Small tremor of magnitude 3.8 just reported 30 miles southwest of Garden City, Idaho, United States
3.8 quake 19 Sep 10:41 pm (GMT -6)

An earthquake of magnitude 3.8 occurred late at night on Sunday, September 19th, 2021, at 10:41 pm local time near Garden City, Custer County, Idaho, USA, as reported by the United States Geological Survey.
According to preliminary data, the quake was located at a shallow depth of 6.2 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.8 as well.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Stanley (pop. 68) located 11 miles from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Garden City (pop. 1000) located 30 miles from the epicenter, and Challis (pop. 1000) 30 miles away. In Ketchum (pop. 2,700, 51 miles away), the quake was probably not felt.


Earthquake data:
Date & time: Sep 19, 2021 10:41 pm (GMT -6) local time (20 Sep 2021 04:41 GMT)
Magnitude: 3.8
Depth: 10.0 km
Epicenterlatitude / longitude: 44.35°N / 114.79°W (Custer, Idaho, United States)
Primary data source: USGS
https://www.volcanodiscovery.com/earthquake/news/141898/Small-tremor-of-magnitude-38-just-reported-30-miles-southwest-of-Garden-City-Idaho-United-States.html