Asthenosphere, considered to be a zone on the mantle of the Earth, lies beneath the lithosphere. This is believed to be a place where hotness is apparent. The same is also true with fluid. This is not the case for lithosphere, which makes it really different. Basically, most of the Asthenosphere facts would say that this Asthenosphere extends from like 100 km, or 60 miles to a maximum of 700 km, which is 450 miles. Its heat, coming from the deepest layer of the Earth, is understood to be keeping the malleability of asthenosphere. This lubricates undersides of the tectonic plates of the Earth. This would also allow movement to happen.
Convection currents have also generated too. These are now seen within the asthenosphere itself. This comes with the ability to push magma on an upward direction. This occurs through the spreading of the centers and even that of the volcanic vents. These are vital in order for the creation of a new crust to take place. Aside from these, the convection currents would also be responsible in stressing the lithosphere just above it. This is another. The cracking at some point may result to the manifestation of earthquakes. This might have been the case just according to the plate tectonics theory. The asthenosphere in its repository here is denser and older.
This asthenosphere would always be composed of solid rocks as layers. This is one of its qualities together with a vast amount of pressure. This is why they can heat the rocks, making it flow like that of a liquid. The rocks may also be of lesser dense. This is how it has always been as compared to that of the lithosphere. This would also allow tectonic plates which are in the lithosphere to move around the surface of the Earth. This happens as it usually floats. They would slowly flow like that of a liquid.
There are scientists who claim that the earthquake on the place may take place. However, it may just be beneath that of the lithosphere. The waves of the Earthquake may also travel. This occurs via Earth which changes speed all the time. The same is also true with direction when it comes to the altering of density of most rocks which are in the earth too. It is not just about rocks actually. This may also be realistic as it breaks apart. This is in deep earthquake and this may be caused by the breaking of rocks in the layer itself.
As for the rocks in its upper mantle, it may be rigid and solid. The rocks below can be flowing and they may be breaking apart too. They can sometimes rise just in the lithosphere and even in areas which are always in tectonic plates. They may separate as such. The decrease in pressure may also allow the rocks to be a part of the earth. This may also melt and even collect in most magma chambers. These are all separated for the eruption as most pillow basalt is lying within that of the ocean floors. These are all true.