1. Largest Eruption
The 15 June 1991 was world’s largest volcanic eruption to happen in the past 100 years. Some say its the second largest but due to the fact that it was the most destructive and in the most densely populated area, many experts have labelled it the largest in recent history.
2. Thousands Of Earthquakes
In March and April 1991 prior to the mega event in June, molten rock known as magma rose around 32 kilometres from below earth towards the volcano’s surface. This caused thousands of small earthquakes and wild steam explosions that broke through three craters on the north side of the volcano.