The BBC has been accused of exaggerating the global knock-on effect from the increasing risk of a volcanic eruption of Iceland's Katla.
However, as the BBC focused on Katla another of Iceland's volcanoes was this morning showing signs of a possible eruption with sustained harmonic tremors being reported at Grímsfjall - just seven months after it last erupted sending an ash cloud over the skies of the UK and Europe.
Harmonic tremors are recognised as a tell-tale sign of the potential for an eruption.
Last Friday's BBC report claimed a Katla eruption had the potential to cause catastrophic flooding as it melts the frozen surface of its ice cap, sending billions of gallons of water surging into the Atlantic Ocean.
Despite several weeks of strong tremors at Katla, the volcano has actually very recently been showing a decline in activity.
And respected volcano observer Jón Frímann, who monitors volcanic activity on Iceland, said the BBC report was an exaggeration that annoyed him and other scientists.
In his blog, he wrote: “The news in question claims that an eruption in Katla volcano is going to have a global impact. This is nothing but a exaggeration in my view.
“While an eruption in Katla volcano might be big, the effects are mostly localized to Iceland. This was clear during the Grímsfjall volcano eruption in May of 2011, were the global effect was close to zero, there were some flight disruptions.
"But the effects were not something major like what happened during the Eyjafjalljökull volcano eruption. So the media is overestimating the effects of eruption in Katla volcano.
“To what end I do not know. But it sure annoyed me and the scientists that monitor volcanoes in Iceland.
“It is also important fact that Katla volcano did have an eruption this year. It took place on 8 and 9th July, 2011. With a smaller eruption on the 10th of July, 2011. This eruption was however a small one and did only melt the glacier, as it was not strong enough to break through the ice.
“In terms of effects of a large eruption in Katla volcano. One thing is clear. It is mostly going to local to Iceland, it might disrupt flights in Europe of the wind systems are unfavourable. Both over mainland Europe or for transatlantic flights. But transatlantic flight can in most cases route around the ash cloud if they need to.
“But the claim for global effects are just exaggeration and nothing else.”
Brynjar Björnsson, Seltjarnarnes, Iceland around 2 months, 2 weeks ago