What information can scientists obtain by studying seismographs from different locations?
A.the location and strength of the earthquakeB.when the next earthquake is going to happenC.the direction of motion of tectonic platesD.the amount of damage caused by an earthquake
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Hello I am here to help. The answer is A. :D I am a student and took this test weeks ago!
Each of a pair of seismic stations can determine the direction a seismic wave came from, and if that data is plotted on a map, the location where the lines cross will be the epicenter of the quake.
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No. Without a 3rd peice of data from another station, there will always be 2 different possible locations of the epicenter. You must have 3 seismographs to collect the data.
You would need at least three different seismometer locations to triangulate an earthquake's location.
Scientists use seismographs to measure thousands of earthquakes, large and small, every year. Some seismographs can detect ground movements as small as one hundred-millionth of a centimeter. The recording produced by a seismograph is called seismogram. By studying seismograms, scientist can determine the locations and strengths of earthquakes.
Scientists learn about the layers deep within the Earth's crust by studying how seismic waves travel through the Earth. If there is an earthquake somewhere, seismographs in many locations will record it. By looking at the time of arrival of the main set of waves, and how the frequencies of the waves are arranged within the set, scientists can learn about the density and other properties of the layers. The relative differences in arrival times of the S and P seismic waves at several recording stations tell scientists about the different speeds those waves were traveling at, which in turn gives information about the density of the material the layer is made of, and how thick the layer is in several directions. [scienceline.ucsb.edu]
If the tsunami is the result of an earthquake, then scientists take three locations that the earthquake hit. They find a radius by finding out how long it took for P waves and S waves to hit the land. Once they've drawn circles, calculated by the radius, around all three locations there is an epicenter. This is where all three circles intersect. They then have seismographs that show the damage of the earthquake by a Moment Magnitude Scale. Then they predict that a tsunami will follow shortly after and they warn the countries in danger.
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