Event profiles

Question 1

factors measured (9)

Answer 1

• magnitude
• speed of onset
• duration
• areal extent
• spatial predictability
• frequency
• economic damage
• death tolls/ injuries
• recovery rate

Question 2

typical results of an effusive eruption

Answer 2

• magnitude = low
• speed of onset = slow
• duration = long
• areal extent = clustered
• spatial predictability = predictable
• frequency = frequent
• economic damage = low
• death tolls/ injuries = low
• recovery rate = fast

Question 3

typical results of an explosive eruption

Answer 3

• magnitude = high
• speed of onset = fast
• duration = short
• areal extent = dispersed
• spatial predictability = random
• frequency = rare
• economic damage = high
• death tolls/ injuries = high
• recovery rate = slow

Question 4

why effusive eruptions present its results

Answer 4

• M = low - less pressure in eruption
• SofO = slow - lava has low viscosity
• D = long - no major reaction, more continuous bubbling
• AE = clustered - runny lava but smaller explosion
• SP = predictable - monitor plates and heat satellite magma plume
• F = frequent - always bubbling, gas can escape thin lava
• ED = low - contained, small eruption
• D/J = low - contained eruption
• RR = fast - communities tend to have this as a part of their lifestyle

Question 5

purpose of an event profile

Answer 5

can compare two events - of the same nature or different

Question 6

evaluation of an event profile

Answer 6

• easy to read and understand scale
• factors assess recovery, monitoring and planning ability
• assess over time/ duration
• allows a better understanding of the nature of a hazards