volcanic hazards

Question 1

spatial distribution

Answer 1

along constructive or destructive plate boundaries, or located on hotspots

Question 2

what is vulvanicity measured using?

Answer 2

the volcanic explosively index.

Question 3

magnitude - the more powerful….

Answer 3

the more explosive

Question 4

frequency of eruptions…

Answer 4

varies per volcano

Question 5

how are frequency of volcanoes classed?

Answer 5

active, dormant or extinct?

Question 6

how many volcanoes erupt each month?

Answer 6

50-60

Question 7

has the frequency of volcanic eruptions changed ?

Answer 7

no

Question 8

how are volcanic eruptions regular?

Answer 8

the eruptions on each type of boundary are similar

Question 9

what can help estimate when eruptions take place?

Answer 9

reguarlrity of eruptions

Question 10

what can indicate an imminent eruption?

Answer 10

seismic activity, gases releasing, elevation etc.

Question 11

there is no…. to prediction to a volcanic eruption

Answer 11

no definite predictions

Question 12

what are some hazards caused by volcanoes?

Answer 12

lava flows, lahars, floods, tephra, toxic gases, acid rain, nuees Ardentes/pyroclastic flows

Question 13

what are lahars?

Answer 13

mudflow

Question 14

what causes lahars?

Answer 14

number of reasons, usually by melting ice at high latitudes

Question 15

what causes floods?

Answer 15

from melting ice sheets or glaciers at high latitudes

Question 16

what is tephra?

Answer 16

any type of rock that is ejected by a volcano

Question 17

what is acid rain caused by?

Answer 17

the gases such as sulphur dioxide are released into the atmosphere

Question 18

what are nuees Ardentes/pyroclastic flows?

Answer 18

clouds of burning hot ash and gas that collaspes down a volcano at high speeds