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How are three seismograms used to find the location of an earthquake epicenter?
Three seismographs are needed. A circle is drawn from each of the three different seismograph locations, where the radius of each circle is equal to the distance from that station to the epicenter. The spot where those three circles intersect is the epicenter (Figure 13.12).
What is the epicenter of an earthquake called?
The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus.
Which part of this seismogram is used to find the distance to the epicenter of the earthquake?
One seismogram indicates the distance to the epicenter. This is determined by the P-and S-wave arrival times. If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. If a quake is far from the seismograph, the P-waves arrive long before the S-waves.
Why do we need 3 stations data to locate the epicenter of the earthquake?
At least 3 earthquake recording stations are required to find the location of the earthquake epicenter. A single recording station can only calculate distance, but not direction; to cover all possibilities, a complete circle is drawn around that station.
How many seismograms are needed to locate the earthquake epicenter?
Seismic stations detect earthquakes by the tracings made on seismographs. Tracings made at three separate seismic stations are needed to locate an earthquake epicenter.
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How do you calculate the epicenter of an earthquake?
Measure the difference in arrival times between the first shear (s) wave and the first compressional (p) wave, which can be interpreted from the seismogram. Multiply the difference by 8.4 to estimate the distance, in kilometers, from the seismograph station to the epicenter.
How do you find the epicenter of 3 points?
Finding the Epicenter Determine the epicenter distance from three different seismographs. The longer the time between the arrival of the P-wave and S-wave, the farther away is the epicenter. So the difference in the P- and S-wave arrival times determines the distance between the epicenter and a seismometer.
How do you find the epicenter?
Scientists use triangulation to find the epicenter of an earthquake. When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects. Every earthquake is recorded on numerous seismographs located in different directions.
Where is the epicenter of the earthquake located * 1 point it is located above the focus it is located below the focus it is located on the lower mantle It is located at the core?
Epicenter is the location on the surface of the Earth directly above where the earthquake starts. Focus (aka Hypocenter) is the location in the Earth where the earthquake starts.
Where are seismograms located?
A seismograph is securely mounted onto the surface of the earth so that when the earth shakes, the entire unit shakes with it EXCEPT for the mass on the spring, which has inertia and remains in the same place.
locating the epicenter of an earthquake lab answers
The Science of Earthquakes | U.S. Geological Survey
An earthquake is what happens when two blocks of the earth suddenly slip past one ... directly above it on the surface of the earth is called the epicenter.
While earthquake locations are normally done with a computer that can quickly determine the paths of seismic waves through the Earth to many seismic stations, ...
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