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Because it's cheap and easy to generate radio waves, add information to them, detect them at great distances, separate one from out of many, and recover the information carried by the one you want. Plus, they cover the distance from one place to another quite rapidly.
As the distance from the earthquake to the seismograph station increases, the time interval between the arrival of P waves and S waves also increases. This is because S waves travel slower than P waves, so the further distance allows more time for the S waves to catch up and be recorded after the P waves.
The distance between the tops of waves is called the wavelength. It is measured as the distance between two consecutive crests (or troughs) of a wave.
The maximum distance a molecule can be moved from its normal position by a wave is equal to the amplitude of the wave. This distance is typically small for light waves (such as electromagnetic waves) but can be more significant for mechanical waves like sound waves or water waves.
The term for the distance between two crests of water waves is wavelength.
The time-distance graph of seismic waves shows the relationship between the time it takes for seismic waves to travel and the distance they travel. It helps in determining the speed at which seismic waves propagate through the Earth's interior and provides information about the structure and composition of the Earth's layers.
Sound waves.
When you speak, your vocal cords vibrate to produce sound waves. These sound waves travel through the air and enter your friend's ears. Your friend's ears pick up the sound waves, which are then transmitted to the brain where they are processed as speech and understood as words.
The distance between a seismological recording station and the earthquake source is determined from the arrival times of seismic waves at the station. By comparing the arrival times of P-waves and S-waves, seismologists can calculate the distance to the earthquake source using the difference in their arrival times.
the distance to the earthquake's epicenter. P waves, or primary waves, travel faster than S waves, or secondary waves, so the interval between their arrival times can be used to calculate the distance the seismic waves have traveled. By measuring this time difference at different seismograph stations, geologists can triangulate the epicenter of the earthquake.
The difference between the arrival times increases as the distance from an earthquake epicentre increases as S-waves travel more slowly than P-waves so the greater the distance the further they lag behind.