ESC-1
Major earthquakes are often followed by somewhat smaller events known as ________.
Aftershocks
Where do most earthquakes occur?
At or near plate boundaries
Why are there so many earthquakes in California?
California is a plate boundary
When an earthquake occurs, energy radiates in all directions from its source. The source is also referred to as the ________.
Focus
________ have the highest velocities.
Primary waves
The elastic rebound theory for the origin of earthquakes was first proposed by ________ following the ________ earthquake.
Reid; 1906, San Francisco
Which one of the following statements is correct?
S waves travel through solids and P waves travel through solids and fluids
An instrument that detects and records seismic waves is referred to as a(n) _______________.
Seismograph
On a typical seismogram, ________ will show the highest amplitudes.
Surface waves
Which of the following statements is correct?
The two main types of waves are Body and Surface waves.
