earthquakes

Question 1

earthquakes are usually associated with what

Answer 1

faulting

breaking of rocks

Question 2

what is caused by the shaking during an earthquake

Answer 2

seismic waves

Question 3

what are generated when rock within the crust breaks

Answer 3

seismic waves

Question 4

the shaking or tremblig caused by the sudden release of energy

Answer 4

earthquakes

Question 5

surfaces along which rock move under, over or past each other

Answer 5

fault surfaces

Question 6

types of stress

Answer 6

tension
compression
shear

Question 7

faults caused by blocks of crust pulling apart under the forces of tension

Answer 7

normal faults

Question 8

what can be formed by normal faults

Answer 8

entire mountain ranges or fault block mountains

Question 9

fault block mountain examples

Answer 9

basin and range province, tetons

Question 10

normal faults: the hanging wall block moves where

Answer 10

down relative to the foot wall block

Question 11

normal faults: the footwall is the

Answer 11

underlying surface of an inclined fault plane

Question 12

normal faults: the hanging wall is the

Answer 12

overlying surface of an inclined fault plane

Question 13

blocks of crust colliding under the forces of compression

Answer 13

reverse faults

Question 14

a prevalent feature in continent-continent collisions

Answer 14

reverse faults

Question 15

accompanying folding of rocks

Answer 15

reverse faults

Question 16

reverse faults: the hanging wall block moves

Answer 16

upward and over relative to the footwall block

Question 17

two blocks move in horizontal but opposite directions of each other

Answer 17

strike slip faults

Question 18

directions of offset

Answer 18

right lateral offset

left lateral offset

Question 19

the point within earth where faulting begins

Answer 19

focus or hypocenter

Question 20

the point directly above the focus

Answer 20

epicenter

Question 21

an instrument that records earthquake events

Answer 21

seismographs

Question 22

zigzag patterns on the paper

Answer 22

seismograms

Question 23

what draws the zigzag patterns

Answer 23

pendulum

Question 24

convergent boundaries: what increases along a dippling seismic zone

Answer 24

focal depth

Question 25

a dippling seismic zone

Answer 25

benioff zone

Question 26

waves that travel through the earth that earthquakes generate

Answer 26

seismic waves

Question 27

elastic energy that radiates outward in all directions from the focus

Answer 27

seismic waves

Question 28

two types of seismic waves

Answer 28

body | surface

Question 29

types of body waves

Answer 29

primary | secondary

Question 30

types of surface waves

Answer 30

rayleigh | love

Question 31

spread outward from the focus in all directions

Answer 31

body waves

Question 32

spread outward from the epicenter to the earth's surface

Answer 32

surface waves

Question 33

these waves can move rock particles in a rolling motion that very few structures can withstand

Answer 33

surface waves

Question 34

these waves moves slower that body waves

Answer 34

surface waves

Question 35

the first waves reach earthquake recording station

Answer 35

primary waves

Question 36

fastest waves

Answer 36

primary waves

Question 37

travel through solids liquids and gases

Answer 37

primary waves

Question 38

compressional or longitudinal wave

Answer 38

primary waves

Question 39

material movement is in the same direction as wave movement

Answer 39

primary waves

Question 40

arrive at the earthquake recording station later than primary waves

Answer 40

secondary waves

Question 41

slower than p waves

Answer 41

secondary waves

Question 42

travel through solids only

Answer 42

secondary waves

Question 43

transverse wave or shear waves

Answer 43

secondary waves

Question 44

move material perpendicular to wave movement

Answer 44

secondary waves

Question 45

travel just below or along the grounds surface

Answer 45

surface waves

Question 46

seismic waves moves along the outer layer of earth

Answer 46

surface waves

Question 47

travelling along the ground with up and down and side to side motion

Answer 47

surface waves

Question 48

slower than b waves

Answer 48

surface waves

Question 49

especially damaging to buildings

Answer 49

surface waves

Question 50

up and down motion

Answer 50

rayleigh waves

Question 51

side to side motion

Answer 51

love wave

Question 52

seismic wave behavior

Answer 52

p waves s waves l waves r waves

Question 53

after an earthquake, what can be used to calculate the distance from the seismograph to the epicenter

Answer 53

the difference in arrival times at a seismograph station

Question 54

how many seismograph stations are needed to locate the epicenter of an earthquake

Answer 54

three

Question 55

the what of the circles locates the epicenter

Answer 55

intersection

Question 56

subjective measure of the kind of damage done and peoples reactions to it

Answer 56

intensity

Question 57

what lines identify areas of equal intensity

Answer 57

isoseismal

Question 58

what measures the magnitude

Answer 58

richter scale

Question 59

used to express earthquake magnitude on the basis of the height (amplitude) of the largest line (seismic wave, p or s) on a seismogram

Answer 59

richter scale

Question 60

how many people and structure are affecte by the seismic event; measures damage

Answer 60

intensity

Question 61

measures the intensity

Answer 61

mercalli scale

Question 62

using number from

Answer 62

1-12

Question 63

1 =

Answer 63

no damage

Question 64

12 =

Answer 64

total destruction

Question 65

the richter scale was originally developed for

Answer 65

southern california

Question 66

richter scale is also a

Answer 66

logarithmic scale

Question 67

minor earthquakes

Answer 67

3-4.9 magnitudes

Question 68

about how many earthquakes each year

Answer 68

55,000