Alternative hypothese for the origin of the ultra-low velocity zones

Jie Li, University of Michigan Ann Arbor, Department of Earth and Environmental Sciences, Ann Arbor, MI, United States, Jiachao Liu, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, Rostislav Hrubiak, CeSMEC-Mechanical & Materials, Miami, FL, United States and Jesse Smith, HPCAT, Carnegie Institution of Washington, Argonne, IL, United States