Answer :
Answer:
Major earthquakes occur when there is rock movement along a fault (crack in the crust). The sudden slippage of huge rock masses sets up shock waves that travel through the earth. The point within the earth where the actual movement takes place is called the focus. The point on the surface directly above the focus is called the epicenter.
An earthquake epicenter can be located from records made of earthquake waves on devices called seismographs. One type of seismograph is a visible recording machine. A pen draws a pattern of the waves on paper that is attached to a revolving drum. The wave record from a seismograph is known as a seismogram.
A typical seismogram of an earthquake has three prominent wave patterns. The first waves to arrive are the P-waves (also called "primary" or "push-pull"). They are followed by the S-waves (also called "secondary," "shear," or "shake"). Finally, the L-waves ("long" or "Love") arrive. This investigation contains the seismograms from three different stations for an earthquake. See how accurately you can locate the epicenter of this quake.
Explanation:
Could I get brainliest If this helps?