Final answer:
Seismologists align the seismogram with the time-distance graph by analyzing the arrival times of seismic waves at different recording stations and plotting the distances on the graph.
Step-by-step explanation:
Seismologists align the seismogram with the time-distance graph by analyzing the arrival times of seismic waves at different recording stations. They use the P-wave and S-wave arrival times to determine the distance from the epicenter of an earthquake to each station. By plotting these distances on a time-distance graph, seismologists can align the seismogram with the graph by matching the recorded arrival times with the corresponding distances.
Learn more about Analyzing seismic waves