What does the asthenoshere mean?

The asthenosphere is a semi-fluid layer of the Earth's mantle located beneath the lithosphere, extending from about 100 to 700 kilometers below the surface. It is characterized by its ability to flow slowly and deform under pressure, allowing tectonic plates in the lithosphere to move. This layer plays a crucial role in plate tectonics, contributing to processes such as continental drift and volcanic activity. Its properties are affected by temperature and pressure, making it essential for understanding geological dynamics.