0
shadow zone
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
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.
Why do tsunamis grow into larger waves as they come towards land?
Tsunamis are very wide waves while out at sea. As they approach land, the depth of the sea decreases and the base of the front of the wave begins to catch on the sea bed. This slows the base of the wave, but the top is still moving fast. This causes the front of the wave to get steeper and the water to pile up behind the front edge. The waves gets taller/higher/bigger.When the wave reaches land it is therefore much larger than it was our at sea and because it is such a wide wave, once it reaches land the depth of water behind the front caries on and on. It comes in like a tide rather then as a breaking wave.
How wide is the crust?
how wide is the earths crust
What events on earths surface tend to occur in the region more frequently then in other regions of the earth why do they occur here?
Volcanoes, hence the "fire." The collision of tectonic plates around the Pacific rim triggers volcanoes and earthquakes, and sometimes tsunamis (which can spread quickly over wide areas of ocean).
How wide is the mantle?
the mantle is 2900 kilometers wide.
Do waves that are wide have lots of energy?
sound waves
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 a time belt is 15 degrees of latitude wide?
A time belt, or zone, is 15 degrees of longitude wide.
Is there any reason to wear a wide belt?
There are many reasons why one would want to wear a wide seat belt in a car when driving. The biggest reason why one would wear a wide seat belt is if they were too fat for a normal seat belt.
A wide range of energy waves that radiate from the sun?
Electromagnetic radiation.
Why no seismic waves detected at the shadow zone?
In shadow zone, seismograph does not record signals. For P-wave it is b/w 104-145 degress.These earthquake waves exhibit same properties as other waves like reflection, refraction etc.As core has denser matter so P-waves will bend inward and hences they will form a shadow zone. S-waves don't pass through liquid phase, core. So, shadow zone is larger here.
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 a great tongue twister for Louisiana?
The waves of the waving wide waves are waiting for William's wiggling
What can the wide belt sander used for?
A wide belt sander has many different uses when it comes to needing to sand something. A belt sander can be used to sand down piece of wood that you need to get a nice curve on.
How are emails received?
Emails are received through the internet or the world wide web.
What is a wide-open primary?
a wide open primary. is when they remove the primary cover .and they put a belt instead of the chain.
What is wide open primary?
a wide open primary. is when they remove the primary cover .and they put a belt instead of the chain.
