volcanic activity

Question 1

background about eyjafjallajokull explosion

Answer 1

it is in iceland.
a stratavolano, spewing basaltic lava causing a jokuhlaup
VEI 4
ash plume 10km

Question 2

primary impacts

Answer 2

main road reached to allow water to flow safely to sea rather than endangering the bridge/ cheaper to do
Fresh fish exports were deeply affected

overall impacts minimised to due to hazard management

Question 3

secondary impacts

Answer 3

mass global airline disruption by the 10km ash plume reducing visibility due to its fine silica content
stranding of 400,000 Britons world wide
£30 B los to ailine sector but 2.8 M less tonnes of C02 released as a result

Question 4

responses

spacial scale

Answer 4

rural area, nearest town 7km was evacuated

700 evacuees but risk low

Question 5

links to models

Answer 5

park model for different countries, Iceland not directly affected but caused no deaths
people stranded have a low quality of life

Question 6

links to models

hazard mangement

Answer 6

mitigation - no
adaptation - allowed the road to flood
preparedness -strong evacuation plans very well coordinated
monitoring - well established prior to event as area of scientific interest, (tiltometer and seismographs)

Question 7

> Example of secondary hazard to volcano

Neval del Ruiz stratovolcano

Answer 7

In columbia, erupted in 1985, EXPLOSIVE eruption realeasing viscous rhyolitic lava (in the form of pyroclastic flows)
triggered the melting of glacier on the summit forming a deadly, fast flwoing lahar
encompassing 85% of area killing over 23,000