Earthquake · reviewed by a seismologist
M 3.0ml
Earthquake near Thermopolis, WY
No earthquake was likely felt in Thermopolis in the 24 hours to 9:09 am MST (16:09 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 3.0 earthquake was recorded 14 km (8 mi) west-southwest of Thermopolis, WY, at 3:58 pm MDT on 1 July 2018 (21:58 UTC), 5.0 km deep. 1 person has reported feeling it to USGS.
USGS: 13 km WSW of Thermopolis, Wyoming
- When
- 3:58 pm MDT on 1 July 2018 ()
- Where
- 14 km (8 mi) west-southwest of Thermopolis, WY · earthquakes near Thermopolis
- Magnitude
- M 3.0 (ml)
- Depth
- 5.0 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Hot Springs County, 13 km NNW
- Nearest mapped fault
- Stagner Creek fault, 19 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 2973 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 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 36 km (22 mi) from the epicentre. In Thermopolis, 14 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: Thermopolis 14 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 350,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
- Magna, Utah 2020 M 5.7 11,000× the energy of this one
- This earthquake M 3.0 about 950 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 43.6125, -108.3740. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Hot Springs County, WY | 13 km (8 mi) | NNW | earthquakes near Hot Springs County |
| Washakie County, WY | 64 km (40 mi) | ENE | earthquakes near Washakie County |
| Fremont County, WY | 65 km (40 mi) | SSW | earthquakes near Fremont County |
| Big Horn County, WY | 106 km (66 mi) | NNE | earthquakes near Big Horn County |
| Park County, WY | 138 km (86 mi) | NW | earthquakes near Park County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 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
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.