The eruption took place about 40 kilometres from Reykjavik, near the Fagradalsfjall volcano in south-west Iceland, and it broke out for six months in March-September 2021, attracting tourists and local residents who wanted to see it live.
On Wednesday, witnesses observed a strip of glowing red lava that was dug from the ground to a height of 20 to 30 metres into the air.
The Icelandic Meteorological Office, which monitors seismic activity in the country, estimated the fracture to be approximately 300 metres, and the statement states that the eruption began in the Meradallir Valley, less than a kilometre from the site of last year's eruption.
The environmental eruption occurred after a period of intense seismic activity, with some 10,000 earthquakes recorded since Saturday, including two with a magnet of at least 5.0.
Mount Fagradalsfjall belongs to the volcanic system of Krisuvik on the Reykjanes peninsula in south-west Iceland.
Although there was no ash plume, the agency stated that air pollution was possible due to the release of gas. Gaza from the volcanic eruption, especially sulphur dioxide, could rise in the immediate vicinity of the hot spot, pose a health hazard and even lead to death.