Earthquakes Flashcards
P-waves
seismic wave that causes (back and forth motion)
S-waves
Seismic wave that causes (side to side motion)
eqicenter
Point on earths surface directly above the starting point
Focus
Point along the fault at which the first motion of an earth quake occurs
Ring of Fire
Linear zone of seismic and volcanic activity
Strike-Slip Fault
A fault on which two blocks slide past one another
Normal Fault
inclined fractures where the blocks have mostly shifted vertically
Reverse Fault
A fracture or zone between 2 blocks to move relative to each other
P-Waves
Back and forth motion
S-Waves
Side to side direction
Epicenter
Earths surface directly above the starting pont
Focus
Point along the fault at which the first motion occurs
Richter Magnitude Scale
Measure the strength of an earthquake
Explosive Volcano
Most violent type of eruption
Nonexplosive Volcano
The most common type of eruption
Krakatoa
island in indonesia
Yellowstone Super volcano
1000 times more powerful than a regular volcano
Reverse Fault
Fault plane dips toward the up thrown block.
San Andreas Fault
Right moving strike fault - boundary between North american plate on east and pacific plate on west.
Mid-oceanic ridge
An underwater mountain system.
Shield volcano
Large volcano with shallow sloping sides.
Cinder cone volcano
The smallest type of volcano.
Composite Volcano
Built up by many layers of hardened lava and tephra.
Hot Spot
Area or region with hot temperature in comparison to its surroundings.
Mt. Vesuvius
Stratovolcano - active in Gulf of Naples, Italy. Built up of many layers of hardened lava.
