Tectonic Hazards

Question 1

Volcanoes

GPS

Answer 1

Pressure from rising magma deforms the volcano. GPS measures ground deformation . It uses satellites and radio waves.

Question 2

Volcanos

Seismometers

Answer 2

Before eruption magma moves into the area beneath and collects in a magma chamber. Making vibrations so the seismometer measures ground vibrations.

Question 3

Volcano

Tiltmeters

Answer 3

They measure tiny changes in the slope angle or tilt of the ground.

Question 4

Volcanoes defences

Explosives

Answer 4

These can disrupt lava flow . It blocks the lava flow from the mountain.

Question 5

Volcano defences

Earth walls/barriers

Answer 5

These constructions can deflect lava. It can divert flows.

Question 6

Volcano defences

Spraying lava with water

Answer 6

Spraying large amounts of water can cool the flow.

Question 7

Earthquakes

Building structures

Answer 7

Yokohama landmark tower- flexible structure can absorb force of earthquake

San Francisco airport- giant ball bearings reduces ground movement

Question 8

Volcanoes

GAS SAMPLING

Answer 8

As magma nearers the surface of the volcano gas escapes. sulphur dioxide appears here if it changes the amount it give indication of an eruption.

Question 9

Gas sampling example

Answer 9

Mount piñatubo in Philippines

Question 10

GPS example

Answer 10

Mount at Helens new yorkstate

Question 11

Tilt meter example

Answer 11

Soufriere hills Montserrat