Question

What does frequent earthquakes suggest about the movement of the lithosphere?what does the concentration of earthquake activities to certain part of the earth tell us about earthquake?

Answer 1

Answer:

Explanation:2 magnitude

Answer 2

Answer:

An earthquake is an intense shaking of the Earth’s surface. The shaking is caused by movements in Earth’s outermost layer

Explanation:

• Although the Earth looks like a pretty solid place from the surface, it’s actually extremely active just below the surface.

• The Earth made up of four basic layers: a solid crust, a hot, nearly solid mantle, a liquid outer core, and a solid inner core.

• The solid crust and top, stiff layer of the mantle make up a region called the lithosphere. The lithosphere isn’t a continuous piece that wraps around the whole Earth like an eggshell. It’s actually made up of giant puzzle pieces called tectonic plates.

• The Earth's lithosphere is a patchwork of plates in slow but constant motion caused by the release to space of the heat in the Earth's mantle and core.

• In subduction zones, where older and colder oceanic crust descends beneath another tectonic plate, Deep focus earthquakes may occur at much greater depths (up to seven hundred kilometers).

• These are earthquakes that occur at a depth at which the subducted lithosphere should no longer be brittle, due to the high temperature and pressure.

• The concentration of earthquakes along narrow fault zones between the plates tells us that plates move relative to each other and that the motion is often focused along narrow boundaries between them.

Concentration of earthquakes in narrow, interconnected belts.

Concentration of volcanism in narrow, interconnected belts.