Solid Earth Sciences (S)
Session Sub-categoryComplex & General (CG)
Session IDS-CG43
TitleShallow and intermediate depth intraslab earthquakes: seismogenesis and rheology of the slab
Short TitleIntraslab earthquakes
Main Convener NameSaeko Kita
AffiliationInternational Institute of Seismology and Earthquake Engineering, BRI
Co-Convener 1NameTomohiro Ohuchi
AffiliationGeodynamics Research Center, Ehime University
Co-Convener 2NameMarina Manea
AffiliationComputational Geodynamics Laboratory, Geosciences Center, National Autonomous University of Mexico
Co-Convener 3NameKurama Okubo
AffiliationNational Research Institute for Earth Science and Disaster Resilience
Session LanguageE
ScopeAt depths exceeding 30 km, where the pressure reaches > 1GPa, many regular earthquakes and slow slip events occur within/above subducting slabs. It remains to be fully revealed that the intraslab earthquakes at such high pressures are described with frictional processes commonly used to model crustal earthquakes. It has long been believed that breakdown of hydrous minerals and pressure-induced phase transitions of major minerals could trigger intraslab earthquakes. Aqueous fluid released from the hydrous minerals seem to be related with slow slip events and some earthquakes. However, our understanding of the link between such "microscopic" phenomena and "macroscopic" earthquakes is still poor. The purpose of this session is to share constraints and advances in the understanding of the mechanisms controlling the occurrence of intraslab earthquakes. We seek to formulate future directions of the interdisciplinary study of the occurrence of intraslab earthquakes from the viewpoint of seismology, geodynamics and mineral physics. We welcome presentations from a wide variety of scientific disciplines, including observational and theoretical seismology, seismotectonics, geodynamics, mineral and rock physics, geology, and numerical modeling. Studies related to the thermal and tectonic structures of the subducting slab are also welcomed.
Presentation FormatOral and Poster session
Joint with
Co-sponsored-