nearest
- Gem County, 43 km SSW
- Nearest mapped fault
- Squaw Creek fault, 18 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 275 days ago
Earthquake alerts for McCall, ID
Get a notification in this browser when USGS records an earthquake near McCall, 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 light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.
At this magnitude and depth, people at rest would likely notice it out to about 181 km (112 mi) from the epicentre. 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 340 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.9 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 500× the energy of this one
- Mineral, Virginia 2011 M 5.8 22× the energy of this one
- Magna, Utah 2020 M 5.7 16× the energy of this one
- This earthquake M 4.9 about 340 tons of TNT
- Around the size people start to feel M 3.0 this one released 710× more
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 (31 mi) since our catalogue begins in 2016. No other earthquake of M4 or more has been recorded this close in that time.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.3 Western Idaho · 38 km SW 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 44.3907, -116.1108. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Gem County, ID | 43 km (27 mi) | SSW | earthquakes near Gem County |
| Boise County, ID | 55 km (34 mi) | SE | earthquakes near Boise County |
| Washington County, ID | 55 km (34 mi) | W | earthquakes near Washington County |
| Adams County, ID | 61 km (38 mi) | NNW | earthquakes near Adams County |
| Valley County, ID | 65 km (40 mi) | NE | earthquakes near Valley County |
| Payette County, ID | 67 km (42 mi) | SW | earthquakes near Payette 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.
- 2.6 7 km NW of Smiths Ferry, Idaho
- 2.5 8 km NNW of Smiths Ferry, Idaho
- 3.3 8 km NW of Smiths Ferry, Idaho
- 1.9 16 km WSW of Cascade, Idaho
- 2.6 8 km NNW of Smiths Ferry, Idaho
- 2.6 7 km NNW of Smiths Ferry, Idaho
- 2.2 8 km NW of Smiths Ferry, Idaho
- 1.8 7 km NNW of Smiths Ferry, Idaho
- 2.4 7 km NNW of Smiths Ferry, Idaho
- 3.5 8 km N of Smiths Ferry, Idaho
- 2.0 7 km NNW of Smiths Ferry, Idaho
- 2.9 8 km NNW of Smiths Ferry, Idaho
- 2.1 7 km N of Smiths Ferry, Idaho
- 2.4 6 km NNW of Smiths Ferry, Idaho
- 2.1 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.
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.