Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near South Park, WY
No earthquake was likely felt in South Park in the 24 hours to 5:11 pm MST (00:11 UTC). The last one was M 2.7, 17 km (11 mi) SSE, at 6:18 pm MST on 6 November 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near South Park
This page: a magnitude 1.8 earthquake was recorded 3 km (2 mi) east of South Park, WY, at 4:55 am MDT on 11 May 2019 (10:55 UTC), less than 1 km deep.
USGS: 2 km E of South Park, Wyoming
- When
- 4:55 am MDT on 11 May 2019 ()
- Where
- 3 km (2 mi) east of South Park, WY · earthquakes near South Park
- Magnitude
- M 1.8 (ml)
- Depth
- 1.0 km below the surface
- Felt
- no reports yet
- Nearest
- Teton County, 52 km NW
- Nearest mapped fault
- Teton fault, 16 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 2742 days ago
Earthquake alerts for South Park, 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 14 km (9 mi) from the epicentre. In South Park, 3 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.
Likely felt in: Jackson 6 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 900,000× the energy of this one
- Magna, Utah 2020 M 5.7 640,000× the energy of this one
- Around the size people start to feel M 3.0 57× the energy of this one
- This earthquake M 1.8 about 17 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 29,000 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 · 35 km ENE 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 43.4227, -110.7612. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Teton County, ID | 52 km (32 mi) | NW | earthquakes near Teton County |
| Bonneville County, ID | 70 km (43 mi) | W | earthquakes near Bonneville County |
| Teton County, WY | 75 km (46 mi) | NNE | earthquakes near Teton County |
| Madison County, ID | 83 km (51 mi) | WNW | earthquakes near Madison County |
| Caribou County, ID | 95 km (59 mi) | SW | earthquakes near Caribou County |
| Sublette County, WY | 100 km (62 mi) | SE | earthquakes near Sublette County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
57 earthquakes have been recorded within 50 km since this one.
- 1.9 1 km E of Alpine Northeast, Wyoming
- 1.7 southern Idaho
- 1.6 5 km SSW of Alpine, Wyoming
- 1.9 32 km ESE of Kelly, Wyoming
- 1.9 23 km NE of Kelly, Wyoming
- 2.7 6 km S of Alpine, Wyoming
- 2.0 33 km ESE of Kelly, Wyoming
- 1.9 33 km ESE of Kelly, Wyoming
- 1.9 23 km NNE of Bondurant, Wyoming
- 2.2 southern Idaho
- 1.6 6 km NW of Wilson, Wyoming
- 3.6 17 km ESE of Kelly, Wyoming
- 2.1 12 km W of Wilson, Wyoming
- 1.7 10 km SSE of Victor, Idaho
- 1.7 11 km ENE of Alta, 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.