Light mag. 4.2 earthquake - Gulf of Alaska, 52 mi southeast of Sandpoint, Aleutians East, Alaska, USA, on Wednesday, Nov 17, 2021 6:20 pm (GMT -9) -

This quake was likely an aftershock of the 8.2 quake Chignik Earthquake, Gulf of Alaska, July, 29 2021 06:15 GMT, which had occurred 16 weeks earlier.
Light mag. 4.2 earthquake - Gulf of Alaska, 52 mi southeast of Sandpoint, Aleutians East, Alaska, USA, on Wednesday, Nov 17, 2021 6:20 pm (GMT -9)

Light magnitude 4.2 earthquake at 29 km depth

18 Nov 03:39 UTC: First to report: EMSC after 18 minutes.
18 Nov 03:39: Now using data updates from USGS
Date & time: Nov 18, 2021 03:20:48 UTC -
Local time at epicenter: Wednesday, Nov 17, 2021 6:20 pm (GMT -9)
Magnitude: 4.2
Depth: 28.5 km
Epicenter latitude / longitude: 54.7453°N / 159.6702°W (Gulf of Alaska, Alaska, United States)
Antipode: 54.745°S / 20.33°E
Nearest volcano: Stepovak Bay 2 (132 km / 82 mi)
Nearby towns and cities:
84 km (52 mi) SE of Sandpoint (pop: 1,060) --> See nearby quakes!
134 km (83 mi) SSW of Perryville (pop: 113) --> See nearby quakes!
170 km (106 mi) SE of Nelson Lagoon (pop: 52) --> See nearby quakes!
173 km (107 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
177 km (110 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
188 km (117 mi) SSW of Chignik Lagoon (pop: 78) --> See nearby quakes!
201 km (125 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
240 km (149 mi) E of False Pass (pop: 40) --> See nearby quakes!
253 km (157 mi) SSW of Port Heiden (pop: 98) --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds 1.4°C (34 F), humidity: 57%, wind: 6 m/s (12 kts) from NNW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 tons of TNT) | about seismic energy
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!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic 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.
4.229 km84 Km SE of Sand Point, AlaskaUSGS

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
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:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic data sources
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.