recording+earhquakes

To record earthquakes you use seismographs. A Seismograph: vibrations in the ground are detected and record by using the seismograph. A seismograph has 3 modern component that consist of 3 sensing devices: One device records the vertical motion of the ground. The other two record horizontal movement. Seismographs record motions by tracing lines that are shaped like waves on paper. They can also translate the motion into some sort of electronic signals. A tracing of earthquake motion that is recorded by a seismograph is a Seismogram. The first waves to be recoreded by a seismograph are the P-waves because they are the fastest moving waves. The slowest moving waves are S-waves so they are the second waves to get recorded. the love and rayleigh waves are the last to get recorded because they are really slow.