VEI
Description
Plume Height
Volume
Classification
How often
Example
0
non-explosive
<100 m
1000s m3
Hawaiian
daily
Kilauea
1
gentle
100-1000 m
10,000s m3
Haw/Strombolian
daily
Stromboli
2
explosive
1-5 km
1,000,000s m3
Strom/Vulcanian
weekly
Galeras, 1992
3
severe
3-15 km
10,000,000s m3
Vulcanian
yearly
Ruiz, 1985
4
cataclysmic
10-25 km
100,000,000s m3
Vulc/Plinian
10's of years
Galunggung, 1982
5
paroxysmal
>25 km
1 km3
Plinian
100's of years
St. Helens, 1981
6
colossal
>25 km
10s km3
Plin/Ultra-Plinian
100's of years
Krakatau, 1883
7
super-colossal
>25 km
100s km3
Ultra-Plinian
1000's of years
Tambora, 1815
8
mega-colossal
>25 km
1,000s km3
Ultra-Plinian
10,000's of years
Yellowstone, 2 Ma


Volcanoes around the world:

Durango Volcano

Location: Northern Central Mexico (24.15 N, 104.45 W)
Summit Elevation: 2075m

- Consists of 100 cinder (ashes) and lava cones.
- Has a sequence from hydromagmatic eruptions during formation of the maars (circular volcanic landform), to strombolian eruptions, followed by post- maar lavas.

Little Sitkin Volcano

Location: Little Sitkin Island in the western Aleutian Islands (51.95 N, 178.53 W)
Summit Elevation: 1188m

- A small explosive eruption occurred in 1776.
- 2 aa lava flows occurred in 1828.


Biu Volcano

Location: NE Nigeria (10.75 N, 12.00 E)
Summit Elevation: 910m

- The trough runs from Niger delta to the Chad basin.
- Is filled with folded Cretaceous sediments and scarce volcanic rocks witha maximum total thickness of 5500m.
- Eruptions have been dated at 840,000 years ago.


Taftan Volcano

Location: SE Iran (28.60 N, 61.60 E)
Summit Elevation: 4050m

- Contains two summits, with solfatara on SE cone.
- 1902 smoke came from the volcano.
- 1993 a lava flow or sulphur flow occurred at the volcano.

Volcano Continued