Contact | RSS | EN | DE | EL | ES | FR | IT | RU

Fagradalsfjall volcano (Reykjanes Peninsula, Iceland): 3rd eruptive fissure opened yesterday

Thu, 8 Apr 2021, 08:37
08:37 AM | BY: MK
Aerial view of the all eruption sites (image: IMO)
Aerial view of the all eruption sites (image: IMO)
The new lava flow after opening the 3rd eruptive fissure vent (image: webcam)
The new lava flow after opening the 3rd eruptive fissure vent (image: webcam)
The IMO's map shows the layout of the three eruption sites with estimated thickness and distances reached by the lava flow fields (image: IMO)
The IMO's map shows the layout of the three eruption sites with estimated thickness and distances reached by the lava flow fields (image: IMO)
A third eruptive fissure opened yesterday at midnight. Located between the first and second eruption site, the new fissure vent started to erupt basaltic lava flows traveling mostly into the Geldingadalir valley, but also into the Meradalir valley where a new lava flow field is growing.
Most lava is directed into a main channel at an estimated discharge rate of about 7 cubic m/s, which indicates very low viscosity. For comparison, the effusion rate from the growing cones around the first eruption site had been estimated to be about 5.5 cubic m/s.
Basalt lavas with this property are fast, thin, and spread extensively into sheet-like flow fields with aspect ratios between thickness and covered area of less than 1%.
The lava flow in the main channel is bounded by levées, natural banks that form at the sides of the flow, visible in the attached video below.
The Icelandic Met Office (IMO) estimates that approx. 265 million cubic feet (7,5 million cubic meters) of the lava have so far erupted from all vents. A useful map published by the IMO shows the layout of the three eruption sites with estimated thickness and distances reached by the lava flow fields.
Judging from the webcam live imagery, there is near-constant lava spattering from the fissure vents, which have been building steep-sided cones above the eruption points on the fissures (also called hornitos).

The main lava channel with levées at the sides of the flow:

Previous news

Mon, 5 Apr 2021, 22:11

New eruptive fissure opens 1 km northeast of current eruption site

The new eruptive fissure that opened today in Iceland (image: Almannavarnir / facebook)
A new eruptive fissure opened today approx. 1 km northeast of the so-far active eruption site. The seismic network detected at 11:37 local time a sharp peak in tremor at 1 km depth, which announced its formation shortly after as magma broke through the surface along a new section further upslope on top of the active magma intrusion underneath. ... Read all
Fri, 2 Apr 2021, 09:51

Fagradalsfjall volcano update: Eruption goes on, filling Geldingadalir valley

View of the eruption in Iceland this morning (image: RUV webcam)
The eruption in Geldingadalir, now soon two weeks old, shows no signs of weakening. Activity has been building a slowly growing cone around the two active vents in the center, which undergoes constant modifications by accumulating spatter and smaller and larger collapses. ... Read all
Show more
Fissure swarm 385 m / 1263 ft
Reykjanes Peninsula, Iceland, 63.89°N / -22.27°W
Current status: normal or dormant (1 out of 5) Fagradalsfjall volcano eruptions:
2022 (Aug), 2021
Less than few million years ago (Pleistocene)
Typical eruption style
fissure eruptions, lava flows
Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

More on VolcanoDiscovery

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:
  • Design upgrade
  • 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!
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Volcanoes | Earthquakes | Photos | Volcano News | App
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours
Tours & Dates | FAQ | About us
Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 310 395 322 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings