Information on the earthquake: moderate mag. Earthquake 4.1 – 39 mi southeast of Worland, Washakie County, Wyoming, USA, July 4 3:17 p.m. (GMT -6)


Moderate magnitude earthquake 4.1 at 14 km depth

July 4 21:35 UTC: First to report: VolcanoDiscovery after 17 minutes.
Jul 4 21:38: Now using USGS data updates
Jul 5 12:38 AM: Depth of the hypocenter recalculated from 15.4 to 13.5 km (from 9.6 to 8.4 mi). Epicenter location corrected 5.3 km (3.3 mi) NE.
Jul 5, 12:52 AM: Depth of the hypocenter recalculated from 13.5 to 14.4 km (8.4 to 8.9 mi).

Updated Sun Jul 4, 2021, 21:42

Magnitude 4.1 earthquake strikes near Worland, Washakie County, Wyoming, United States

Earthquake 4.1 on July 4, 3:17 p.m. (GMT -6)

Earthquake 4.1 on July 4, 3:17 p.m. (GMT -6)

Magnitude 4.1 earthquake near Worland, Washakie County, Wyoming, United States, was reported just 24 minutes ago by the United States Geological Survey, considered the leading international and national agency which monitors seismic activity in the United States. The earthquake occurred at a shallow depth of 9.6 miles below the epicenter in the early afternoon on Sunday, July 4, 2021 at 3:17 p.m. local time. The exact magnitude, epicenter and depth of the quake could be revised in the coming hours or minutes, as seismologists review the data and refine their calculations, or when other agencies release their report.
Our monitoring service identified a second report from the Euro-Mediterranean Seismological Center (EMSC) which also listed the magnitude 4.1 earthquake.
Cities near the epicenter where the quake could have been felt as very weak tremors include Ten Sleep (pop. 250) located 29 miles from epicenter, Worland (pop. 5,400) 39 miles, Thermopolis (pop. 3000) 41 miles and Buffalo (population 4,600) 61 miles.

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Earthquake data:

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Date and time: July 4, 2021 21:17:42 UTC –
Local time at epicenter: July 4, 3:17 p.m. (GMT -6)
Magnitude: 4.1

Depth: 14.4 km
Latitude / longitude of epicenter: 43.6581 ° N / 107.3603 ° W (Washakie, Wyoming, United States)

Nearby towns and villages:
42 km (26 mi) south of Ten Sleep (pop: 254) -> See nearby earthquakes!
62 km (39 mi) southeast of Netherlands (pop: 5,370) -> Observe the earthquakes nearby!
69 km (43 mi) east of Thermopolis (pop: 2,970) -> See nearby earthquakes!
93 km (58 mi) southwest of Buffalo (pop: 4,630) -> Watch the earthquakes nearby!
122 km (76 mi) northwest of Casper (pop: 60,300) -> Observe the earthquakes nearby!
131 km (81 mi) SSO of Sheridan (pop: 17,900) -> Observe the earthquakes nearby!
165 km (102 mi) OSO of Gillette (pop: 32,600) -> See nearby earthquakes!
253 km (157 mi) to SSE of Billing (Montana) (pop: 110,300) -> Observe the earthquakes nearby!
349 km (217 mi) northwest of Cheyenne (pop: 63,300) -> Observe the earthquakes nearby!
390 km (242 mi) NNW of Fort Collins, Colorado (pop: 161,200) -> Observe the earthquakes nearby!

Weather at the epicenter at the time of the earthquake:
Scattered clouds 34.9 ° C (95 F), humidity: 18%, wind: 3 m / s (5 kts) from S

Main data source: USGS (United States Geological Survey)

Estimated energy released: 8.9 x 10ten joules (24.8 megawatt hours, equivalent to 21.3 tonnes of TNT) Find out more

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Data for the same earthquake reported by different agencies

Info: The more agencies report the same earthquake and publish similar data, the more confidence you can have in the data. It normally takes up to a few hours for the seismic parameters to be calculated with near optimum accuracy.

User reports for this earthquake (6)

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Willard springs / Slight shaking (MMI IV) / vibration and rolling / 5-10 s : It sounded like booming thunder and felt the ground shake for several seconds. We heard it before we felt it | 4 users found this interesting.

Worland, Wyoming / Weak shaking (MMI III) / rattling, vibrations / very short

Basin (97.3 km NW of epicenter) [Map] / Weak shaking (MMI III) / horizontal oscillation (sideways) / 5-10 s

Gillette (162.6 km ENE of epicenter) [Map] / not felt (reported by our application)

Rally, Montana / not felt

THERMOPOLIS (69.7 km west of epicenter) [Map] / Weak shaking (MMI III) / horizontal oscillation (sideways) / 2-5 s

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