Monitoring volcanoes

Question 1

seisomometres

Answer 1

earthquakes shows signs of impending eruptions

Question 2

ground deormation

Answer 2

bulging caused by rising magma. laser beams can provide accurate measurements of distance between two plate on a volcano

Question 3

geophysical

Answer 3

study physical properties associated with rising magma e.g. changes in magnetism can indicate upward movement of dense iron rich magma

Question 4

hydrology

Answer 4

changes in physical and chemical properties in water indicate rising magma

Question 5

gases

Answer 5

chlorine and sulphur can be emitted in higher than average concentrations

Question 6

remote sensing

Answer 6

cameras set up at rims can watch volcano and look for signs e.g. small eruptions