Like the article says, Etna is usually doing something.
Its the volcanoes which are not "dead" but dormant which bear watching - like St. Helens and Vesuvius.
Etna is in Sicily. The only other two active volcanoes in Europe are Stromboli in the Liparian Islands off northern Sicily and Vesuvius in the Bay of Naples somewhat north.
I think I read somewhere that the ancient Greeks believed Hephaestos, the God of smiths had his shop under Etna and the fire came from his forge.
I read somewhere that the Naples seaport is rising due to the caldera that underlies the region and fuels Vesuvius. It might be the presage of one gigantic blow!
St Helens is not dormant, it has been in a constant mild eruptive state since oct. 2004
http://www.fs.fed.us/gpnf/volcanocams/msh/