Measurement and Prediction of Volcanoes (Leaving Cert Geography): Flashcards
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Practise the cards
15 cards from this deck
Seismometer placement radius for effective monitoring
Seismometer placement radius for effective monitoring
Within 20km of volcano vent
What is earthquake activity (volcanic)?
What is earthquake activity (volcanic)?
Increased seismic activity from magma moving through crust
Instruments measuring Earth's crust movements
Instruments measuring Earth's crust movements
Seismometers and seismographs
Ground deformation definition
Ground deformation definition
Changes in mountain shape from magma/gas pressure
Most obvious eruption indicator
Most obvious eruption indicator
Ground deformation
EDM device function
EDM device function
Measures horizontal movement using laser signals
Tiltmeter function
Tiltmeter function
Detects slope changes like a spirit level
What GPS satellites monitor for volcanoes
What GPS satellites monitor for volcanoes
Changes in volcanic shape over time
Lake Nyos disaster date
Lake Nyos disaster date
1986
Lake Nyos disaster death toll
Lake Nyos disaster death toll
Over 1,700 people and 3,500 livestock
Lake Nyos location
Lake Nyos location
Cameroon
Lake Nyos solution (2001)
Lake Nyos solution (2001)
Electric pump system to degas CO2
3 successful volcanic prediction examples
3 successful volcanic prediction examples
Mt St Helens 1980, Mt Pinatubo 1992, Mt Merapi 2010
4 main volcanic monitoring methods
4 main volcanic monitoring methods
Seismic activity, ground deformation, gas emissions, historical records
Purpose of historical records in prediction
Purpose of historical records in prediction
Understand eruption history to predict future eruptions