Volcanic Predictions Flashcards
What can be measured to assess volcanic emissions before an eruption?
Spectrometers can be used to measure the amount of sulphur dioxide gas emitted by a volcano.
What happens to magma before an eruption?
Magma collects in the magma chamber.
What can the movement of magma cause?
The movement of magma can cause earthquakes.
How can earthquakes related to magma movement be measured?
Earthquakes can be measured with a seismometer.
What changes may occur in a volcano before an eruption?
The shape of the volcano may change due to magma gathering.
What instruments can measure changes in the slope of a volcano?
Tilt metres and geodimeters can measure changes in slope.
What temperature changes can occur before an eruption?
Temperature can rise before an eruption.
What instrument is used to measure temperature changes?
A thermometer can be used to measure temperature.
How can water levels change before an eruption?
Water levels may change if magma oozes onto the floor of a river or lake.
