These explosive eruptions continue intermittently for several hundred thousand years.
They had already worked out what had caused the explosive eruption.
It is the largest known explosive eruption on Earth in the last 25 million years.
All but one of them were considered explosive eruptions.
There is evidence for explosive eruptions in the past.
They are a common and devastating result of certain explosive volcanic eruptions.
Many remembered when their relatives were wiped out by an explosive eruption in 1790.
It has had five explosive eruptions between 1842 and 1914.
The most sustained period of activity began with explosive eruptions on May 28, 1990, and continued for over eight years.
It had at least five large explosive eruptions in last 3500 years.