What is earthquake?
drop pressures that cause lasting changes in the Earth's crust.
Many of the
people living in Iran had experienced an earthquake. When we feel
something violent or something slow like rolling motion of the
earth if we are at sleep, we will wake up or if we are at home and
watching television or driving in the street when an earthquake
happens, we will amaze.
What is the reason for earthquake?
Why feel of earthquakes are so
different from the other? What is earthquake?
cause dropping pressure and these are the Earth's natural means.
While Earth's plates moving in the opposite direction of each
other, a great amount pressure will impose to lithosphere. The
lithosphere breaks when the pressure is great. For example imagine
you have a pencil. If you give a force to both ends of it you
would sea that pencil stoop. When you give enough force, the
pencil would break in the middle part, and the force that you had
imposed it would dropping. The action of the Earth's crust is
exactly like this .When the plates move,they stress on each other
and themselves. While this pressures and stresses is great enough,
the crust would break. After the crust break, the pressure will
decrease as energy t moves among the Earth's layers in form of
waves, and earthquake happen.