Earthquake · reviewed by a seismologist
M 2.6ml
28 km SSE of Ten Sleep, Wyoming
Yes. A magnitude 2.6 earthquake was recorded 28 km SSE of Ten Sleep, Wyoming, at 7:33 am MDT on 14 October 2021 (13:33 UTC), 14 km deep.
- When
- Magnitude
- M 2.6 (ml)
- Depth
- 14 km below the surface
- Felt
- no reports yet
- Nearest
- Washakie County, 30 km WNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1789 days ago
Earthquake alerts for Worland, WY
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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 19 km (12 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 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
- Magna, Utah 2020 M 5.7 45,000× the energy of this one
- Around the size people start to feel M 3.0 4× the energy of this one
- This earthquake M 2.6 about 240 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
The largest earthquake within 50 km since 2016 was M 4.0 on 2017-11-03 — about 130 times the energy of this one.
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 43.7964, -107.3170. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Washakie County, WY | 30 km (18 mi) | WNW | earthquakes near Washakie County |
| Johnson County, WY | 65 km (40 mi) | ENE | earthquakes near Johnson County |
| Hot Springs County, WY | 90 km (56 mi) | W | earthquakes near Hot Springs County |
| Big Horn County, WY | 97 km (61 mi) | NNW | earthquakes near Big Horn County |
| Natrona County, WY | 101 km (63 mi) | SSE | earthquakes near Natrona County |
| Sheridan County, WY | 115 km (71 mi) | NNE | earthquakes near Sheridan County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
4 earthquakes have been recorded within 50 km since this one.
- 2.6 10 km SSE of Ten Sleep, Wyoming
- 3.3 32 km NW of Kaycee, Wyoming
- 3.7 Wyoming
- 2.3 56 km ESE of East 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.