a siesmic wave is a wave that travels through the earth. there are two MAIN types, P and S waves. a siesmograph shows the type of wave and how far away it is from that point.
Primary Wave (P wave)
A seismograph can locate a seismic wave.
The distance from an earthquake epicenter can be calculated using the time difference between the arrival of P-waves and S-waves at a seismograph station. By measuring this time lag and using the known velocity of seismic waves through the Earth's interior, the distance can be estimated. The greater the time lag between the arrival of the P-wave and S-wave, the farther the seismograph station is from the earthquake epicenter.
To estimate the distance from the seismograph station to the earthquake epicenter, we can use the typical speed of P waves (approximately 6 km/s) and S waves (approximately 3.5 km/s). The time difference between the P wave and S wave arrival is 2 minutes (or 120 seconds). Given that P waves travel faster, we can calculate the distance using the time difference, which would be approximately 360 km from the epicenter to the station.
No, to find the epicenter of an earthquake, you use the difference in arrival times between the P-wave and the S-wave at a seismograph station. The greater the time difference between the two waves, the farther the earthquake's epicenter is from that particular station. Subtraction is not directly involved in this process.
The Seismograph.
The S-P time method is used to determine the distance to an earthquake epicenter. The first step is to measure the time difference between the arrival of the primary (P) waves and the secondary (S) waves at a seismograph station. The second step is to use a travel-time graph to determine the distance to the epicenter based on the time interval between the P and S waves. Finally, by using data from at least three seismograph stations, the exact location of the earthquake epicenter can be triangulated.
The P-wave generally arrives before the S-wave during an earthquake. The time difference between them can help determine the distance to the earthquake's epicenter. In this case, if the S-wave arrived 11 minutes after the earthquake, you would need to calculate the time difference between the arrival of the P-wave and the S-wave to determine how long after the P-wave arrival the S-wave arrived.
The seismograph measured the intensity of the seismic waves
Seis
Seis
Movement in the earth's crust, as in earthquakes.