Answer:
Slow slip, silent
Explanation:
Slow slip refers to earthquakes that occur ~25 miles below the earth's surface, which are called Silent quakes. Detecting the onset of such events can provide a warning that a large earthquake is imminent
Seafloor mapping during WWI and the Cold War had revealed the details of the physical structure of the ocean ridge system, and discovery of magnetic stripes on the ocean floor was the crucial turning point in development of plate tectonic theory. when deep-sea line soundings (bathymetric surveys) were routinely made in the Atlantic and Caribbean.
The movement of material due to differences in density is called Convection.
