Macpherson says the ash cloud is not unusual nor is the eruption of the volcano after 200 years of dormancy.

VOA: standard.2010.04.15

Macpherson says there is also no way of knowing whether there could be another eruption that could cause a similar ash cloud.

VOA: standard.2010.04.15

Colin Macpherson, a professor of Earth sciences at Britain's Durham University, says it's impossible to know how long the volcano will continue to erupt.

VOA: standard.2010.04.16

"There is an underlying theme throughout the plan - partnership, pro-activity, prevention, " Mr Macpherson said.

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"It's a handball, I think it was Stephen O'Donnell on the line, " said MacPherson.

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"From a personal view, that's what required - a freshness about Scottish football, " said MacPherson.

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