Mayon Case Study 2018 Flashcards
What is Mayon a result of?
A result of subduction of the Philippine sea plate underneath the Sunda plate as part of the Ring of Fire
What type of margin is Mayon?
Destructive - oceanic-oceanic forming an island arc
What type of volcano is Mount Mayon?
Composite cone and strato-volcano
How do eruptions at Mayon typically start?
Ash and basaltic eruptions which become longer-term andesitic eruptions later
What does lava start to do?
Flows sweep down the mountain sides and destroys crops
What did the large ash emissions from Mayon mainly affect?
Legaspi - the city
What is the population of Legaspi?
200k people
What is Lepaspi a centre for?
Tourism, education, healthcare, commerce and transport for the region
How did the roofs collapse in Lepaspi?
Ash
Why was there a high risk for lahars?
High rainfall amounts
Who monitored the eruption of Mount Mayon?
PHIVOLCS
Who is PHIVOLCS?
A Philippine government department dedicated to providing info on the activities of volcanoes, earthquakes and tsunamis
What year was Mount Mayon?
2018
What put local communities on alert in 2017?
Emergence of the lava dome
How much area did the eruption cover?
250km squared
How many people were affected by the eruption?
86052 people
How many people affected were staying in designated evacuation?
64895
How much did the Filipino government commit to for a ‘Cash for Work’ programme?
$1 million
What else did the Filipino government provide?
Hygiene packages for 50k families for 10 days and food packs for 100 days
Who else were called in for help?
Army
Who set up first-aid stations and welfare desks to provide support to affected individuals?
Philippine Red Cross
How did governments help internationally?
US government provided over $100k for families to buy essentials and promoted safe water and hygiene practices
What boundary is Mayon on? What does this cause?
Destructive which is denser and this means the Phillippine sea plate is sub ducted under the Sunda plate
What is a composite volcano?
Steep sided, symmetrical, cone-shaped volcano
How is a composite volcano formed?
From alternating layers of lava flows and volcanic ash
Who is majority at risk?
Farmers - rely on soil from volcanic ash
What do lava flows destroy?
Local agriculture - can become dependant on aid
In millions, how much damage was caused to agriculture?
3.4 million
What was the highest alert level for the eruption?
5 which meant hazardous eruption
