pinatubo

Question 1

hazards

Answer 1

9 hour long eruption, releasing gas and ash which rose 20 miles
pyroclastic flows at 80kmph

Question 2

causes

Answer 2

7.7 magnitude earthquake
allowed basalt to squeeze into magma chamber
reacted with magma causing increase in pressure which blew dome away

Question 3

impacts

Answer 3

$700 million in damage
650000 lost jobs
75000 homes destroyed
350 killed

20 million tons of sulfur dioxide released reducing global temps. by 0.5 degrees celsius
mudslides covered 50000 hectares, destroying crops

Question 4

prediction

Answer 4

scientists forecast eruption, saving 5000 lives as well as property
commercial aircraft warned but some jets sustained damage
hazard zonation maps circulated a month before

Question 5

preparation and post event

Answer 5

200,000 evacuated
new lahar monitoring warning evacuation system
engineering work to divert lahar flows to protect settlement (expensive)