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In which order will seismic waves from an earthquake arrive?
I don't know ok
How many additional seismic stations must report seismogram information in order to located this earthquake?
2
How many seismic stations must report seismogram information in order to locate an earthquake?
At least three must do so to locate it unambiguously (two stations can narrow it down to one of two locations, which may be good enough if one of them is on a known fault line and the other is nowhere near one).
What are the first seismic waves to arrive at a seismic station?
P-waves are the first to arrive at a seismic station. There are two major types of waves: Body waves and surface waves. P-waves and S-waves come under Body waves while Love and Rayleigh waves come under surface waves. Body waves are much faster than the Surface waves. Waves are detected in the following order: P, S, Love and Rayleigh
Is the process used by seismologists to locate earthquake epicenters perfect?
No, it is an imperfect process. Mainly because in order to locate the earthquake epicentre it is necessary to calculate the distance of the epicentre from the seismometer stations that recorded the seismic waves. To do this, it is necessary to know the velocity of the P and S seismic waves through the Earth's crust. This velocity is in turn dependent on the density and elastic moduli of the material that the seismic waves travel through. As the Earth is formed from a very wide variety of rocks that have different properties and have undergone differing levels of deformation as well as chemical and other physical changes, the relevant properties can be very variable. Because of this, seismologists cannot know the exact nature of all the material that the seismic waves must travel through and therefore have to create simplified models of the ground in order to estimate the seismic wave speed and in turn estimate the distance to the epicentre. This approximation and simplification will introduce an error into the result and this will mean that the position of the epicentre will be approximate. Normally the margin of error will be quoted along with the best estimate of the location. Please see the related questions for further information on seismic wave velocity and how seismologists estimate the location of an earthquake's epicentre.
In which order will seismic waves from an earthquake arrive?
I don't know ok
How many additional seismic stations must report seismogram information in order to located this earthquake?
2
How many seismic stations must report seismogram information in order to locate an earthquake?
At least three must do so to locate it unambiguously (two stations can narrow it down to one of two locations, which may be good enough if one of them is on a known fault line and the other is nowhere near one).
Where are seismographs located?
At many different earthquake centers. When an earthquake happens the tree nearest earthquake centers record the magnitude and intensity of the seismic waves produced by the earthquake in order to find the origin or epicenter
What are the first seismic waves to arrive at a seismic station?
P-waves are the first to arrive at a seismic station. There are two major types of waves: Body waves and surface waves. P-waves and S-waves come under Body waves while Love and Rayleigh waves come under surface waves. Body waves are much faster than the Surface waves. Waves are detected in the following order: P, S, Love and Rayleigh
What are the identified earthquake generators in Philippine archipelago?
Seismic generators have been set in the Philippine Archipelago. This has been done in order to predict the approximate time that an earthquake may strike.
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
What is the fewest number of seismographic stations that record the arrival time of P and S waves in order to for the epicenter of an earthquake to be located?
3
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
Why doesn't the triangulation method give an exact location of an earthquake's epicenter?
In order to locate an earthquake's epicentre it is necessary to calculate the distance of the epicentre from the seismometer stations that recorded the seismic waves. To do this, it is necessary to know the velocity of the P and S seismic waves through the Earth's crust. This velocity is in turn dependent on the density and elastic moduli of the material that the seismic waves travel through. As the Earth is formed from a very wide variety of rocks that have different properties and have undergone differing levels of deformation as well as chemical and other physical changes, the relevant properties can be very variable. Because of this, seismologists cannot know the exact nature of all the material that the seismic waves must travel through and therefore have to create simplified models of the ground in order to estimate the seismic wave speed and in turn estimate the distance to the epicentre. This approximation and simplification will introduce an error into the result and this will mean that the position of the epicentre will be approximate. Normally the margin of error will be quoted along with the best estimate of the location. For more information on the methodology used for the triangulation of earthquake epicentres and the parameters that affect the velocity of seismic waves, please see the related questions.
Is the process used by seismologists to locate earthquake epicenters perfect?
No, it is an imperfect process. Mainly because in order to locate the earthquake epicentre it is necessary to calculate the distance of the epicentre from the seismometer stations that recorded the seismic waves. To do this, it is necessary to know the velocity of the P and S seismic waves through the Earth's crust. This velocity is in turn dependent on the density and elastic moduli of the material that the seismic waves travel through. As the Earth is formed from a very wide variety of rocks that have different properties and have undergone differing levels of deformation as well as chemical and other physical changes, the relevant properties can be very variable. Because of this, seismologists cannot know the exact nature of all the material that the seismic waves must travel through and therefore have to create simplified models of the ground in order to estimate the seismic wave speed and in turn estimate the distance to the epicentre. This approximation and simplification will introduce an error into the result and this will mean that the position of the epicentre will be approximate. Normally the margin of error will be quoted along with the best estimate of the location. Please see the related questions for further information on seismic wave velocity and how seismologists estimate the location of an earthquake's epicentre.
What is the fewest number of seismographic stations that must record the arrival time of P and S waves in order for the epicenter of an earthquake to be located?
3
