Stromboli
is one of the few volcanoes on earth displaying continuous
eruptive activity over a period longer than a few years or
decades. Its historic record goes back to more than 2500 years
before present, and there is evidence that its persistent
activity has been going on for as long as 5000 years. Most of
this activity is of a very moderate size, consisting of brief and
small bursts of glowing lava fragments to heights of rarely more
than 150 m above the vents. Occasionally, there are periods of
stronger, more continuous activity, with fountaining lasting
several hours