From SEG Wiki
Jump to navigation Jump to search

{{#category_index:A|asthenosphere}} (as thēn’ ∂ sfer,) A yielding zone in the Earth’s mantle involved in isostatic compensation and in plate-tectonic movements. The asthenosphere lies between the nearly rigid lithosphere and above the mesosphere; it is approximately 200 km thick, has high attenuation of seismic energy (low Q), and little strength. See Figure E-1.