How is the distance to the epicenter of an earthquake determined ...

[SGallaher96]

How is the distance to the epicenter of an earthquake determined using a seismograph?
  a. How hard the seismograph needle swings back and forth is noted.
  b. Travel time is clocked and then compared to the reported time of the earthquake at the
  epicenter.
  c. The arrival times of surface waves are noted.
  d. The delay time between the P-wave and the slower S-wave is considered.
  e. You cannot do this with a single seismograph

Question 2

How much more energy does a magnitude 8 earthquake release than a magnitude 7 earthquake?
  a. 2 times more
  b. 10 times more
  c. 30 times more
  d. 900 times more
  e. 27,000 times more

[sylvia]

Answer to Question 1

D

Answer to Question 2

C

[SGallaher96]

Thank you

[sylvia]

No problemo