T21C:
Interpreting the Geometry, Rheology, and Deformation Mechanisms of the Slow Earthquake Source II Posters

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Session ID#: 12649

Session Description:
Over the last decade, slow fault slip phenomena such as slow slip, tremor, and low and very-low frequency earthquakes have been observed in an increasing number of geographical locations and tectonic settings, over an increasing range of pressure-temperature conditions. To better understand the mechanism(s) of slow earthquakes, we suggest a need to compare and contrast data sets from a range of disciplines, including, but not limited to, observational geodesy and seismology, field and microstructural fault zone studies, rock deformation experiments, and numerical models. In particular, we welcome interdisciplinary presentations that address the thickness and geometry of the deforming zone, constrain source parameters, and/or identify likely material properties, possible deformation mechanisms, and permissible fault zone friction and rheology parameters.
Primary Convener:  Ake Fagereng, Cardiff University, Cardiff, CF24, United Kingdom
Conveners:  Matt Ikari, MARUM - University of Bremen, Bremen, Germany, Yoshihiro Ito, Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan and Kohtaro Ujiie, University of Tsukuba, Tsukuba, Japan
Chairs:  Ake Fagereng, Cardiff University, Cardiff, CF24, United Kingdom, Yoshihiro Ito, Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan, Kohtaro Ujiie, University of Tsukuba, Tsukuba, Japan and Matt Ikari, MARUM - University of Bremen, Bremen, Germany
OSPA Liaison:  Ake Fagereng, Cardiff University, Cardiff, CF24, United Kingdom
Co-Organized with:
Tectonophysics, Geodesy, Mineral and Rock Physics, and Seismology

Cross-Listed:
  • G - Geodesy
  • MR - Mineral and Rock Physics
  • S - Seismology

Proposed Co-Organized Session with:
  • G - Geodesy
  • MR - Mineral and Rock Physics
  • S - Seismology
Index Terms:

