SEGJ Technical Conference |
The 140th (2019 SPRING) SEGJ CONFERENCE
INTERNATIONAL CONFERENCE CENTER, WASEDA UNIV.,TOKYO, JAPAN
June 3 - 5, 2019
GENERAL INFORMATION VENUE | | | | International Conference Center, Waseda University, Tokyo, Japan | | | | | SCHEDULE | | | |
| Monday, June 3, 2019 | | | | Technical Sessions | Room No.1 (3F) | 10:30-17:10 | | | Technical Sessions | Room No.2 (3F) | 10:30-17:10 | | | Poster Core Time | Room No.3 (3F) | 17:10-18:40 | | | Exhibition | Room No.3 (3F) | 10:30-18:40 | | | | | | | Tuesday, June 4 2019 | | | | General Meeting | Room No.1 (3F) | 09:30-11:20 | | | Award Sessions | Room No.1 (3F) | 11:30-12:30 | | __Centennial Anniversary Events of Exploration Geophysics in Japan | | | Anniversary Sessions | Ibuka Masaru Memorial Hall (1F) | 13:30-15:50 | | | __Chair: | Toshiki WATANABE (NAGOYA University) | | | __Presentation(1):
| First Geophysical Exploration and Numerical Simulation of Seismic Saves Koichi SASSA (KYOTO University) | | | __Presentation(2):
| First Magnetic Exploration Buried under the Geological Controversy in the Meiji Era in Japan Shigeo OKUMA (SEGJ Chair, AIST) | | | __Presentation(3):
| Past and Future of Electrical Exploration Mutsuo TAKEUCHI (ECO 3D) | | | __Presentation(4):
| History of Electromagnetic Exploration in Japan Akira SAITOH (WASEDA University) | | | __Presentation(5):
| Centennial History of Seismic Exploration in Japan Yoichi OHTA (formaer JAPEX) | | | Executive Sessions | Ibuka Masaru Memorial Hall (1F) | 16:10-17:30 | | | __Chair:
| Seiichiro KURODA (National Agriculture and Food Research Organization) | | | __Presentation(1):
| Contribution to the Society of Underground Visualization Technology, Geophysical Exploration, More familiar to Japanese Living in a Disaster Nation! Koichi SUZUKI (HOKKAIDO University) | | | __Presentation(2):
| Struggling and Suffering to Make a TV Program more Attractive Mikio HAYASHI (Japan Broadcasting Corporation) | | | Banquet
| NAN TEI, Okuma Kaikan | 18:00-20:00 | | | | [Access Map to NAN TEI] | | | | Exhibition | Room No.3 (3F) | 09:40-13:30 | | | | | | | Wednesday, June 5, 2019 | | | | Technical Sessions | Room No.1 (3F) | 10:00-15:40 | | | Exhibition | Room No.3 (3F) | 10:00-15:10 |
REGISTRATIONPre-Registration and Onsite Registration are available. All payments must be made in JPY (Japanease Yen).Registered and Paid | Pre-Registration (Until May 20, 2019) | Onsite Registration | Conference Meeting | Member / Non-member | JPY 07,560-** | JPY 08,640-** | Student | JPY 03,780-** | JPY 04,320-** | Banquet (Evening on June 4) | Member / Non-member | JPY 05,400-** | JPY 06,480-** | Student | JPY 03,240-** | JPY 03,240-** |
**
| Pre-registrant will receive PAPER Proceedings at the reception of the conference. | **
| PAPER Proceedings can be purchased at a price of JPY 1,620-. |
EXHIBITIONLIST OF EXHIBITORS | | ACT Electronics Corp.
Geofive Co.,Ltd.
Hakusan Corporation
Raax Co.,Ltd.
