In the North Atlantic, around Iceland, the level sits about 80m above the surface of the ellipsoid; in the Indian Ocean it sits about 100m below.
The spacecraft carries three pairs of precision-built platinum blocks inside its gradiometer instrument that sense accelerations which are as small as 1 part in 10,000,000,000,000 of the gravity experienced on Earth.
Aren't there studies that almost show that the core is iron?? Are there any studies to show that the core is of a plasma nature?
Redeye said: ... by this rationale the reason acoustic waves do not pass through the centre of the Earth is because there is nothing there.
Experiments have been conducted to find the variation of the velocity of an acoustic wave propagating through air plasma. It is found that the velocity of sound increases with increasing charged particle density in the plasma. Also it has been observed that as the frequency of the acoustic wave through the plasma increases, the perturbed variation in charged particle density and the electron-neutral atom elastic collision frequency remain constant as long as the frequency of the sound wave is less than the ionisation frequency of the plasma. For further increase in the wave frequency, equal to, or greater than, the ionisation frequency of the plasma, the change in the number density reduces to a minimum value while the elastic collision frequency of the plasma increases.
Maddogkull wrote:Aren't there studies that almost show that the core is iron?? Are there any studies to show that the core is of a plasma nature?
In the above model [better one below], I simply used the Earth's structure as scientists define it now. I replaced the Outer core with a cavity (I'll explain why later - because there is a sound reason for it). But the thing I changed was the structure of the Mantle. I wondered what would happen if density within a sphere did not increase uniformly as has been assumed. What if density actually DECREASES from a certain point onwards? You will notice all solid-earth seismology shows ray paths curving in a "U" back to the surface of the Earth. That is because density and pressure increases as you go deeper. But if, for some reason, density were to suddenly decrease, then the waves would curve in the opposite direction! I realised this, and you can see what then happens. In the middle of the Mantle, where density suddenly decreases, it causes seismic waves to travel around the cavity - right to the other side of the Earth!
Lesson #7: Deep Quakes may disprove the Solid Earth model. According to scientists, pressure increases with depth. According to their calculations the pressure is so great that between 70-150 Km down, all rock will begin to flow. Below 150 Km there is no known material which will not flow. Therefore, according to scientists, there can be no earthquakes with epicentres deeper than 150 Km - because it is IMPOSSIBLE!
But there are! Tens of thousands of Earthquakes have epicentres deeper than 150 Km. The histogram below [see site from Allyn's post above] shows some curious things. It shows that earthquakes occur right up to a depth of 300 Km down. The picture is somewhat consistent with science's expectations because there are less quakes with depth (though they do not stop at 150 Km as expected). Then a most curious thing happens, they increase in number up to a depth of 700 Km where they end. Scientists try to explain these quakes by invoking various possible strange properties of matter. Although each theory advanced so far has had problems with it.
What no scientist on Earth is willing to accept is that maybe gravity does not behave the way they believe it does! That histogram may be the proof that gravity does not behave as is expected at depth. Why can't scientists look at that histogram and see it for what it might be telling us? That histogram may be "stating" quite clearly that the Earth does not have those pressures inside and that it remains relatively cool down to incredible depths? Maybe that diagram is "telling us" that gravity does not behave at depths the way we are expecting. If that is so, then everything we think we know about the mass of the Earth may be wrong.
Note, gravity is a very weak force and even a bit of static electricity could produce an attraction far in excess of anything gravity could produce - but with a fraction of the mass. If that is the case, you don't need to worry about the Earth having to have a mass of 6 trillion tons [That should say 6,588,000,000,000,000,000,000,000 tons, or about 6.6 sextillion tons, or 6.6 x 10^24 tons]. It may weigh considerably less.
As final note, it may be that there are quakes deeper than 700 Km but they are so far away, and maybe the effects of gravity are so weak that they do not have enough force for us to detect them. Let me point out that seismologists have indeed speculated about the possible existence of "Silent Earthquakes" which ... remain undetected by our equipment.
Users browsing this forum: No registered users and 1 guest