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In Iceland, the Heikanes peninsula has been continuously accumulating magma for 210 straight days. Geologists say it could be the largest reservoir accumulated since the beginning of the current eruptive period, and ground deformation is already being detected by instruments.
According to records from the Icelandic geological monitoring released in May 2026, magma flow in Heikanes has remained “slow, but constant” for over seven months.
According to the material, this could be the largest reservoir accumulated since the current eruptive period began in the region.
For this reason, ground deformation is already being detected by instruments from the local meteorological office.
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Consequently, the most likely scenario outlined by scientists is a new magmatic intrusion — when magma rises through the crust, creating visible fissures on the surface.
For comparison, in Italy, Etna entered a new Strombolian-type eruption in parallel, according to the same geological sources.
Notably, Iceland is experiencing an eruptive cycle that began in 2021 and has already produced multiple eruptions in the Reykjanes peninsula region.
Why Iceland has a volcano every few months
Iceland is located at a unique point on the planet.
In fact, the island sits exactly on the Mid-Atlantic Ridge — the boundary between the North American and Eurasian tectonic plates.
For this reason, the country has about 130 active or potentially active volcanoes.
According to the Icelandic Met Office, the Reykjanes peninsula region (which includes the peninsula) entered an active phase in 2021 after almost 800 years of calm.
Since then, nine eruptions have been confirmed — an average of one every five months.
Consequently, villages like Grindavík have had to evacuate twice in less than three years.
Similarly, critical infrastructure — including the Svartsengi geothermal power plant and the Blue Lagoon — began operating under a permanent contingency plan.
What it means for Heikanes to accumulate magma for 210 straight days
The number of 210 continuous days is statistically high.
According to geologists, in the cycle that began in 2021, the average recharge lasted between 80 and 150 days.
Therefore, this reservoir represents an outlier.
According to records from the Icelandic meteorological office, magma flow is detected by seismographs, surface GPS, and volcanic gas meters.
Subsequently, these data are cross-referenced with satellite images that show ground deformation in millimeters.
As the portal recently showed, Iceland operates both the Blue Lagoon and its energy matrix with geothermal energy — in contrast to Brazilian cases where energy infrastructure faces other types of pressure.
Grindavík: the village that evacuated twice in three years
Grindavík had about 4,000 inhabitants before the eruptive cycle.
In November 2023, fissures opened within the village itself, requiring total evacuation.
Consequently, houses split in half, streets sank, and the main road broke apart.
According to the Icelandic government, some residents never returned.
On the other hand, the Svartsengi power plant and the Blue Lagoon, neighbors to Grindavík, were protected by earth barriers erected in record time.
Similarly, authorities began issuing dynamic risk maps — similar to weather forecasts, but for lava flows.
How Iceland transformed volcanoes into an energy matrix
Iceland produces about 30% of its total electricity from geothermal energy, according to local government data.
Therefore, the volcanic subsoil, which threatens the country, is also the foundation of its electrical system.
According to Reykjavik Energy, hot underground water heats 97% of Icelandic homes.
Subsequently, high-pressure steam moves turbines that generate clean energy.
According to the operator, this is one of the most advanced geothermal systems in the world.
As the portal showed regarding Angra 3, stalled for 39 years in Brazil, small countries like Iceland can deliver complex energy projects while others face chronic institutional paralysis.
Etna erupts during the same period
While Iceland accumulates magma, Italy observes redoubled activity.
According to geological records, Etna re-entered eruption in effusive “Strombolian” style phases in May 2026.
For this reason, authorities closed part of the access to the volcano for tourists — a routine, but indicative, operation.
According to the National Institute of Geophysics and Volcanology of Italy, Etna ejects lava in short episodes with intervals between days and weeks.
Consequently, Sicilian tourism deals with partial cancellations.
Similarly, although separated by 4,000 kilometers, Iceland and Etna show that the Atlantic-Mediterranean volcanic belt remains highly active.
What scientists monitor when magma accumulates
Seven signs usually precede an eruption:
- Continuous micro-earthquakes below 5 km depth
- Ground deformation on the order of centimeters per week
- Change in temperature of nearby hot springs
- Increase in sulfurous gases in atmospheric sensors
- Variations in geothermal well pressure
- Traces of harmonic tremor in seismograms
- Changes in local animal behavior recorded at stations
Consequently, the current 210 days have already triggered some of these signs — although the eruption itself has not yet begun.
According to the Icelandic Met Office, the current state is classified as “moderate alert,” below the immediate evacuation level.
What is still unclear about Iceland on alert
On the other hand, there are limits to what scientists can predict.
According to the Met Office, it is impossible to say precisely when the magma will break through the crust.
Furthermore, the exact location of the fissure, when and if it occurs, remains uncertain within a range of kilometers.
According to historical records, in some cycles, prolonged recharge did not end in eruption — the magma settled in deep chambers.
Nevertheless, after 210 consecutive days of constant magmatic flow, the scenario in Heikanes is the most charged Iceland has seen since 2021.
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