Earthquake · reviewed by a seismologist
M 1.5ml
Earthquake near Hoback, WY
No earthquake was likely felt in Hoback in the 24 hours to 1:24 pm MST (20:24 UTC). The last one was M 2.7, 5 km (3 mi) E, at 6:18 pm MST on 6 November 2026, estimated intensity III (weak) in town; 1 felt report to USGS. Every earthquake near Hoback
This page: a magnitude 1.5 earthquake was recorded 15 km (9 mi) east-northeast of Hoback, WY, at 2:54 am MDT on 20 April 2017 (08:54 UTC), 4.6 km deep.
USGS: 15 km ENE of Hoback, Wyoming
- When
- 2:54 am MDT on 20 April 2017 ()
- Where
- 15 km (9 mi) east-northeast of Hoback, WY · earthquakes near Hoback
- Magnitude
- M 1.5 (ml)
- Depth
- 4.6 km below the surface
- Felt
- no reports yet
- Nearest
- Teton County, 65 km NW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3492 days ago
Earthquake alerts for Hoback, 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 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 9 km (6 mi) from the epicentre. In Hoback, 15 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.
Earthquakes near other towns within 30 km: South Park, Rafter J Ranch, Jackson, Wilson, Moose Wilson Road.
How big was it?
This earthquake released about 5.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,600,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
- Around the size people start to feel M 3.0 170× the energy of this one
- This earthquake M 1.5 about 5.7 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 4.8 on 2016-08-27 — about 83,000 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.0 20 km ESE of Kelly, Wyoming · 31 km NE 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 43.3558, -110.6247. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Teton County, ID | 65 km (41 mi) | NW | earthquakes near Teton County |
| Teton County, WY | 79 km (49 mi) | NNE | earthquakes near Teton County |
| Bonneville County, ID | 81 km (50 mi) | W | earthquakes near Bonneville County |
| Sublette County, WY | 87 km (54 mi) | SE | earthquakes near Sublette County |
| Madison County, ID | 96 km (60 mi) | WNW | earthquakes near Madison County |
| Caribou County, ID | 98 km (61 mi) | SW | earthquakes near Caribou County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
55 earthquakes have been recorded within 50 km since this one.
- 1.6 16 km N of Alpine Northeast, Wyoming
- 2.1 16 km N of Alpine Northeast, Wyoming
- 1.5 17 km N of Alpine Northeast, Wyoming
- 2.2 16 km N of Alpine Northeast, Wyoming
- 1.5 16 km WSW of Rafter J Ranch, Wyoming
- 2.3 16 km N of Alpine Northeast, Wyoming
- 1.8 17 km N of Alpine Northeast, Wyoming
- 1.5 18 km N of Alpine Northeast, Wyoming
- 1.6 17 km WSW of Rafter J Ranch, Wyoming
- 1.6 17 km N of Alpine Northeast, Wyoming
- 1.6 17 km N of Alpine Northeast, Wyoming
- 1.5 18 km N of Alpine Northeast, Wyoming
- 2.3 16 km N of Alpine Northeast, Wyoming
- 1.8 18 km N of Alpine Northeast, Wyoming
- 1.7 16 km NW of Alpine Northeast, 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.