Answer: Deep Focus
Explanation:
A Deep focus earthquakes is one that occurs deeper beneath the subduction zone called Wadati-Benioff zone having a focus greater than 300 km deep and magnitudes greater than 6, Because of these, they can only be measured using the Moment Magnitude scale which can measure earthquakes with magnitude over 10
Here there is a forceful collision of the tectonic plates as they slide over each other within the continental and oceanic plates boundaries causing the release of great energy,with extreme heat and pressure causing the rocks to flow instead of breaking and faulting of the rocks
Deep focus earthquakes are very dangerous although occurring 20 - 30 years along a fault line are responsible for the many destructive tsunamis that happen.
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Answer: is constant
Explanation:
In order to analyze the velocity of the stars within a galaxy, the <u>galaxy rotation curves</u> (developed by the American astronomer Vera Rubin) are used. These graphs are elaborated as a scatter diagram in which the orbital velocity of the stars present in a galaxy is represented on the Y axis and the distance of these stars to the center of the galaxy on the X axis.
Thanks to this diagram, it has been possible to observe a characteristic behavior in the rotation speed of the stars (and gas) present in the galaxies, which differs from the rules of the orbital movement of the planetary systems postulated by Newton and Kepler.
This means that in these galaxy rotation curves it has been observed that the rotation speed of stars and gas is "constant", regardless of the distance to the center of the galaxy. This discrepancy and these results were then used to demonstrate the existence of dark matter in the universe.
Answer:
When an oceanic plate converges with a continental plate, the oceanic crust will always subduct under the continental crust; this is because oceanic crust is naturally denser. Convergent boundaries are commonly associated with larger earthquakes and higher volcanic activity
