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VOLCANIC EXPLOSIVITY INDEX
| Scale
| Description
| Plume height (km)
| How often
| Example (date)
| 0
| nonexplosive
| < 0.1
| daily
| Kilauea
| 1
| gentle
| 0.1-1
| daily
| Stromboli
| 2
| explosive
| 1-5
| weekly
| Galeras (1992)
| 3
| severe
| 3-15
| yearly
| Ruiz (1985)
| 4
| cataclysmic
| 10-25
| 10s of years
| Galunggung (1982)
| 5
| paroxysmal
| > 25
| 100s of years
| St. Helens (1981)
| 6
| colossal
| > 25
| 100s of years
| Krakatau (1883)
| 7
| supercolossal
| > 25
| 1000s of years
| Tambora (1815)
| 8
| megacolossal
| > 25
| 10,000s of years
| Yellowstone (2,000,000 BP)
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