Terra Corporation
ZZ Resistivity Imaging Pty. Ltd. | |
ADVERTISEMENTLIST OF ADVERTISEMENTS | | Geophysical Surveying Co., Ltd.(GSC)
ITOCHU Techno-Solutions Corporation (CTC)
Kawasaki Geological Engineering Co. Ltd.(KGE)
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ITEMS TO KNOW
TECHNICAL PROGRAMME |
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June 3, Room No.1 |
Session |
[Civil2] |
Chair |
Nobuto Yamada(NC Geophysical Survey) |
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Jun 3, 10:30-10:50 |
1) Estimation of underground cavity size by GPR spectrum
[Abstract]
*Tomohiro Nakamura, Tada-nori Goto(Graduate School of Engineering, Kyoto Univ.)
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Jun 3, 10:50-11:10 |
2) Anomaly detection of boundary between the surface asphalt layer and the concrete slab in road bridges using 2 GHz horn antennae
[Abstract]
*Kunio Aoike(OYO Corporation),Shogo Tanaka(Professor Emeritus of Yamaguchi Univ),Naoto Takase, Akio Matsuyama, Masaya Yamauchi, Tsutomu Toyoshima, Yoshinori Uno(OYO Corporation)
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Jun 3, 11:10-11:30 |
3) A case study of the corrosion risk of industrial water pipeline by investigation of soil using high-frequency AC resistivity measurement
[Abstract]
*Karin Manzawa, Takumi Ueda(Waseda Univ.),Motoharu Jinguuji, Toshiyuki Yokota(AIST)
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Jun 3, 11:30-11:50 |
4) High-frequency seismic surveys for imaging internal structure of a sabo dam damaged by a huge debris flow
[Abstract]
*Tomio Inazaki, Hiroshi Kisanuki, Takanori Ogahara, Takeshi Shimizu, Naoki Fujimura(PWRI)
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Jun 3, 11:50-12:10 |
5) The relationship between tensioning force and natural resonance frequency of ground anchors by mock-up experiments
[Abstract]
*Hideki Saito(Oyo),Mitsuru Yamazaki(Central Nippon Highway Engineering Nagoya),Atsushi Yashima, Kazuki Nawa, Yoshinobu Murata, Keizo Kariya(Gifu Univ.),Kunio Aoike, Kazunori Takahashi, Yoshinori Sone(Oyo)
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Session |
[Civil3] |
Chair |
Kosuke Chimoto(Tokyo Tech.) |
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Jun 3, 13:10-13:30 |
6) The application of geophysical method in offshore geotechnical investigation: Offshore inverse PS logging
[Abstract]
*Yusuke Kawasaki, Dai Nobuoka, Yoshikazu Matsubara, Takayuki Kujyuuro, Akesi Hiraide(OYO),Mitsuo Nagashima(RENOVA)
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Jun 3, 13:30-13:50 |
7) The application of geophysical method in offshore ground survey: Offshore microtremor array
[Abstract]
*Mikihiro Imai, Ikuzou Miyazaki, Dai Nobuoka, Yoshikazu Matsubara, Akesi Hiraide(OYO)
|
Jun 3, 13:50-14:10 |
8) Multi-streaming S-wave Sonde for S Wave Logging
[Abstract]
*Akira Kawakami, Masatoshi Akatsu, Heigo Suzuki(Chuo Kaihatsu Coop.)
|
Jun 3, 14:10-14:30 |
9) Near surface geophysical surveying at water-covered areas (Part 3): Comparative measurements in a dry season
[Abstract]
*Tomio Inazaki, Takanori Ogahara, Takayuki Kobayashi(PWRI)
|
Jun 3, 14:30-14:50 |
10) A study of "three dimensional High-Definition seismic tomography" for inclined structures
[Abstract]
*Rei Sato, Nobuto Yamada, Nobuhito Terashi(NC Geophysical Survey),Kazuo Hayashi, Susumu Sato, Jun Fujimoto(Chuden Engineering Consultants)
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Session |
[Disaster2 etc.] |
Chair |
Yoko Hasada(Daiwa Exploration and Consulting, ENAA) |
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Jun 3, 15:10-15:30 |
11) Comparison of different implementations of the free surface for foothill topography through SEM and FDM methods.
