Earthquake/volcano Flashcards
a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
Ring of Fire
a fault on which the two blocks slide past one another.
Strike-slip fault
a dip-slip fault in which the block above the fault has moved downward relative to the block below.
Normal fault
the block above the fault moves up relative to the block below the fault.
Reverse fault
seismic body waves meaning that they travel through the Earth’s interior.
P-waves
seismic body waves meaning they travel through the Earth’s interior.
S-waves
a wave is a propagating dynamic disturbance of one or more quantities.
epicenter
a point at which rays of light, heat, or other radiation meet after being refracted or reflected
focus
quantitative measure of an earthquake’s magnitude (size)
Richter magnitude scale
If a lot of gas is trapped within magma, pressure will build and build until eventually the magma erupts explosively out of the volcano.
explosive volcano
generally occur when magma is thin and flows easily.
nonexplosive volcano
a small volcanic island in Indonesia between Java and Sumatra
Krakatoa
a volcanic center that has had an eruption of magnitude 8 on the Volcano Explosivity Index
Yellowstone supervolcano
A fault in California where the North American and the Pacific tectonic plates meet and slide past each other.
San Andreas fault
a continuous range of underwater volcanoes that wraps around the globe like seams on a baseball
Mid-oceanic ridge
