The last known eruption was on March 23, 1863.

Only two known historical eruptions have taken place, one in 1909 and another in 1921.

It is the largest known explosive eruption on Earth in the last 25 million years.

The only other known historical eruption produced weak explosions in 1957.

The last known eruption was a trachyte flow which occurred in the early 20th century.

It was the first known eruption on the island in 10,000 years.

Its peak elevation is 1625 m. There have been four known eruptions.

The last known eruption is on May 27, 1951.

It appeared about 300,000 years ago and the last known eruption was c. 550.

The event remains the most lethal known eruption in America.