After looking up History's strongest volcanic eruptions, Stromboli was not listed, so I was wrong in stating that it was the strongest eruption. If an eruption is large enough , it is classifefied as a 'supervolcano'. Eruptions of this sort are thousands of times stronger than normal eruptions, the last such eruption occured near Lake Toba in Indonesia around 80000 years ago, it wiped out nearly all life in Indonesia, including humans. Sorry for the mistake you guys.
Nick