Earthquake · reviewed by a seismologist
M 4.1mwr
Earthquake near Grangeville, ID
No earthquake was likely felt in Grangeville in the 24 hours to 12:10 pm PST (20:10 UTC). The last one was M 4.3, 103 km (64 mi) SW, at 11:42 pm PST on 9 November 2026, estimated intensity II (weak) in town; 136 felt reports to USGS. Every earthquake near Grangeville
This page: a magnitude 4.1 earthquake was recorded 27 km (17 mi) east of Grangeville, ID, at 2:39 pm PST on 20 November 2018 (22:39 UTC), 13 km deep. 96 people have reported feeling it to USGS.
USGS: 21 km SE of Stites, Idaho
- When
- 2:39 pm PST on 20 November 2018 ()
- Where
- 27 km (17 mi) east of Grangeville, ID · earthquakes near Grangeville
- Idaho today
- every earthquake in Idaho in the last 24 hours
- Magnitude
- M 4.1 (mwr)
- Depth
- 13 km below the surface
- Felt
- 96 reports · strongest reported intensity VI
- Measured shaking
- intensity IV (ShakeMap)
- USGS impact alert
- green
- Nearest
- Idaho County, 27 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2418 days ago
Earthquake alerts for Grangeville, ID
Get a notification in this browser when USGS records an earthquake near Grangeville, 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 104 km (65 mi) from the epicentre. In Grangeville, 27 km away, the estimate is intensity III (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.
How big was it?
This earthquake released about 21 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 7,900× the energy of this one
- Mineral, Virginia 2011 M 5.8 350× the energy of this one
- Magna, Utah 2020 M 5.7 250× the energy of this one
- This earthquake M 4.1 about 21 tons of TNT
- Around the size people start to feel M 3.0 this one released 45× 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 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 45.9525, -115.7774. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Idaho County, ID | 27 km (17 mi) | ESE | earthquakes near Idaho County |
| Lewis County, ID | 59 km (37 mi) | WNW | earthquakes near Lewis County |
| Clearwater County, ID | 81 km (50 mi) | N | earthquakes near Clearwater County |
| Nez Perce County, ID | 87 km (54 mi) | WNW | earthquakes near Nez Perce County |
| Asotin County, WA | 115 km (71 mi) | WNW | earthquakes near Asotin County |
| Wallowa County, OR | 116 km (72 mi) | WSW | earthquakes near Wallowa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
10 earthquakes have been recorded within 50 km since this one.
- 2.2 4 km SSE of Grangeville, Idaho
- 1.7 26 km NE of Riggins, Idaho
- 2.2 11 km SE of Weippe, Idaho
- 1.7 28 km ESE of Weippe, Idaho
- 1.6 20 km SE of White Bird, Idaho
- 1.8 Northern Idaho
- 1.7 Northern Idaho
- 1.5 7 km WNW of Grangeville, Idaho
- 2.4 28 km SSW of Elk City, Idaho
- 1.6 2 km E of Kamiah, 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.