Do you see any correlations from all the strong earthquakes & volcanoes throughout the world?

How is Eyjafjallaj�kull Volcano doing in Iceland? I heard of one in Chile that was probably greater? How are volcanoes rated in terms of their plume... ash? Will earth become cooler overall because of these volcanic eruptions? Invest in other natural resource power source, but not solar since sun might be hidden for quite awhile. If no more eruptions occur, how long will it take for earth to see the sunshine more directly & frequently? Thank you for your expertise on this one!