primary hazards

Question 1

name all of the primary tectonic hazards

Answer 1

• pyroclastic flows
• lava flows
• Ash + tephra fall
• toxic volcanic gases

Question 2

what is a pyroclastic flow?

Answer 2

a hot, fast moving collection of volcanic matter which rushes rapidly down.

Question 3

what is a lava flow?

Answer 3

outpourings of molten rock from a vent during an effusive volcanic eruption

Question 4

what is ash + tephra fall

Answer 4

Ash and Tephra is produced when rocks are violently ejected with massive force.
(ash = <2mm)

Question 5

what are toxic volcanic gases

Answer 5

carbon dioxide, sulfur dioxide dissolved within magma. as magma reaches surface, lower pressure causes gases to release