Mag. 4.9 earthquake - 56 mi southeast of Sand Point, Aleutians East County, Alaska, on 20 Oct 1:38 pm (GMT -8) -

This quake was likely an aftershock of the 7.6 quake Gulf of Alaska, 60 mi southeast of Sand Point, Aleutians East County, Alaska, USA, 19 Oct 2020 11:54 am (GMT -9), which had occurred 1 day 1 hours earlier.
Mag. 4.9 earthquake  - 56 mi southeast of Sand Point, Aleutians East County, Alaska, on 20 Oct 1:38 pm (GMT -8)

Light magnitude 4.9 earthquake at 34 km depth

20 Oct 21:50 UTC: First to report: GFZ after 11 minutes.
20 Oct 21:55: Now using data updates from USGS
Date & time: 20 Oct 2020 21:38:52 UTC -
Local time at epicenter: 20 Oct 1:38 pm (GMT -8)
Magnitude: 4.9
Depth: 33.7 km
Epicenter latitude / longitude: 54.6325°N / 159.8159°W (Gulf of Alaska, United States)
Nearest volcano: Dana (135 km / 84 mi)
Nearby towns and cities:
90 km (56 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
148 km (92 mi) SSW of Perryville (pop: 113) --> See nearby quakes!
167 km (104 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
176 km (109 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
192 km (120 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
196 km (122 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
205 km (127 mi) SSW of Chignik (pop: 87) --> See nearby quakes!
390 km (242 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
6156 km (3825 mi) NW of Washington DC (pop: 601,700) --> See nearby quakes!
6156 km (3825 mi) NW of Washington DC (pop: 601,700) --> See nearby quakes!
24 km (15 mi) SW of Chernabura Island --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds 7.2°C (45 F), humidity: 64%, wind: 5 m/s (9 kts) from ENE
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1012 joules (392 megawatt hours, equivalent to 338 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
M 4.934 km89 Km SSE of Sand Point, Alaska, USAUSGS
M 4.940 kmSouth Of Alaska, USAEMSC
M 5.030 kmSouth of Alaska, USAGeoAu
M 4.881 kmAlaska Peninsula, USAGFZ

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 since 1900

Mag. 4.9 earthquake - 56 mi southeast of Sand Point, Aleutians East County, Alaska, on 20 Oct 1:38 pm (GMT -8)

Map of earlier quakes

Volcanoes & Earthquakes - new app for Android
Why is there advertising on this site?

Support us - Help us upgrade our server!

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.
Our server is reaching its limits and we need financing to increase capacity in order to deal with huge activity peaks when quakes occur. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every penny counts and every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features and in upgrading our software, please make a donation (PayPal or Online cc 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! With best regards from the VolcanoDiscovery team.
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.