Earthquake · reviewed by a seismologist
M 2.2ml
Earthquake near Thermopolis, WY
No earthquake was likely felt in Thermopolis in the 24 hours to 7:42 am MST (14:42 UTC). The last one was M 2.6, 19 km (12 mi) E, at 9:20 am MST on 8 March 2025, estimated intensity II (weak) in town. Every earthquake near Thermopolis
This page: a magnitude 2.2 earthquake was recorded 30 km (18 mi) northwest of Thermopolis, WY, at 3:50 am MDT on 28 March 2017 (09:50 UTC), 6.3 km deep.
USGS: 6 km ENE of Owl Creek, Wyoming
- When
- 3:50 am MDT on 28 March 2017 ()
- Where
- 30 km (18 mi) northwest of Thermopolis, WY · earthquakes near Thermopolis
- Magnitude
- M 2.2 (ml)
- Depth
- 6.3 km below the surface
- Felt
- no reports yet
- Nearest
- Hot Springs County, 12 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3515 days ago
Earthquake alerts for Thermopolis, WY
Get a notification in this browser when USGS records an earthquake near Thermopolis, 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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 17 km (11 mi) from the epicentre. In Thermopolis, 30 km away, the estimate is intensity II (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 52 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 290,000× the energy of this one
- Magna, Utah 2020 M 5.7 200,000× the energy of this one
- Around the size people start to feel M 3.0 18× the energy of this one
- This earthquake M 2.2 about 52 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 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 43.8145, -108.4958. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Hot Springs County, WY | 12 km (7 mi) | SSE | earthquakes near Hot Springs County |
| Washakie County, WY | 67 km (41 mi) | E | earthquakes near Washakie County |
| Fremont County, WY | 85 km (53 mi) | S | earthquakes near Fremont County |
| Big Horn County, WY | 89 km (55 mi) | NNE | earthquakes near Big Horn County |
| Park County, WY | 116 km (72 mi) | NW | earthquakes near Park County |
| Sublette County, WY | 164 km (102 mi) | SW | earthquakes near Sublette County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
8 earthquakes have been recorded within 50 km since this one.
- 2.6 17 km ESE of Lucerne, Wyoming
- 3.3 Wyoming
- 2.0 Wyoming
- 2.1 5 km WSW of Owl Creek, Wyoming
- 2.9 11 km WSW of Thermopolis, Wyoming
- 2.1 16 km SW of Thermopolis, Wyoming
- 3.0 13 km WSW of Thermopolis, Wyoming
- 2.2 22 km S of Owl Creek, 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.