http://www.iceland-tour-travel.com/iceland-volcano-predict/

How did the volcanoes?
I have a science project and need to know 1. How do volcanoes 2.Describe a rash (as Pompey, the iceland one etc) 3. Why is it difficult to predict when a volcano will erupt
1. when the land of the plates allow a conduit for magma to the surface. 2. I suggest you check Mauna Loa. probably the most documented eruptions. 3. for the same reason we can not predict earthquakes, the time or the results of the World Cup, too many variables.
Prediction of Patterns United States Economy – Depression