Describe step by step how the epicenter of an earthquake can be located?

Question

HELP ME!

Answer 1

by measuring seismic ways from around the world. most will travel trough the crust, magma core, magma , crust again to get to seismic sites all over the world. trough years of records they can determine how far it was from each site and tell us the epicenter was xmiles underground above these coordinates above ground

Answer 2

I wish I could give you a step-by-step, but I am not a geologist. Maybe one will see your question.

However, I did get this out of Wikipedia, and it may be of some help:

"The epicenter or epicentre (ancient Greek: επίκεντρον) is the point on the Earth's surface that is directly above the point where an earthquake or other underground explosion originates. The epicenter is directly above the hypocenter, the actual location of the energy release inside the earth. Seismic waves propagate spherically out from the hypocenter. Seismic shadowing occurs on the opposite side of the Earth from the earthquake epicenter because the liquid outer core absorbs the transverse or shear waves (S-waves), and refracts the longitudinal or compressional (P-waves).

After an earthquake has occurred, geologists can find out where the epicentre was located by looking at different seismograms."
http://en.wikipedia.org/wiki/Epicenter

Answer 3

There are two types of waves that occur during an earthquake, p waves and s waves. These waves travel at different speeds. By timing the arrival times of the two waves, you can calculate how far away the earthquake was. Draw a circle around your seismograph to where it might have occured. Now add the circles calculated by 2, 3 , or more other seismographs. Where the circle all cross each other is the center of the earthquake.

For greater detail, use the link below.

Answer 4

ok first you will desire to have an earthquake. Then as quickly as the earth quake occurs one middle that tracks earthquakes, will experience it. After that the 1st middle they might desire to call 2 different centers, if the different 2 centers have felt it they'll say something like 'our records say that the earthquake replaced into x miles removed from our middle.' as quickly as the 1st earthquake middle has recorded the different 2 centers they use a map to allure to a circle around the three earthquake centers. whilst they have accomplished that they use the 'x miles' away to allure to a line the place the three strains connect is the place the earthquake has happened.

Answer 5

Look at my slide show at URL
http://asia.pg.photos.yahoo.com/ph/quake
You will know from locating epicentre slide.Minimum three seismograph pictures are required from three different directions. By calculating the arrival time of s wave - P wave multiplied by 8 will give you the distance of epicentre in K/M, Draw circles to that distance from each station. All the three circles will meet at a single point. That is the focus of the earthquake.Epicentre is directly above the focus point on earth surface.

Answer 6

It is exactly the same as taking a navigational fix or using the global positioning system.

there are many different seismology recording stations around the world. All you have to do is draw a line from each to where they show the seismic waves to be coming from. Where they meet is the epicentre.

Answer 7

1. measure the length of a earthquake where it starts
2. measure the lenght of a earthquake when it starts to shake