| 11. | A large eruption occurred early during the Holocene which reached a volcanic explosivity index of 6.
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| 12. | Volcanic Explosivity Index ( VEI ) values for events in the Miocene epoch sometimes lack references.
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| 13. | It therefore is classed as having a Volcanic Explosivity Index ( VEI ) of 1 or 2.
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| 14. | All known eruptions at the volcano have had a Volcanic Explosivity Index ( VEI ) of 3.
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| 15. | This eruption has a volcanic explosivity index of 2, and was observed by a merchant ship.
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| 16. | Mashk volcano is rated with a Volcanic Explosivity Index of 6, the second highest among large volcanoes.
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| 17. | According to the Volcanic Explosivity Index, Plinian eruptions have a VEI of 4, 5 or 6.
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| 18. | For the 2010 30 period an eruption of Volcanic Explosivity Index 2 or more is expected based on statistics.
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| 19. | About 150, 000 years ago, a much larger explosive eruption occurred, probably of Volcanic Explosivity Index 5.
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| 20. | Tectonic earthquakes began early in January, resulting in an explosive Volcanic Explosivity Index 3 eruption later in that day.
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