Moderate mag. 3.8 earthquake - North Pacific Ocean, 141 mi east of Unalaska, Aleutians West (CA), Alaska, USA, on Thursday, 27 October 2016 at 15:55 (GMT)

This quake was likely an aftershock of the 5.9 quake North Pacific Ocean, 133 mi east of Unalaska, Aleutians West (CA), Alaska, USA, 27 October 2016 11:53 GMT, which had occurred 4 hours earlier.
Moderate mag. 3.8 earthquake - North Pacific Ocean, 141 mi east of Unalaska, Aleutians West (CA), Alaska, USA, on Thursday, 27 October 2016 at 15:55 (GMT)

Moderate magnitude 3.8 earthquake at 9 km depth

27 Oct 17:20 UTC: First to report: EMSC after 1 hour and 25 minutes.
Oct 27 20:24: Magnitude recalculated from 3.5 to 3.6.
Hypocenter depth recalculated from 20.0 to 10.0 km.
Oct 27 20:40: Magnitude recalculated from 3.6 to 3.8.
Hypocenter depth recalculated from 10.0 to 9.0 km.
Date & time: 27 Oct 2016 15:55:09 UTC
Magnitude: 3.8
Depth: 9.0 km
Epicenter latitude / longitude: 53.44°N / 163.16°W (North Pacific Ocean, United States)
Nearest volcano: Isanotski (143 km / 89 mi)
Nearby towns and cities:
158 km (98 mi) S of False Pass (pop: 40) --> See nearby quakes!
188 km (117 mi) SSW of King Cove (pop: 1,010) --> See nearby quakes!
188 km (117 mi) ESE of Akutan (pop: 1,040) --> See nearby quakes!
196 km (122 mi) S of Cold Bay (pop: 123) --> See nearby quakes!
228 km (141 mi) E of Unalaska (pop: 4,490) --> See nearby quakes!
272 km (169 mi) SW of Sand Point (pop: 1,060) --> See nearby quakes!
311 km (193 mi) SSW of Nelson Lagoon (pop: 52) --> See nearby quakes!
377 km (234 mi) SW of Perryville (pop: 113) --> See nearby quakes!
421 km (262 mi) SW of Chignik Lake (pop: 73) --> See nearby quakes!
435 km (270 mi) SW of Chignik Lagoon (pop: 78) --> See nearby quakes!
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 3.2 x 1010 joules (8.78 megawatt hours, equivalent to 7.56 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.
MagnitudeDepthLocationSource
3.89 kmUNIMAK ISLAND REGION, ALASKAEMSC
3.813 km- 158km S of False Pass, 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 yet. If you felt it be the first to report it!
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area

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.