Earthquakes And Skata Flashcards
Deep focus earthquakes
True
T or f the epicenter of EQ is on surface
True
Landslide t or f
True
T or f EQ produce holes that shut and open and swallow the homes
False
8.0 EQ occur how frequently
1-2 a ur
What waves cause the most damage during EQ
Surface waves
T or f the tectonic plate boundary under the Indian Ocean cusses the worst EQ
False the worst EQ occur at pacific rim
Dip slip faults
A fall in which to fall blocks move past each other vertically
What is the slow movement of rock on opposite sides of the fault
Fault creep
Richter scale?
A mathematical scale that measures the actual amount of seismic activity on of earthquake
What is the focus point
A place inside the earth where EQ begins
Seismograph?
An instrument that measures and records earthquake waves
Reverse fault
A fault in which the hanging wall moves up a relation to the foot wall
Seismic waves
Waves of energy that travels through all the layers
Epicenter
The play on the earth surface directly above and earthquakes focus
Normal fault
A fault in which the hanging wall moves down in relation to the footwall
Strike slip fault
A fall in which to file box move past each other horizontally
What are seismic waves that travel me across surface
Surface waves
If you’re outside when earthquake hits what should you do
Move away from powerlines buildings and trees go to open field
How are Sue Nami’s formed
Underwater earthquake and the fact is a giant title wave that wipes out almost everything in Its Way, Earth grow transfers energy to water
Where should you go inside to protect you from falling objects etc.
Under tables a nearby doorways
Why do you fires often follow earthquakes
Because gas lines and powerlines break and fall and cause fires
Why do aftershocks occur
Earth is still settling they are like mini earthquakes
How does the Richter scale measure earthquakes what is the range of ratings mean
It measured seismic activity each level is 10 times greater than the level below it
How long can aftershocks continue for
Weeks
How are most skyscrapers and buildings built
To move along with the waves
What’s the difference between a 4.0 and a 7.0
1000 times greater
Where do the most disastrous disastrous earthquakes occur
Eppy center
Where do the most severe earthquakes happen
Convergent boundaries
What is the mercalli scale based off of
Eyewitnesses
