earth shake Flashcards
ring of fire
The Ring of Fire is 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
normal (extensional) faults;
Reverse fault
displacements combine vertical and compressional displacements.
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 point on the earth’s surface vertically above the focus of an earthquake
focus
The earthquake focus of an earthquake is the point where the rocks break.
Richter magnitude scale
quantitative measure of an earthquake’s magnitude Richter magnitude scale
explosive volcano
an explosive eruption is a volcanic eruption of the most violent type.
non explosive volcanos
People associate volcanoes with spectacular explosive eruptions, yet most volcanoes erupt basalt
karatoa
Krakatoa also transcribed Krakatau is a caldera in the Sunda Strait between the islands of Java and Sumatra in the Indonesian province of Lampung.
Yellowstone supervolcano
The Yellowstone Caldera, sometimes referred to as the Yellowstone Supervolcano, is a volcanic calderae supervolcano
san andreas fault definition
The San Andreas Fault is a continental transform fault that extends roughly 1,200 kilometerssan andreas fault definition
Mid-oceanic ridge
A mid-ocean ridge is a seafloor mountain system formed by plate tectonics. It typically has a depth of about 2,600 meters and rises about 2,000 meters
