According to David Learmont on SKY News a while ago he said it's impossible to predict when this eruption will stop, and he also said it's a very real possibility its bigger and more damaging sister volcano could erupt at any time. He said there would be no flights within the next 5 days, and the only reason he couldn't predict further ahead is that no-one can be accurate on 5 plus days forcesats.
What he did say, though, was that the worst possible secenario of the volcanoes erupting for the next 2 years is a very real possibility, and yes, we will be in terrible trouble if that's so.