Eruption Types/Styles

Question 1

A systematic classification of volcanic eruptions based on observations during an eruption.

Answer 1

VEI

Question 2

What are the eruption Types according to eruptiveness?

Answer 2

Effusive - Quiet
Explosive - Loud

Question 3

What are the eruption types according to mechanism?

Answer 3

1. Magmatic - magma-driven
2. Phreatic - steam-driven
3. Phreatomagmatic - combination of both.

Question 4

What are the different eruption styles?

Answer 4

1. Icelandic
2. Hawaiian
3. Strombolian
4. Vulcanian
5. Pelean
6. Plinian
7. Phreatic
8. Phreatomagmatic

Question 5

_______ Eruptions are effusive, quiet, eruptions that produce large volumes of very hot, thin, runny lava and extrudes via fissures.
Give an example

Answer 5

Icelandic
-Ex. 2021 Fagradalsfjall Eruption

Question 6

_______ Eruptions are similar with Icelandic eruptions, effusive eruptions of large volumes of very hot, thin, runny lava but originates from vents of the volcanoes.
Give an example.

Answer 6

Hawaiian
-Ex. 2018 Kilauea Eruption

Question 7

_______ Eruptions are more explosive eruptions that shoot thicker lava along with a burst of steam, gas and ash that spatters molten lava.

Answer 7

Strombolian

Question 8

______ Eruptions are series of discrete, loud eruptions in “throat-clearing,”canon-like explosions that shoots high velocity blocks, and bombs.

Answer 8

Vulcanian

Question 9

______ Eruptions, or Nuée Ardente eruptions, occur when large amounts of tephra, gas, and lava are erupted laterally from the crater, producing “glowing” avalanches.
Give an example

Answer 9

Peléan Eruptions
- Ex. 1984 Mayon Volcano

Question 10

______ Eruptions are very large, explosive eruptions that involves very viscous magma and produce very large volumes of ash and tephra that can cover a very wide area.
Give an example

Answer 10

Plinian
-Ex. 1991 Pinatubo Eruption

Question 11

______ Eruptions occur when water is heated even without contact with magma, and erupts as a mixture of hot water and steam. A common example occurs with geysers.
Give an example.

Answer 11

Phreatic
-Ex. 2020 Taal Eruption

Question 12

______ Eruptions, also called Surtseyan, are explosive eruptions that occur when water interacts with magma and violently bursts into steam and volumes of ash.
Give an example.

Answer 12

Phreatomagmatic
-Ex. 2018 Anak Krakatau Eruption