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The LEO Network is a worldwide network of observers and experts that share their observations of environmental change.
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Observations

Red aurora over Selfoss
A vivid red aurora was photographed over Selfoss around 2 a.m., a rare display caused by oxygen emissions high in the atmosphere. Photos also showed green fringes, with purple and pink hues possible when nitrogen is involved.
Selfoss, Southern Region, Iceland
Morgunblaðið (mbl.is)

20°C below zero: Likely the coldest ever on this date
Iceland experienced intense cold overnight, with -19.8°C recorded at Sandskeið around 6 a.m., and meteorologist Einar Sveinbjörnsson says it is likely the coldest 30 October on record. Reykjavík dropped to just over -8°C, and an Icelandic Met Office table showed -20.2°C at Setur south of Hofsjökull overnight.
Sandskeið, Southern Region, Iceland
mbl.is

Mosquito has arrived in Iceland
A mosquito species, Culiseta annulata, has been confirmed in Iceland after specimens of both sexes were captured in Kjósarhreppur on October 16–18, 2025. The find suggests mosquitoes may now be present in the country, long considered free of them.
Kjósarhreppur, Capital Region, Iceland
Vísir

Larger than the largest quakes in the biggest swarm
A magnitude 3.3 earthquake struck near Grjótárvatn on Mýrar this morning, the largest in the Ljósufjöll volcanic system in about three and a half months. Roughly 45 quakes have occurred since last night at 15–20 km depth, and the Icelandic Met Office notes concern would rise if activity shallows.
Mýrar, Vesturland, Iceland
mbl.is

Glacier retreated about 200 meters
Vestari Hagafellsjökull, on the south side of Langjökull, has retreated about 200 meters since 2023, according to a preliminary glacier-terminus survey conducted on 20 September 2025. Since 2009 the glacier has receded roughly 973 meters through 2023, with accelerated retreat likely tied to this summer’s warmth.
Langjökull, Southern Region, Iceland
mbl.is

Farmed Salmon Caught in Iceland’s Blanda River
An angler caught a farmed Atlantic salmon in the Blanda River, North Iceland, renewing concerns about escapes and hybridization with wild stocks. Local monitors report over 7% hybrids among juveniles in a key fishing zone following earlier sea-pen damage.
Blanda River, Northwestern Region, Iceland
Iceland Review

Seven salmon confirmed as farmed escapees
Icelandic authorities report that 7 of 22 salmon submitted for testing were confirmed as farmed escapees, caught in several North/West Iceland rivers. Tracing suggests six fish share a common origin in Dýrafjörður; investigations continue and anglers are asked to turn in suspect fish whole for analysis.
Búðardalur, Western Region, Iceland

Road under water: Dozens of tourists assisted
Rescue teams assisted dozens of travelers in the Fjallabak/Landmannalaugar highlands as heavy rain and high water submerged roads. Advisories to avoid the area appear to have worked, with few vehicles present and all travelers getting through safely.
Landmannalaugar, Southern Region, Iceland

Iceland on Alert as Glacial Waters Surge from Langjökull
A sudden glacial outburst flood from a marginal lake near Langjökull sent water into the Svartá and downstream into the Hvítá in Borgarfjörður, peaking above 400 cm overnight before easing to just over 300 cm. Authorities warn further river flooding is possible in coming days, with increased landslide risk in southeast Iceland.
Húsafell, Borgarfjörður, Iceland
Iceland Review

Earthquake near Langjökull: “This is the largest since 2007”
A magnitude 3.3 earthquake struck northeast of Langjökull near Djöflasandur this morning, marking the strongest quake in the area since November 2007.
Langjökull, Iceland
Vísir

Three caravans destroyed by wind on Holtavörðuheiði
Severe winds on the Holtavörðuheiði pass in Húnaþing Vestra, Iceland, blew apart three caravans, prompting a multi-hour rescue response by the Húnar Hvammstanga search and rescue team.
Holtavörðuheiði, Húnaþing Vestra, Iceland
Vísir

Counted a hundred farmed salmon in the lower part of Haukadalsá
An inspector from the Icelandic Fisheries Agency counted around 100 farmed salmon in the lower section of Haukadalsá, marking the largest occurrence of escaped farmed salmon in an Icelandic river, and plans are underway for removal operations including using anglers and Norwegian divers.
Haukadalsá, Dalabyggð, Iceland
visir.is

Bridge Collapses in Borgarfjörður Due to Flooding
A temporary bridge in Borgarfjörður, Iceland, collapsed after an ice jam in the Hvítá River caused significant flooding.
Borgarfjörður, West Iceland, Iceland
Iceland Review

Four earthquakes off Iceland's northern coast
We've become very used to seismic activity in Iceland's southwest corner, but last night, four earthquakes above magnitude three hit a very different area - the Kolbeinsey ridge, far off the country's northern coast.
Iceland
RÚV

Melting glaciers increase supply of electrical power in Iceland
Melting glaciers in Iceland are contributing to an increased supply of electrical power. In the past ten years, the additional supply has amounted to one medium-sized power plant.
Iceland
RÚV

