L4 - Sublime Or Ridiculous Flashcards
How can ash from volcanic eruptions affect communications/transport
Ash can damage plane engines and make it difficult for planes to travel eg. Air travel disruption after 2010 Eyjafjallajökull eruption causing worldwide flight delays
What is a long-term positive impact of an eruption?
Improved soil - land is more fertile
What is the effect of lava bombs?
Volcanic (lava) bombs can rain down on settlements, which impacts properties and people due to lava flow.
What can accumulations of ash cause?
Roofs to collapse
Pyroclastic flow is a typical impact of an eruption. Define pyroclastic flow
A dense, destructive mass of very hot ash, lava fragments, and gases ejected explosively from a volcano and typically flowing at great speed.
What is the effect of heavy rainfall following an eruption?
Flooding
What is are lahars?
When ash and mud from a volcanic eruption mix together with rain or melting snow - so fast mudflows called lahars are created
Earthquakes often occur with volcanic eruptions. Name a common effect of these earthquakes
Ground shaking
buildings get damaged
In Jokhlulhaup Iceland, there was an eruption. How many flights were cancelled as a result?
100,000 flights ($1.7 billion)
Name physical primary changes due to the Jokhlulhaup eruption
Lightning storm
Heavy rain causing flooding
Poisonous gases
In Jokhlulhaup how many tonnes of flowers were destroyed?
400 tonnes ($3.8 billion)
What happened to agricultural output following the Jokhlulhaup eruption
It declined
What is a seismometer?
An instrument that measures and records details of seismic activity, such as force and duration. (Can help predict where and when earthquakes or volcanic eruptions will happen)
How far can lahars flow from their source volcanoes?
100km
Name a secondary physical impact of a volcanic eruption
Improved soils
Climate cols - less co2 from planes/ more so2 from volcanoes
Jokulhluaps - glacier megalfood
