Earthquake 101
Wave Types and Measurement
Volcano Prediction
Types of Volcanoes
100
What is an earthquake?
A sudden and violent shaking of the ground, sometimes causing great destruction
100
What is this machine?
100
What signs can predict an volcano eruption?
Smaller earthquakes.
100
What volcanoes are formed by erupting erupt slowly?
Shield volcano.
200
What causes earthquakes?
The movement of tectonic plates.
200
What wave arrive last in an earthquake?
L - waves.
200
What happens before the large event (the eruption)?
Smaller events lead up to the eruption.
200
What volcanoes explodes during eruptions?
Cinder volcano
300
Where do most earthquakes occur?
At plate boundaries.
300
What waves arrive second in an earthquake?
Secondary waves.
300
What are precursor events?
Release of gasses and changing shape of the volcano.
300
What volcano is a mix of the properties of a shield volcano and a cinder volcano?
Composite volcano
400
Which area of the world has the most earthquakes? (hint Pacific)
The Ring of Fire
400
What waves arrive first in an earthquake?
Primary waves.
400
How are graphs and charts used to predict volcano eruptions?
Scientists look at past eruptions and see the patterns.
400
What is tephra?
Rock fragments and particles ejected by a volcanic eruption.
500
How many earthquakes happen in a year?
About 20,000 a year.
500
What type of measurement are earthquakes measured in? (How strong is it?)
Magnitude.
500
Why are rising temperatures part of predicting a volcano eruption?
The higher temperatures may be a part of the hot gasses coming from the volcano.
500
Where do volcanoes form?
Plate boundaries, specifically convergent.