Rare thunder and lightning over Mosfellsbær
Stormy conditions in the southwestern and western parts of the country saw residents experiencing thunder and lightning yesterday. Eysteinn Örn Stefánsson captured a video of lightning that struck Mosfellsbær, which can be seen in the player above.
Mosfellsbær, Capital Region, Iceland
RÚV

Possible wildfire-related fog in northern regions
A fog-like mist in northern Iceland may be connected to forest fires in Canada, with meteorologists suspecting that diluted smoke from the fires has reached the country due to prevailing winds blowing from west to east.
Iceland

Scrapie Diagnosed in Northwest Iceland
The degenerative and fatal disease scrapie has been diagnosed in sheep at Bergsstaðir farm in Northwest Iceland. It is the first time the disease has been detected in the region, which will have an impact not just on Bergsstaðir but the entire district.

Good, though late, berry picking season
The berry picking promises to be good all over Iceland this year, even though it is starting late, due to the cool, wet summer. Arna, the lactose-free dairy company based in Bolungarvík, has already received a tonne of wild bilberries, which will be used in yoghurt for sale in shops all over Iceland.

Dolphin Species Never Before Seen in Iceland Beaches in Northwest
Two Risso’s dolphins washed ashore in Hrútafjörður in Northwest Iceland last week. Risso dolphins are a warm-water species found a bit to the east of Ireland and Northwest Scotland. But the largest number is found further south, in warmer seas.
Hrútafjörður, Iceland

Bacterial Infection Brucella Canis Suspected in Dogs in Iceland
The Icelandic Food and Veterinary Authority (MAST) has reason to suspect that a bacterial disease called Brucella canis has been found in dogs in Iceland. RÚV reports that Bruncella canis can—in very rare instances—be transmitted from dogs to humans, with young children, pregnant, and immunocompromised people at the greatest risk of serious infection.

30 percent have been bitten
The notorious lúsmý (Culicoides reconditus), a species of biting midge that has colonised Iceland for the first time in the past few years. The tiny flies can cause severe reactions, with large, sore, itchy spots that can remain angry for a week or more, and sometimes spread into a sort of rash.
Húnaþing vestra, Northwestern, Iceland

Wildfire Alert Phase Spreads to Southeast Iceland
A wildfire alert is now in effect across roughly half of Iceland following weeks of dry weather and fires across the Southwest quadrant of the country.

Bleeding tar makes road travel hazardous
Vegagerðin (the Road and Coastal Administration) is encouraging people to postpone journeys on Route 1 in the west and northwest of the country due to significant amounts of tar bleeding from the road surface and causing considerable danger and damage to vehicles. Clumps of tar collect and harden on the tyres of passing vehicles, making driving treacherous. Chunks fly off and have been causing some serious damage.

Record-breaking cold?
The thermometer at the main visitor centre in Þingvellir National Park went all the way down to –9.6°C last night and meteorologists confirm that is one of the coldest temperatures ever recorded in a built-up area at this time of year—and could even have been a new record.
Laugarvatn, South, Iceland

Surprise flood kills salmon in West Iceland
A jökulhlaup flood struck West Iceland’s Hvítá river in the early hours of Tuesday morning when water from a lagoon by the Langjökull glacier suddenly broke a new path and flowed in a different direction. Thick glacial mud now coats the river banks, and much of Borgarfjörður fjord.

Puffin saved by lucky chance
A group on a glacier expedition on Langjökull yesterday stumbled across a puffin lying in the snow. According to group leader Martha Jónasdóttir, the bird was found right at the centre of the glacier—Iceland's second-largest.
Borgarnes, West, Iceland

Deadliest storm in decades for Icelandic horses
Last week’s storm was the most fatal natural disaster to Iceland’s horses in decades. The situation was worst in Vestur- and Austur Húnavatnssýsla, but horses died elsewhere around the country as well.
Vesturland, Iceland

Largest Landslide in Icelandic History
The landslide is thought to be the largest that has ever occurred in Iceland. Experts say that the uncommonly wet summer weather is to blame for the event.
Borgarbyggð, Vesturland, Iceland

Coldest January In Decades
The average temperature in Iceland this January was colder than it has been in the last decade.

Record Breaking Hot Water Usage in November
There has never been more use of hot water in the capital area in November than this year. The temperature that month was measured as quite cold according to the Icelandic Met Office, explaining the need for more hot water.
Hveragerdi, South, Iceland

Global Warming Might Cause Increased Volcanic Activity in Iceland
When glaciers covered larger parts of Iceland, there was less volcanic activity in the country, a new study has found.

Poisonous Mushroom in Iceland
It has recently been confirmed that a poisonous mushroom, by the name of Steinkrympill has found its way to Iceland.
Laugarvatn, South, Iceland

Mysterious Sheep Death Investigated
Sheep, primarily ewes and their lambs, have died in great numbers this past lambing-season. The cause has yet to be determined, and farms all around Iceland appear to be affected.
Búðardalur, West, Iceland

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