Earthquakes Flashcards
How many deaths are attributed to earthquakes in the last 2000 years?
3.5 million deaths
What are the causes if earthquakes?
Motion along faults Sudden change in mineral structure Inflation of a magma chamber Volcanic eruptions Landslides Meteorites Nuclear detonations
What is the difference between the epicenter and the hypocenter?
Hypocenter is below surface epicenter is at the surface.
Which is the footwall and the hanging wall?
Footwall is below the fault hanging wall is above it
What is a normal fault?
Hanging wall moves down due to stretching.
What is a reverse fault?
Hanging wall moves up due to compression.
What is a thrust fault?
A reverse fault without a steep slope
What is a strike slip fault?
The fault version of Transform boundaries
What is an oblique slip fault?
Combo of strike slip and dip slip
Do faults move continually?
No the move in jumps due to friction
What are the two types of surface waves?
Love waves-like a snake
Rayleigh waves-like water
