A second volcano in Iceland has shown signs that it may erupt soon, according to a report from the University College of London.
British experts predict the eruption could be larger and fiercer than Eyjafjoell, the neighboring volcano that erupted back in April.
Researchers have been studying an ash cloud from the Eyjafjoell eruption that has been floating over Scotland.
They say the ash plume carries a "significant and self-renewing electric charge, "and warn the charged particles coupled with appropriate weather conditions could ignite the eruption of the second volcano.
The report also warned that "future moderately to highly explosive Icelandic eruptions combined with appropriate weather conditions are highly likely to cause a repeat of the recent air transport disruption."