0
When siesmologists record arrival times of p waves and S waves at several seismograph stations they are looking for the earthquakes?
Wiki User
∙ 7y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What is a seismologist and what types of scientific tools do they use to locate earthquakes?
Seismologist use a seismometer or seismograph to record the P and S-wave arrival times.Please see the related question for detail on how this is used to locate an earthquake epicenter.Geologists use seismic waves to locate an earthquake's epicenter.
What is the fewest number of seismographic stations that must record the arrival time of P and S-waves?
That depends on what information you are interested in. A single seismic station station measuring the P and S-wave arrival time can make an estimate of the distance to the epicentre of the earthquake and based on this information and the amplitude of the measured waves can make an estimate of the earthquakes magnitude, whereas a minimum of three stations are needed to find the location of the epicentre. For more information on this process, please see the related question.
Do Geologists use the difference in the arrival time of P and S waves at a seismograph to determine the magnitude of an earthquake?
No. Seismologists (a type of geophysicist) use the difference in the arrival time of P and S waves to estimate the distance from the seismometer station to the epicentre of the earthquake.
How is the fact that P waves travel more quickly the S waves used to determine the distance of an earthquake's epicenter from a seismograph station?
Given the difference in arrival times, you can determine the distance from the epicenter.
Why are three seismogram readings needed to accurately pinpoint the epicenter of an earthquake?
To locate an earthquake, you need the data from at least three seismometer stations.The process is known as triangulation and is described in more detail below.The seismometer records the P and S-wave arrival times. P-waves travel faster through the earth than S-waves and so they arrive at the seismometer station before the S-waves and are recorded by the seismometer first.The difference in arrival time between the two types of seismic wave can be used to calculate the distance of the earthquake's epicentre from the seismometer (the equation to do this can be seen at the bottom of this answer).This can then be plotted on a map, by drawing a circle with a radius equal to the distance to the epicentre around the seismometer station. This is then repeated for the other two seismometer stations and the point where the three circles intersect is the location of the earthquakes epicentre.The above procedure is commonly automated using computers and numerical techniques so that a large number of differing seismic episodes can be processed efficiently.It should be noted that this is an imperfect process as a number of assumptions must be made about the material through which the seismic waves travel in order to estimate their speed.DE = DeltaT x (VP - VS) / (VS x VP)Where:DE = Distance to epicentre (km)DeltaT = Difference between P and S-wave arrival time (s)VP = P-wave velocity (km/s)VS = S-wave velocity (km/s)
What is the fewest number of seismograph stations that must record the arrival time of P and S waves in order for the epicenter of an earthquake to be located?
Three
How is the distance of a seismograph from the earthquakes related to the arrival times of the waves?
It starts from the center, I'm pretty sure, and then moves out from there. BORDERLANDS 2 ALL THE WAY!
What is a seismologist and what types of scientific tools do they use to locate earthquakes?
Seismologist use a seismometer or seismograph to record the P and S-wave arrival times.Please see the related question for detail on how this is used to locate an earthquake epicenter.Geologists use seismic waves to locate an earthquake's epicenter.
Geologists use the difference in the arrival times of P waves and S waves at a seismograph to determine?
The distance to the epicenter
What do scientists use to calculate the distance from the seismograph station to the focus?
The diffrence in arrival times of P and S waves.
What is the fewest number of seismographic stations that must record the arrival time of P and S-waves?
That depends on what information you are interested in. A single seismic station station measuring the P and S-wave arrival time can make an estimate of the distance to the epicentre of the earthquake and based on this information and the amplitude of the measured waves can make an estimate of the earthquakes magnitude, whereas a minimum of three stations are needed to find the location of the epicentre. For more information on this process, please see the related question.
Do Geologists use the difference in the arrival time of P and S waves at a seismograph to determine the magnitude of an earthquake?
No. Seismologists (a type of geophysicist) use the difference in the arrival time of P and S waves to estimate the distance from the seismometer station to the epicentre of the earthquake.
How many bus terminal stations are in London?
The London Underground (the tube), has 11 lines and 270 stations.
Where would one see the departure times for trains?
Many train stations have arrival and departure boards posted throughout the station that can easily be located and checked for times. Some stations also maintain web pages that contain arrival and departure times for the day's trains.
Can the s-p time method be used with one seismograph station to locate the epicenter of an earthquake?
The first step in this method is to collect several seismograms of the same earthquake from different locations. Then, the seismograms are placed on a time-distance graph. The seismogram tracing of the first P wave is lined up with the P-wave time-distance curve, and the tracing of the first S wave is lined up with the S-wave curve.The distance of each station from the earthquake can be found by reading the horizontal axis. After finding out the distances, a seismologist can locate an earthquake's epicenter.-New Boyz
How is the fact that P-waves travel faster that S-waves used to determine the distance of an earthquake epicenter from an seismograph station?
Using the difference in their arrival times and an estimate of their velocity of propagation you can calculate the distance of the earthquake epicentre from the seismometer recording station. If you do this from three or more different seismometer stations you can triangulate it's position. For more information please see the related question.
What is the fewer number of seismographic stations that must record the arrival time of waves in order for the epicenter of an earthquake to be located?
3