1207 Transient deformation [GEODESY AND GRAVITY]
7215 Earthquake source observations [SEISMOLOGY]
8118 Dynamics and mechanics of faulting [TECTONOPHYSICS]
8163 Rheology and friction of fault zones [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Distribution of low frequency earthquakes accompanying very low frequency earthquakes in the Ryukyu Trench (126953)
Mamoru Nakamura, University of the Ryukyus, Okinawa, Japan
Sequence of slow slip events and low frequency earthquakes in the shallow part of the Nankai Trough seismogenic zone observed by seafloor observation network. (197590)
Eiichiro Araki1, Demian M Saffer2, Achim Kopf3, Akiko Toh4, Satoshi Ide5, Masaru Nakano6, Toshinori Kimura6 and Yuya Machida6, (1)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Research Institute for Marine Geodynamics, Yokosuka, Japan, (2)Penn State University, Department of Geosciences, University Park, PA, United States, (3)University of Bremen, Bremen, Germany, (4)Institute of Earth Sciences Academia Sinica, Taipei, Taiwan, (5)The University of Tokyo, Department of Earth and Planetary Science, Bunkyo-ku, Japan, (6)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
Frictional Properties of the Nankai Trough Accretionary Mud Samples Collected from 1000–3000 mbsf at IODP Site C0002 (121813)
Kyuichi Kanagawa, Koki Hoshino, Kosuke Abe and Michiyo Sawai, Chiba University, Earth Sciences, Chiba, Japan
Combined analysis of vitirinite reflectance and U-Pb dating of detrital zircon on cuttings from the Nankai accretionary prism (175158)
Rina Fukuchi1, Asuka Yamaguchi2, Yuzuru Yamamoto3, Hisatoshi Ito4 and Juichiro Ashi1, (1)Atmosphere and Ocean Research Institute University of Tokyo, Tokyo, Japan, (2)Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan, (3)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (4)CRIEPI, Chiba, Japan
Evaluation of frictional melting on the basis of trace element analyses of fault rocks (153262)
Tsuyoshi Ishikawa, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan and Kohtaro Ujiie, University of Tsukuba, Tsukuba, Japan
Friction behavior for clay minerals during dehydration process: implication for unstable friction at shallow portion along subducting plate (175037)
Tatsuro Kubo, Hiroshima University, Earth and Planetary Systems Science, Higashi-Hiroshima, Japan and Ikuo Katayama, Hiroshima University, Higashi-Hiroshima, Japan
Plate-rate laboratory friction experiments reveal potential slip instability on weak faults (130948)
Matt Ikari, MARUM - University of Bremen, Bremen, Germany and Achim Kopf, MARUM-Center for Marine Environmental Sciences, Bremen, Germany
Frictional ‘non-aging’ of fault mirror surfaces?: Insight from friction experiments on Carrara marble (121960)
Yohan Park, Korea University, Seoul, Korea, Republic of (South), Jin-Han Ree, Korea University, Department of Earth and Environmental Sciences, Seoul, Korea, Republic of (South) and Takehiro Hirose, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kochi Institute for Core Sample Research, Nankoku, Japan
Effect of humidity and interlayer cation on frictional strength of montmorillonite (169944)
Hiroshi Tetsuka1, Ikuo Katayama2, Hiroshi Sakuma3 and Kenji Tamura3, (1)Hiroshima University, Earth and Planetary Systems Science, Higashi-Hiroshima, Japan, (2)Hiroshima University, Higashi-Hiroshima, Japan, (3)National Institute for Materials Science, Tsukuba, Japan
Characteristics of frictional properties’ dependency on afterslip propagation speed (127189)
Dr. Keisuke Ariyoshi1, Toru Matsuzawa2, Akira Hasegawa3, Ryota Hino2 and Takane Hori4, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)Tohoku University, Sendai, Japan, (3)Tohoku University, Graduate School of Science, Sendai, Japan, (4)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan
Velocity- and slip-dependent weakening on the Tohoku plate boundary fault: shallow coseismic slip facilitated by foreshock afterslip (132606)
Yoshihiro Ito, Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan, Matt Ikari, MARUM - University of Bremen, Bremen, Germany, Kohtaro Ujiie, University of Tsukuba, Tsukuba, Japan and Achim Kopf, MARUM-Center for Marine Environmental Sciences, Bremen, Germany
Geological perspectives of shallow slow earthquakes: insights from exhumed accretionary complexes in southwest Japan and New Zealand (145870)
Kohtaro Ujiie1, Ake Fagereng2, Yoshihiro Ito3, Kazuaki Ohta4, Takahiro Kinoshita1 and Satoshi Katakami5, (1)University of Tsukuba, Tsukuba, Japan, (2)Cardiff University, Cardiff, CF24, United Kingdom, (3)Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan, (4)National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan, (5)Graduate School of Science, Kyoto University, Kyoto, Japan
Preferred-rupture propagation to the hangingwall of the shallow part of the out-of-sequence thrust: Ishido Fault in Boso Peninsula, central Japan (143366)
Yuzuru Yamamoto, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Mayuko Fukuyama, Akita University, Akita, Japan, Kohtaro Ujiie, University of Tsukuba, Tsukuba, Japan, Takehiro Hirose, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kochi Institute for Core Sample Research, Nankoku, Japan, Yohei Hamada, JAMSTEC, Kochi Institute for Core Sample Research, Nankoku, Japan, Manami Kitamura, Hiroshima University, Higashi-Hiroshima, Japan and Nana Kamiya, Doshisha University, Department of Environmental System Sciences, Kyoto, Japan
The geologic record of slow earthquakes in the South Fork Mountain Schist, northern California Coast Ranges (170398)
William Lamborn Schmidt, University of Southern California, Los Angeles, CA, United States and John P Platt, University of Southern California, Earth Sciences, Los Angeles, CA, United States
Does Slow Slip and Tremor Require High Fluid Pressure? Thoughts From Observations in Retrograde Faults (127408)
Ake Fagereng, Cardiff University, Cardiff, CF24, United Kingdom, Johann F.A. Diener, University of Cape Town, Department of Geological Sciences, Cape Town, South Africa and Christian Stenvall, Cardiff University, School of Earth and Ocean Sciences, Cardiff, CF24, United Kingdom
Constraining the velocity structure near the tremorogenic portion of the San Andreas Fault near Parkfield, CA using Ambient Noise Tomography (146062)
Rachel C Lippoldt1, Dr. Robert W Porritt, PhD2 and Charles G Sammis1, (1)University of Southern California, Earth Sciences, Los Angeles, CA, United States, (2)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States
Thermal regime, slab dehydration and seismicity distribution beneath the Hikurangi subduction zone based on 3D simulation (145921)
Yingfeng Ji, Kobe University, Kobe, Japan and Shoichi Yoshioka, Kobe University, Research Center for Urban Safety and Security, Kobe, Japan
Numerical simulations of temperature, dehydration, and flow fields associated with subduction of the Cocos plate, and its relation to the occurrence of interplate seismic events in southern Mexico (169525)
Nobuaki Suenaga1, Yingfeng Ji1, Shoichi Yoshioka2, Marina Manea3 and Vlad Constantin Manea4, (1)Kobe University, Kobe, Japan, (2)Kobe University, Research Center for Urban Safety and Security, Kobe, Japan, (3)UNAM National Autonomous University of Mexico, Mexico City, Mexico, (4)Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
Hydro-Mechanical Modelling of Slow Slip Phenomena at the Subduction Interface. (120595)
Claudio Petrini, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, Taras Gerya, ETH Zurich, Department of Earth and Planetary Sciences, Zurich, Switzerland, Claudio Madonna, Structural Geology & Tectonics Group, Dept. of Earth & Planetary Sciences, ETH Zürich, Zürich, Switzerland and Ylona van Dinther, Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
Numerical modeling of short-term slow slip events in the Shikoku region considering the effect of earth tides and plate configuration (153541)
Takanori Matsuzawa, National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan, Yoshiyuki Tanaka, University of Tokyo, Department of Earth and Planetary science, Bunkyo-ku, Japan and Bunichiro Shibazaki, Building Research Institute, Ibaraki, Japan
A Trial for Detecting the Temporal Variation in Seismic Velocity Accompanied by a Slow Slip Event, Using Seismic Interferometry of Ambient Noise (157552)
Miyuu Uemura, Kyoto University, Kyoto, Japan, Yoshihiro Ito, Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan, Kazuaki Ohta, National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan, Ryota Hino, Tohoku University, Sendai, Japan and Masanao Shinohara, NIED, ERI, The University of Tokyo, Tsukuba, Japan

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