Earthquake · reviewed by a seismologist
M 3.1ml
Oregon-Idaho border region
Yes. A magnitude 3.1 earthquake was recorded in the Oregon-Idaho border region, 78 km (49 mi) N of Boise City, ID, at 5:17 am MDT on 14 March 2021 (11:17 UTC), 12 km deep. 11 people have reported feeling it to USGS.
78 km (49 mi) N of Boise City, ID
- When
- Magnitude
- M 3.1 (ml)
- Depth
- 12 km below the surface
- Felt
- 11 reports · strongest reported intensity IV
- Nearest
- Gem County, 32 km SW
- Nearest mapped fault
- Squaw Creek fault, 13 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 1996 days ago
Earthquake alerts for Emmett, ID
Get a notification in this browser when USGS records an earthquake near Emmett, 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 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 40 km (25 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 250,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
- Magna, Utah 2020 M 5.7 7,900× the energy of this one
- This earthquake M 3.1 about 1,300 lb of TNT
- Around the size people start to feel M 3.0 this one released 1.4× 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.
Where
Epicentre 44.3022, -116.1711. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Gem County, ID | 32 km (20 mi) | SW | earthquakes near Gem County |
| Boise County, ID | 50 km (31 mi) | SE | earthquakes near Boise County |
| Washington County, ID | 52 km (33 mi) | WNW | earthquakes near Washington County |
| Payette County, ID | 57 km (35 mi) | SW | earthquakes near Payette County |
| Adams County, ID | 68 km (42 mi) | NNW | earthquakes near Adams County |
| Valley County, ID | 76 km (47 mi) | NE | earthquakes near Valley 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 6 km WSW of Smiths Ferry, Idaho
- 3.7 11 km S of Donnelly, Idaho
- 2.6 11 km WSW of Smiths Ferry, Idaho
- 2.6 8 km W of Smiths Ferry, Idaho
- 1.6 11 km WSW of Smiths Ferry, Idaho
- 2.7 14 km W of Smiths Ferry, Idaho
- 2.9 12 km WSW of Smiths Ferry, Idaho
- 2.2 9 km WSW of Smiths Ferry, Idaho
- 1.8 Oregon-Idaho border region
- 3.4 14 km SW of Smiths Ferry, Idaho
- 1.8 10 km NNW of Cascade, Idaho
- 2.1 5 km N of Smiths Ferry, Idaho
- 1.9 6 km S of Cascade, Idaho
- 1.6 8 km WNW of Smiths Ferry, Idaho
- 2.0 9 km NNE of Cascade, 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.