hazards -distribution, magnitude, frequency, regularity, predictability

Question 1

what is the distribution of volcanoes?

Answer 1

.95% of volcanoes occur in a linear belt along plate margins eg -pacific ring of fire

Question 2

what are some examples of volcanoes that occur along plate margins?

Answer 2

.japan trench occurs along the eurasian plate
.tonga trench occurs along the pacific plate

Question 3

what is meant by the magnitude of a volcano?

Answer 3

.refers to the eruptions explosive power

Question 4

how are the magnitude of volcanoes measured?

Answer 4

.measured using a logarithmic scale -VEI scale (volcanic exclusivity index)

Question 5

what is meant by the frequency of a volcanic hazard?

Answer 5

.the distribution of a hazard throughout time (how often the hazard occurs)

Question 6

what does the frequency of volcanic hazards depend on?

Answer 6

.depends largely upon the type of volcano

Question 7

what is meant by the regularity of volcanic hazards?

Answer 7

.the rate of reoccurrence of a hazard

Question 8

what is meant by predictability of a volcanic hazard?

Answer 8

.monitoring is used to predict when an eruption is going to happen

Question 9

is it possible to predict the exact magnitude, nature and timing of eruptions?

Answer 9

.it is impossible to predict the exam magnitude, nature and timing of eruptions

Question 10

where are eruptions most predictable at?

Answer 10

.volcanoes that occur over hot spots and constructive plate boundaries

Question 11

what are some techniques that monitors volcanic hazards?

Answer 11

.remote sensing -an increase in groundwater temperature can suggest an eruption may occur
.gas -an increase in gasses being released from the volcano can suggest an eruption may occur