Earthquake 1
The place where all earthquakes occur.
What is on a fault?
The type of volcano found at oceanic hot spots.
What is a shield volcano?
The device used to detect and measure seismic waves.
What is a seismograph?
The location underground where magma accumulates under a volcano.
What is the magma chamber?
A warning sign for an incoming tsunami.
What is a fast receding shoreline?
A giant ocean wave caused by the movement of the ocean floor.
What is a Tsunami?
The type of volcano found at convergent plate boundaries.
What is a strato-volcano?
The place where earthquakes are detected and measured.
What is a seismograph station?
A very fast moving, extremely hot cloud of ash and gas created by a volcanic explosion.
What is a pyroclastic flow?
The best safety procedure when you are inside a building during an earthquake.
What is to immediately get under a door frame or desk?
The underground point of origin for an earthquake.
What is the focus?
The type of magma that builds shield volcanoes.
What is basaltic magma?
The intensity of an earthquake is measured using this scale.
What is the Modified Mercalli scale?
The two factors that create explosive eruptions.
What is the gas and silica content of the magma?
The type of convergent plate boundary where volcanoes do not occur.
What is a continent to continent convergent boundary?
The location where all earthquake surface waves begin.
What is the epicenter?
The type of magma that builds strato-volcanoes.
What is granitic and/or andesitic magma?
The point at which rocks break.
What is their elastic limit?
Two early warning signs of an impending volcanic eruption.
What is increased earthquake frequency and magnigute and surface deformation (i.e. rising surface elevation)?
The reason why you cannot predict "when" an earthquake will occur?
Because you cannot measure the amount of stress present in the rock strata.
The wave pattern of P and S waves.
What is a push-pull pattern for P waves (longitudinal) and a up-down pattern for S waves (transverse)?
The difference between granitic and basaltic magmas (identify and explain).
What is mineral content - basaltic magmas have low silica but high iron & magnesium content, and granitic magmas have high silica but low iron & magnesium content?
The S-P interval of an S-wave that arrives at 4:25:15am and a P-wave that arrives at 4:24:45.
What is 30 seconds?
Two types of volcanic formations that can either signal an impending eruption or develop at the end of an eruption.
What are lava domes and cinder cones?
The reason why it is easier to predict approximately when volcanoes will erupt.
Because they give many signs such as gas release, small earthquakes, and increasing ground temperatures.