· ·

Aviation Color Code for Krysuvik volcano raised to Yellow, Iceland

krysuvik

The Icelandic Meteorological Office (IMO) has raised the Aviation Color Code for Krysuvik volcano to Yellow on February 24, 2021, due to increased seismicity near the volcano. The last eruption at this volcano took place in the year 1340.

Intense seismic activity had been detected over the previous few days and since midnight UTC on February 24 through 11:07 UTC, more than 500 earthquakes had been recorded.

At 10:05 UTC, M5.7 earthquake occurred 5 km (3.1 miles) W of Krýsuvík followed by M4.2 at 10:27 UTC less than 1 km (0.62 miles) NW of Krýsuvík.

The seismic unrest was unusual for the area in the context of the unrest in the Reykjanes peninsula that began in January 2020.

The Krýsuvík-Trölladyngja volcanic system on the Reykjanes Volcanic Zone has been moderately active in the Holocene — last 8 000 years. The last eruptive episode, consisting of two eruptions separated by 37 years, occurred in the 12th century with the lava flows reaching the sea on the north and south coast of the peninsula.

The NE-SW trending volcanic system comprises a 50 km (31 miles) long, composite fissure swarm without a developed central volcano. Maximum elevation is ~400 m (1 300 feet) a.s.l. The system has no ice cover but a large lake lies within the system.

The characteristic activity is effusive basaltic eruptions producing lava flows covering some tens of km2 and minor tephra deposits. Eruption frequency during the last 3 000 years is 1 eruption per 750 years.

The largest known eruption in Krýsuvík – Trölladyngja volcanic system is the formation of a shield volcano of a few km3 in volume. Two such eruptions have occurred in the last 14 000 years.

An eruption such as that one is considered unlikely at present time.

Geological summary

The Krysuvík volcanic system (also spelled Krisuvik) consists of a group of NE-SW-trending basaltic crater rows and small shield volcanoes cutting the central Reykjanes Peninsula west of Kleifarvatn lake.

Several eruptions have taken place since the settlement of Iceland, including the eruption of a large lava flow from the Ogmundargigar crater row around the 12th century.

The latest eruption took place during the 14th century.

Featured image credit: Copernicus EU/Sentinel-2, TW. Acquired: February 10, 2021

If you value what we do here, create your ad-free account and support our journalism.

Share:

Related articles



Your support makes a difference

Dear valued reader,

We hope that our website has been a valuable resource for you.

The reality is that it takes a lot of time, effort, and resources to maintain and grow this website. We rely on the support of readers like you to keep providing high-quality content.

If you have found our website to be helpful, please consider making a contribution to help us continue to bring you the information you need. Your support means the world to us and helps us to keep doing what we love.

Support us by choosing your support level – Silver, Gold or Platinum. Other support options include Patreon pledges and sending us a one-off payment using PayPal.

Thank you for your consideration. Your support is greatly appreciated.

Sincerely,
Teo Blašković

$5 /month

  • Ad-free account
  • Clean user interface and fast browsing
  • Direct communication with us via chat and email
  • Suggest new features, content and applications
  • Early access to new apps and features

$50 /year

$10 /month

  • Ad-free account
  • Clean user interface and fast browsing
  • Direct communication with us via chat and email
  • Suggest new features, content and applications
  • Early access to new apps and features

$100 /year

$25 /month

  • Ad-free account
  • Clean user interface and fast browsing
  • Direct communication with us via chat and email
  • Suggest new features, content and applications
  • Early access to new apps and features

$200 /year

You can also support us on Patreon

support us on patreon

or by sending us a one-off payment using PayPal:


Commenting rules and guidelines

We value the thoughts and opinions of our readers and welcome healthy discussions on our website. In order to maintain a respectful and positive community, we ask that all commenters follow these rules:

  • Treat others with kindness and respect.
  • Stay on topic and contribute to the conversation in a meaningful way.
  • Do not use abusive or hateful language.
  • Do not spam or promote unrelated products or services.
  • Do not post any personal information or content that is illegal, obscene, or otherwise inappropriate.

We reserve the right to remove any comments that violate these rules. By commenting on our website, you agree to abide by these guidelines. Thank you for helping to create a positive and welcoming environment for all.

Leave a reply

Your email address will not be published. Required fields are marked *