Reykjavik: Iceland lowered its warning code for possible volcanic disruption to the aviation industry to orange from red on Sunday after further analysis of an apparent eruption under a glacier found there had been no eruption after all.
The risk level had been raised to red, the highest level on the country's five-point alert system, on Saturday after authorities detected signs of a small eruption beneath a glacier near the Bardarbunga volcano in central Iceland.
Ash from the eruption of Iceland's Eyjafjallajokull volcano shut down much of Europe's airspace for six days, affecting more than 10 million people and costing $1.7 billion.
"Observations show that a sub-glacial eruption did not occur yesterday.
"The intense low-frequency seismic signal observed yesterday has therefore other explanations," the Icelandic Met Office said.
The office had therefore decided to move the aviation warning code from red to orange, it said, but since there was no sign the seismic activity was slowing down, an eruption could still not be excluded.
The national police commissioner said separately that all restrictions on aviation had been cancelled.