Where are most volcanoes on Earth located?
At the ring of fire
Along the mid-ocean ridge
In the center of continents
On islands
Use the seismogram below to answer the questions.
Which type of wave arrives first during an earthquake?
Primary (p-wave) waves
Secondary (s-wave) waves
Rayleigh waves
Love waves
What was the arrival of the P-wave?
7:42:00
7:42:25
7:42:30
7:42:50
What was the approximate arrival time of the S-wave?
What is the S-P lag time?
5 seconds
15 seconds
25 seconds
40 seconds