Earthquake/Volcano Flashcards
ring of fire
a region around much of the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur
Strike-slip fault
vertical (or nearly vertical) fractures where the blocks have mostly moved horizontally
Normal fault
a type of dip-slip fault where the hanging wall moves downwards from the footwall
Reverse fault
a dip-slip fault in which the hanging wall moves upwards, relative to the footwall
P-waves
the fastest seismic waves and can move through solid, liquid, or gas
S-waves
the second waves to hit the seismographs
epicenter
the central point of something, typically a difficult or unpleasant situation
focus
the center of interest or activity.
Richter magnitude scale
a quantitative measure of an earthquake’s magnitude
explosive volcano
a volcanic eruption of the most violent type
nonexplosive volcano
the most common type of volcanic eruption.
. Krakatoa
a caldera in the Sunda Strait between the islands of Java and Sumatra in the Indonesian province of Lampung
Yellowstone supervolcano
a volcanic caldera and supervolcano in Yellowstone National Park in the Western United States
San Andreas fault
a continental transform fault that extends roughly 1,200 kilometers through California
Mid-oceanic ridge
a seafloor mountain system formed by plate tectonics
