Session outline
Solid Earth Sciences(S)
Session Sub Category Complex & General(CG)
Session ID S-CG20
Title Intermediate-depth and deep earthquakes: their origins and material properties of subducting slabs
Short title Intermediate-depth and deep earthquakes
Convener Name Keiko Kuge
Affiliation Department of Geophysics, Graduate School of Science, Kyoto University
Co-convener 1. Name Saeko Kita
Affiliation National Research Institute for Earth Science and Disaster Prevention
Co-convener 2. Name Alexandre Schubnel
Affiliation Ecole Normale Superieure, Laboratoire de Geologie, Paris, France
Co-convener 3. Name Geoffrey Abers
Affiliation Cornell University, Department of Earth and Atmospheric Sciences, New York, USA
International Symposium 'International Symposium' in addition to Scientific session.
Language English
Scope The cause of intermediate-depth and deep earthquakes, which occur in subducting slabs at depth ranging from 60 to 700 km, is not yet understood. Explaining the origin and the source processes of these earthquakes remains a big challenge in geoscience. Metamorphic reactions such as dehydration embrittlement, phase transitions, thermal runway, and other phenomena have been suggested as causing the mechanical instability. Laboratory and numerical experiments, seismic observations, exhumed samples and other data may provide new constraints on these earthquakes. Thermal, electromagnetic, seismic structure in subducting slabs may constrain the material properties where earthquakes take place. The occurrence of these earthquakes may also be driven by the dynamics of subducting slabs and their interaction with surrounding mantle.
A wide range of scientific approaches is essential in order to further constrain our understanding the nature of intermediate-depth and deep earthquakes. This session offers an opportunity to share results from various kinds of scientific studies and interdisciplinary studies associated with these earthquakes and their surroundings. We welcome presentations based on data analysis studies from local to global seismic networks, seismotectonics, laboratory experimental studies of rocks under high-pressure conditions, theoretical studies, geodynamics, thermal structure, electrical conductivity structure and numerical modeling.
Type of presentation Oral and Poster presentation
Invited papers Bhat Harsha S.(Institut de Physique du Globe de Paris), Kirby Stephen(United States Geological Survey), Okazaki Keishi(Department of Earth, Environmental and Planetary Sciences, Brown University), Zhan Zhongwen(Seismological Laboratory, California Institute of Technology)