Earthquake near Star Valley Ranch, WY

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 18 km (11 mi) from the epicentre. In Star Valley Ranch, 11 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: Star Valley Ranch 11 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 82 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
3. Around the size people start to feel M 3.0 12× the energy of this one
4. This earthquake M 2.3 about 82 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 5.3 on 2017-09-02 — about 33,000 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

1. 5.8 4 km SSE of Auburn, Wyoming · 16 km SSE of this epicentre Feb 3, 1994
2. 5.3 Southeastern Idaho · 23 km WNW of this epicentre Dec 12, 1917
3. 5.3 29 km WSW of Freedom, Idaho · 28 km W of this epicentre Apr 21, 2001

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 42.8985, -111.0540. Map © OpenStreetMap contributors.

Nearby places

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

49 earthquakes have been recorded within 50 km since this one.

1. 2.7 5 km E of Hoback, Wyoming 01:18 UTC
2. 2.2 18 km NE of Georgetown, Idaho 10:12 UTC
3. 1.8 11 km E of Georgetown, Idaho 03:57 UTC
4. 2.1 15 km E of Soda Springs, Idaho 16:47 UTC
5. 2.2 1 km E of Alpine Northeast, Wyoming 06:08 UTC
6. 2.9 23 km WNW of Auburn, Wyoming 09:17 UTC
7. 1.9 11 km NW of Georgetown, Idaho 08:07 UTC
8. 2.4 17 km WSW of Auburn, Wyoming 12:09 UTC
9. 2.7 26 km NE of Soda Springs, Idaho 06:45 UTC
10. 1.9 13 km WSW of Fairview, Wyoming 08:06 UTC
11. 2.3 10 km SW of Auburn, Wyoming 21:44 UTC
12. 2.5 18 km W of Fairview, Wyoming 18:47 UTC
13. 3.6 13 km W of Fairview, Wyoming 15:01 UTC
14. 1.8 19 km SW of Freedom, Idaho 22:02 UTC
15. 2.2 11 km ESE of Soda Springs, Idaho 02:27 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 13:34 UTC. 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.