Show:
study
parts of an earthquake
earthquake waves
Seismograph
misc
100

what is the study of earthquakes called?

seismology 

100

What is the point inside Earth where the earthquake begins?

the focus

100

What are the seismic waves called that travel inside the earth's crust called?

body waves

100
Around what time does the p- wave begin in this seismograph? Provide A.M or P.M

Around 19:57 (7:57 P.M)

100

Which scale to measure earthquakes uses roman numerals?

Modified Mercalli Scale
200

What do seismologists use to determine when a earthquake started?

seismograph

200

What is the point on Earth's surface directly above an earthquakes starting point?

the epicenter
200

What are the fastest seismic waves that can travel through solids, liquids, and gases called?

p-waves

200

Around what time does the s-wave begin in this seismogram? Provide A.M or P.M

20:11 (8:11 P.M)

200

Provide one thing that engineers can do to create an earthquake resistant building that is multiple stories tall.

base isolators, large/solid base, steel bracers, lighter roofs, etc. 
300

What is the scale used to measure how strong an earthquake is?

Richter Magnitude Scale

300

What is the name for a break in Earth's crust where tectonic plates slide?

fault 

300

Which seismic waves stretch rock sideways and cannot travel through liquids?

s-waves
300

What is the lag time between the p-and s-waves in this seismograph?

about 14 minutes

300

what can we infer about the ground beneath a structure that has partially sunk into the ground after an earthquake and what is this called?

the ground was either sandy or very wet, called liquefaction 

400

What does intensity measure?

the amount of damage caused by the earthquake and people's experiences with it

400

What are the giant pieces of moving crust called?

tectonic plates

400

What do p and s waves become once they reach the top of the crust?

surface waves

400
The farther away the seismogram site is from the epicenter of the earthquake, what happens to the lag time between the p- and s-waves?

the lag time gets farther apart. 

400

What can earthquakes cause to happen in the ocean?

tsunamis 

500

What are the 6 factors that affect intensity?

1) how populated an area is

2) how far away it is from the epicenter

3) how deep the earthquake started (focus)

4) the geology of the area

5) the kind of buildings in the area

6) how long the earthquake lasted

500
What are the waves of energy that travel through earth's crust called?

seismic waves

500

What is the time difference between when the p and s waves arrives called?

lag time

500

What CAN'T a seismogram tell us about an earthquake?

what direction it came from

500

Why are 3 seismic stations needed to determine where the epicenter of an earthquake is?

Since an earthquake's energy spreads out, one seismometer can't tell the direction it came from, only how long the lag time is- how far away it is. 


Two seismometers can be used to pinpoint two possible locations (where the circumferences of the circles meet). 

Three seismometers will have a circumference that all meet in one location.