Get our newsletter!
Check out our volcano tours on VolcanoAdventures.com!
Volcanoes & Earthquakes - new app for Android
Our New Book
Volcano Discoveries: "One of the most eye-catching guides to the world’s volcanoes ever published.
Volcano Tours
Our expert volcanologists and photographers offer unique travel experiences: volcano expeditions, photo tours, and relaxed walking & study tours.
Guaranteed tours
10-18 Oct 2020: From Stromboli to Etna - Sicila and Eolian Islands (Italy)
7-16 Dec 2020: Magic Minutes: Chile Solar Eclipse 2020 - Chile
: spaces available / : guaranteed / : few spaces left / : booked out
Interactive map of latest earthquakes and active volcanoes in the world

Great mag. 8.7 earthquake - Rat Islands, Aleutian Islands, Alaska (USA) on Thursday, 4 February 1965

Great mag. 8.7 earthquake - Rat Islands, Aleutian Islands, Alaska (USA) on Thursday, 4 February 1965
1 Jan 00:00 UTC: First to report: USGS after 5 years.
Date & time: Thursday, 4 February 1965 05:01 UTC
Magnitude: 8.7
Depth: 30.3 km
Epicenter latitude / longitude: 51.251°N / 178.715°E (Alaska, United States)
Nearest volcano: Little Sitkin (79 km / 49 mi)
Primary data source: USGS
Estimated released energy: 7.1 x 1017 joules (2 x 105 gigawatt hours, equivalent to 1.7 x 108 tons of TNT or 10575.2 atomic bombs!) [learn more]
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.
TimeMag. / DepthLocationSource
Thu, 1 Jan 00:00 UTCM
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (modified Mercalli) scale.
to top
to top

Aftershocks of the 8.7 quake: Rat Islands, Aleutian Islands, Alaska (USA), 4 Feb 1965 05h01

Show info about this
List of recorded aftershocks, latest first (121 quakes):

Map of aftershocks

to top

Significant earthquakes in the same area since 1900

Great mag. 8.7 earthquake - Rat Islands, Aleutian Islands, Alaska (USA) on Thursday, 4 February 1965
Go to: Most recent quakes | Top 20 quakes past 24 hrs
to top
 

More on VolcanoDiscovery

Volcanic Quakes
Earthquakes near Volcanoes: Our world-wide map continuously detects shallow earthquakes near volcanoes. These could be early signs of unrest and often precede eruptions.
Vulkane Italiens
Vulkane Italiens - order online: 88 pages, brilliant color photos, German language - this beautifully illustrated guidebook is a perfect introduction and companion for all interested in Italy's rich and varied volcanic areas.
Geology dictionary
Glossary of geologic terms: A growing list of often illustrated explanations and definitions of geological terms and keywords, with focus on volcanology and seismology.
Bárdarbunga Live
Live webcams of Bardarbunga volcano: Watch live webcam image, seismic and other real-time data in real time. If the large Icelandic volcanic erupts, you could follow the activity here.
 
Why is there advertising on this site?

Support us!


Maintaining the website and our free apps is a time- and cost-intensive effort.
If you find the information useful and would like to support our team to develop further features and get the upgraded ad-free version, consider making a donation (PayPal or Online cc payment).
Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
Thanks to your past donations, these features have been added recently:
  • Earthquake archive back to 1900
  • Additional 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.