an earthquake
forms when two {crustal} lithosphere plates move apart.
Usually along rift valleys I believe.
an earthquake
Molten magma from the mantle rises at the top oceanic ridge, cools and solidifies, continually forming a crustal plate. Hundreds to thousands of miles from the ridge the plate moves downward into the mantle at the contact with another plate and melts. The continuous process resembling a large "conveyor belt" moves the crustal plate a few centimeters each year.
At divergent boundaries, two plates move apart from each other and the space that this creates is filled with new crustal material sourced from molten magma that forms below.
a fault
When crustal plates move toward each other, they can form convergent boundaries where one plate is forced beneath the other in a process called subduction. This can result in the formation of mountain ranges, deep ocean trenches, and volcanic activity in the area.
A long, linear crack that forms as two tectonic plates move apart is called a mid-ocean ridge. This type of boundary is where new oceanic crust is created as molten rock rises up from the mantle and solidifies along the spreading center. Over time, as the plates continue to move apart, the new crust forms a continuous ridge on the ocean floor.
beacause it is moving
It forms a hole but new crust is formed.
by bubbling hot magma in the earth's inner core, erupting from volcanoes and causing earthquakes which cause the crustal plates to move.
Plates move apart on divergent plate boundaries.