The total mass of the erupted material ( including magma ) was 35 million metric tons The eruption reached 3 on the Volcanic Explosivity Index.
32.
Such calderas are usually formed by large cataclysmic eruptions reaching 7 on the Volcanic Explosivity Index ( described as " super-colossal " ).
33.
It threw about 7.3 km 3 of volcanic rock into the atmosphere, placing its Volcanic Explosivity Index ( VEI ) at 5.
34.
The weakest are Volcanic Explosivity Index ( VEI ), an order of magnitude scale ranging from 0 to 8 that often correlates to eruptive types.
35.
His descriptions of these eruptions became the basis for two indices in the Volcanic Explosivity Index : 1-Strombolian eruption, and 2-Vulcanian eruption.
36.
The event was quite minor only a Volcanic Explosivity Index 1 eruption but it produced explosions and flames that lit up the island, along with tsunamis.
37.
The eruption probably was a 7 on the Volcanic Explosivity Index, which would make it one of the largest eruptions of the last several thousand years.
38.
The Volcanic Explosivity Index ( VEI ) is used to quantify the amount of ejected material with a VEI-7 coming in at 100 km 3.
39.
The volcano is responsible for a large Holocene eruption with a Volcano explosivity index 7, the largest in the Andean Central Volcanic Zone for 5000 years.
40.
The eruption started with mafic minerals cover smaller areas than the more acidic members, also indicating a decrease of explosivity over the course of the eruption.
