Light mag. 3.5 earthquake - Custer County, 73 mi northeast of Boise, Ada County, Idaho, USA, on Sunday, 25 Apr 2021 4:23 am (GMT -6) -

Light mag. 3.5 earthquake - Custer County, 73 mi northeast of Boise, Ada County, Idaho, USA, on Sunday, 25 Apr 2021 4:23 am (GMT -6)

Light magnitude 3.5 earthquake at 3 km depth

25 Apr 10:32 UTC: First to report: USGS after 9 minutes.
Update Sun, 25 Apr 2021, 10:36
Small magnitude 3.5 earthquake 2 miles southwest of Stanley, Idaho, United States
3.5 quake 25 Apr 4:23 am (GMT -6)
3.5 quake 25 Apr 4:23 am (GMT -6)
The United States Geological Survey reported a magnitude 3.5 quake in the United States near Stanley, Custer County, Idaho, only 13 minutes ago. The earthquake hit early morning on Sunday 25 April 2021 at 4:23 am local time at a very shallow depth of 2 miles. 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 3.5 as well.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Stanley (pop. 68) located 2 miles from the epicenter, the quake should have been felt as light shaking. In Challis (pop. 1000, 42 miles away), the quake was probably not felt.
Download the Volcanoes & Earthquakes app to get one of the fastest seismic alerts online:
Android | IOS

Earthquake data:

Date & time: 25 Apr 2021 10:23:21 UTC -
Local time at epicenter: Sunday, 25 Apr 2021 4:23 am (GMT -6)
Magnitude: 3.5
Depth: 3.2 km
Epicenter latitude / longitude: 44.2°N / 114.9781°W (Custer, Idaho, United States)
Nearest volcano: Shoshone (124 km / 77 mi)
Nearby towns and cities:
4 km (2 mi) WSW of Stanley (pop: 68) --> See nearby quakes!
68 km (42 mi) WSW of Challis (pop: 1,040) --> See nearby quakes!
76 km (47 mi) NW of Ketchum (pop: 2,730) --> See nearby quakes!
92 km (57 mi) NW of Hailey (Blaine County) (pop: 8,130) --> See nearby quakes!
118 km (73 mi) NE of Boise (pop: 146,000) --> See nearby quakes!
124 km (77 mi) ENE of Eagle (Ada County) (pop: 23,600) --> See nearby quakes!
131 km (81 mi) ENE of Meridian (pop: 90,700) --> See nearby quakes!
140 km (87 mi) NE of Kuna (Ada County) (pop: 17,200) --> See nearby quakes!
147 km (91 mi) ENE of Nampa (pop: 89,800) --> See nearby quakes!
149 km (93 mi) ENE of Hamburg Siding (pop: 51,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.1 x 1010 joules (3.12 megawatt hours, equivalent to 2.68 tons of TNT) More info
Show interactive Map
[smaller] [bigger]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
3.53.2 km3 Km WSW of Stanley, Idaho, USAUSGS

User reports for this quake (11)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
4 km ENE of epicenter [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s : Broke windows. Knocked stuff off walls and shelves | 3 users found this interesting.  
Stanley, Idaho / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : A lot of shaking | One user found this interesting.  
Jerry Hughes, Stanley, ID / Light shaking (MMI IV) / single lateral shake / very short : short shake woke me from sleep | One user found this interesting.  
Greg Stanley Idaho / Moderate shaking (MMI V) / horizontal (sideways) swinging / very short : Quick Side to side little intense. | One user found this interesting.  
Stanley / Light shaking (MMI IV)
Lower Stanley Jerry’s cabin / Light shaking (MMI IV) / single vertical bump / very short
Stanley, ID / Weak shaking (MMI III) / rattling, vibrating / 5-10 s
stanley, id / Moderate shaking (MMI V) / 15-20 s
Stanley, ID / Moderate shaking (MMI V) / simple rolling (tilting sideways along one direction) / 2-5 s
Stanley, Idaho / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Stanley, ID / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version
Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Additional seismic data sources
  • Improved content in English
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.