Intense earthquake swarm offshore North Iceland - 1 000 quakes in 6 days

Intense earthquake swarm offshore North Iceland - 1 000 quakes in 6 days

Support us AD-FREE

Producing content you read on this website takes a lot of time, effort, and hard work. If you value what we do here, please consider subscribing today.

SUBSCRIBE TODAY

An intense earthquake swarm has been going on offshore North Iceland, 10 km NW of Gjögurtá, since September 25, 2013. This morning, 2 earthquakes reaching magnitude 3 and 3.2 occurred at 06:14 and 07:41 UTC. Roughly 1 000 earthquakes have been recorded by Icelandic Meteorological Office in last 6 days (IMO).

The depths of the quakes vary from about 15 km depth (crust-mantle boundary) to near surface. The area is located on an active fault line related to rifting, and a possible cause of the earthquake swarm could be a magmatic intrusion at Tjörnes Fracture Zone volcano (VD).

University of Iceland © Icelandic Meteorological Office

Image above: Map of relative locations, September 25 to October 1, 2013 offshore North Iceland. Roughly 1000 earthquakes have been recorded in the swarm. Topography of seabed: Bryndís Brandsdóttir, Institute of Earth Sciences, University of Iceland.

Location of recent quakes with relation to Tjörnes Fracture Zone volcano. Image credit: Google Earth/Volcano Discovery

Iceland earthquake swarm map - October 1, 2013. Image credit: IMO

The offshore Tjörnes Fracture Zone is an oblique transform zone that separates the northern volcanic zone of Iceland from the Kolbeinsey Ridge, part of the Mid-Atlantic Ridge north of Iceland. A submarine eruption was reported during 1867-1868 at the SE part of the fissure system off the northern coast of Iceland along the Manareyjar Ridge immediately north of Manareyjar Island (GVP).

Featured image: Iceland earthquake swarm map - October 1, 2013. Image credit: IMO

Register/become a supporter

Support us AD-FREE

Your support is crucial for our survival. It makes this project fully self-sustainable and keeps us independent and focused on the content we love to create and share. 

Monthly subscription

Subscription options

Yearly subscription

Subscription options

You'll receive your ad-free account for 20x faster browsing experience, clean interface without any distractions, ability to post comments without prior editorial check, all our desktop and mobile applications (current and upcoming) ad-free and with the full set of features available, a direct line of communication and much more. See all options.

Tags: iceland

Comments

No comments yet. Why don't you post the first comment?

Post a comment

Your name: *

Your email address: *

Comment text: *

The image that appears on your comment is your Gravatar