There was a minor, 4-hour eruption on August 26, 1972.

Some damage was caused by a minor eruption in 1821.

Several minor eruptions of lava were observed in 1954, 1955, 1958 the early 1960s.

There were three minor eruptions in the 19th century.

Since then, many minor eruptions have occurred, the most recent in September 2011.

However, there was an additional minor eruption more recently.

The series consists of three to five minor eruptions and one major eruption.

Six to eight minor eruptions occur about one hour apart.

The earliest known activity were minor eruptions in 1913, 1949 and 1950.

This led to another series of minor eruptions from the capacity audience, but there were, before long, other issues to debate.