Types Of Volcanic Eruption & Volcanic Hazard And Effects

Question 1

• Excessively explosive types of eruption of gas and pyroclastic materials.

Answer 1

PLINIAN ERUPTION

Question 2

Is a violent eruption due to the contact between water and magma.

A large column of very fine ash and high-speed and sideway pyroclastic emission of materials called base surges are observed.

Answer 2

PHREATOMAGNETIC
ERUPTION

Question 3

They usually commence with phreatomagmatic eruptions, which can be extremely noisy due to the rising of magma and heating of water in the ground.
is characterized by tall eruption columns that reach up to 20 km high with pyroclastic flow and ash fall tephra

Answer 3

VULCANIAN

Question 4

The —— eruptions are the smallest types of explosive eruptions. An individual Strombolian explosions is the result of sudden release of volcanic gasses.
lt is a period weak to violent eruption characterized by fountain lava

Answer 4

STROMBOLIAN ERUPTION

Question 5

is a stream-driven eruption as the hot rocks come in contact with water.
It is short lived, characterized by ash columns but may be a beginning of a larger eruption.

Answer 5

PHREATIC/ERUPTION

Question 6

Fast moving hot mixtures of gas, ash, and molten rocks moving away from the volcano to the ground

Answer 6

Pyroclastic flow

Question 7

Mixture of water, molten rocks and debris flowing down from the side of volcano to the ground. It is also called as Lahar.

Answer 7

Mud flow

Question 8

Pulverized rocks, sand, gritty and harsh glasses out in the shoot air by volcano.

Answer 8

Ash fall