Earthquake · reviewed by a seismologist
M 4.0mwr
Earthquake near Jackson, WY
No earthquake was likely felt in Jackson in the 24 hours to 5:30 am MST (12:30 UTC). The last one was M 2.7, 23 km (14 mi) S, at 6:18 pm MST on 6 November 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Jackson
This page: a magnitude 4.0 earthquake was recorded 31 km (19 mi) east of Jackson, WY, at 4:00 pm MST on 26 February 2016 (23:00 UTC), 5.5 km deep. 153 people have reported feeling it to USGS.
USGS: 23 km SE of Kelly, Wyoming
- When
- 4:00 pm MST on 26 February 2016 ()
- Where
- 31 km (19 mi) east of Jackson, WY · earthquakes near Jackson
- Magnitude
- M 4.0 (mwr)
- Depth
- 5.5 km below the surface
- Felt
- 153 reports · strongest reported intensity III
- Measured shaking
- intensity IV (ShakeMap)
- USGS impact alert
- green
- Nearest
- Teton County, 61 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3728 days ago
Earthquake alerts for Jackson, WY
Get a notification in this browser when USGS records an earthquake near Jackson, WY. 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 97 km (60 mi) from the epicentre. In Jackson, 31 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.
Likely felt in: Jackson 31 km, intensity III · Hoback 40 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 15 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 11,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 500× the energy of this one
- Magna, Utah 2020 M 5.7 350× the energy of this one
- This earthquake M 4.0 about 15 tons of TNT
- Around the size people start to feel M 3.0 this one released 32× 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:
- 5.0 20 km ESE of Kelly, Wyoming · 8 km N 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 43.5001, -110.3839. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Teton County, WY | 61 km (38 mi) | N | earthquakes near Teton County |
| Teton County, ID | 73 km (45 mi) | WNW | earthquakes near Teton County |
| Sublette County, WY | 90 km (56 mi) | SSE | earthquakes near Sublette County |
| Bonneville County, ID | 101 km (63 mi) | W | earthquakes near Bonneville County |
| Madison County, ID | 107 km (67 mi) | WNW | earthquakes near Madison County |
| Fremont County, ID | 119 km (74 mi) | NW | earthquakes near Fremont County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 2.1 19 km ESE of Jackson, Wyoming
- 1.7 5 km WSW of Rafter J Ranch, Wyoming
- 1.8 36 km ESE of Kelly, Wyoming
- 1.5 15 km ENE of Hoback, Wyoming
- 1.6 13 km WNW of Hoback, Wyoming
- 1.6 41 km ENE of Kelly, Wyoming
- 2.3 4 km SE of Hoback, Wyoming
- 1.8 1 km ESE of Hoback, Wyoming
- 1.6 20 km E of Kelly, Wyoming
- 1.9 19 km E of Kelly, Wyoming
- 2.5 23 km ESE of Kelly, Wyoming
- 1.9 12 km E of Kelly, Wyoming
- 2.8 10 km E of Hoback, Wyoming
- 2.5 14 km ENE of Bondurant, Wyoming
- 1.8 23 km ESE of Kelly, Wyoming
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.