Tonga eruption 2022

Question 1

what income country

Answer 1

MIC

Question 2

what plate boundry

Answer 2

subduction zone running from new Zealand to Fiji

Question 3

how many killed

Answer 3

3 people but many injured and missing

Question 4

how many households affected

Answer 4

1200

Question 5

effects of the ash

Answer 5

contaminated water supplies and polluted water- raised risk of cholera and diarreah

Question 6

impacts on connections

Answer 6

-underwater cable broke communications
-flights cancelled

Question 7

physical impacts

Answer 7

-all islands affected by ashfall
-pyroclastic flow, volcanic gases (400,000 tonnes of sulphur dioxide and ashfall)
-20-60km plume of ash
-Tsunami in New Zealand

Question 8

response

Answer 8

-red cross disaster preparedness rations for 1200 people
-coordination of supplies from NGO’s and various countries e.g. France
-aid drops of drinking water and desalination equipment

Question 9

VEI scale

Answer 9

6

Question 10

what month did it occur

Answer 10

January

Question 11

why did it explode

Answer 11

caldera below sea level- interaction with gas-rich magma and sea water

Question 12

why did the tsunami occur

Answer 12

due to shockwaves causing a sudden change in air pressure which elevated the ocean by a few centimetres