| 1. | Both were explosive eruptions with a Volcanic Explosivity Index of at least 5.
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| 2. | The volcano has produced eruptions as powerful as Volcanic Explosivity Index degree six.
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| 3. | The eruptions ranked as a 4 on the Volcanic Explosivity Index.
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| 4. | The eruption had a Volcanic Explosivity Index ( VEI ) of at least 5.
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| 5. | The eruption had a volcanic explosivity index of 6.
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| 6. | A volcanic explosivity index of 2 has been estimated.
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| 7. | According to the Volcanic Explosivity Index, Plinian eruptions have a VEI of 4, 5 or 6.
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| 8. | This was Earth's most recent eruption reaching VEI-8, the highest level on the Volcanic Explosivity Index.
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| 9. | Volcanic Explosivity Index ( VEI ) values for events in the Miocene epoch sometimes lack references.
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| 10. | A large eruption occurred early during the Holocene which reached a volcanic explosivity index of 6.
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