[Abstract]
*Nobuto Yamada, Rei Sato(NC Geophysical Survey),Christophe Barnes(University of Cergy-Pontoise, GIM-labs),Marwan Charara, Denis Sabitov(Skolkovo Institute of Science and Technology)
|
Jun 3, 15:30-15:50 |
12) Study on the outer wall inspection by noncontact acoustic inspection method using sound source mounted type UAV (II)
[Abstract]
*Tsuneyoshi Sugimoto, Kazuko Sugimoto, Itsuki Uechi(Toin Univ. Yokohama),Noriyuki Utagawa, Chitose Kuroda(SatoKogyo Co.,ltd.)
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Jun 3, 15:50-16:10 |
13) Investigation in dugouts by Chain Alley Method -Surface Wave investigation-using a natural Micro Tremor
[Abstract]
*Hisao Hayashi(Geo-X consultant co.,Ltd),Toshio Takagi, Hideyasu Uekuma(FUKKEN CO., LTD)
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Jun 3, 16:10-16:30 |
14) High-resolution marine seismic site survey for proposed IODP scientific drilling east of Australia on the Lord Howe Rise
[Abstract]
*Yoshinori Sanada, Kan Aoike, Kazuya Shiraishi(JAMSTEC),Laura Easton, Ron Hackney(Geoscience Australia),Yuka Kaiho(JAMSTEC),Brian Boston(Columbia University),Takamitsu Sugihara, Yukari Kido, Shusuke Machida, Tatsuya Murayama(JAMSTEC)
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Jun 3, 16:30-16:50 |
15) High-resolution shear-wave seismic reflection surveys across the Kamishiro fault, Itoigawa-Shizuoka Tectonic Line active fault system, central Japan
[Abstract]
*Naoki Ikeguchi(Earthquake Resarch Institute University of Tokyo),Nobuhisa Matsuta(Graduate School of Education, Okayama University),Kyoko Kagohara(Faculty of Education, Yamaguchi University),Shinsuke Okada(Graduate school of Science, Tohoku University),Daisuke Hirouchi(Faculty of Education, Shinshu University),Tatsuya Ishiyama(Earthquake Resarch Institute University of Tokyo),Katsuya Noda(GEOSYS Inc.),Hiroshi Sato(Earthquake Resarch Institute University of Tokyo)
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Jun 3, 16:50-17:10 |
16) Validation of S-wave velocity structure model around the Fujikawa-kako fault zone using seismic interferometry for temporary ground motion observation record
[Abstract]
*Kosuke Chimoto, Hiroaki Yamanaka(Tokyo Tech.),Seiji Tsuno, Masahiro Korenaga(RTRI),Hiroe Miyake(Univ. Tokyo),Shigeki Senna(NIED)
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June 3, Room No.2 |
Session |
[Civil1/Disaster1] |
Chair |
Seiji Tsuno(RTRI) |
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Jun 3, 10:30-10:50 |
31) Phase velocity estimation by multichannel analysis of surface waves with continuous wavelet transform
[Abstract]
*Tatsunori Ikeda, Takeshi Tsuji(Kyushu Univ.)
|
Jun 3, 10:50-11:10 |
32) Elucidation of shallow structure in the western extension of the Futagawa fault by AMT survey
[Abstract]
*Tada-nori Goto, Hisafumi Asaue, Katsuaki Koike(Kyoto University),Satoru Yamaguchi(Osaka City University),Koki Aizawa(Kyushu University)
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Jun 3, 11:10-11:30 |
33) Analysis of gamma-ray spectrum using sparse modeling in radioactive survey
[Abstract]
*Hideki Mizunaga, Toshiaki Tanaka, Kazuki Yamada(Kyushu University)
|
Jun 3, 11:30-11:50 |
34) Disaster prevention control using interference SAR analysis
[Abstract]
*Takako Nakamura, Shuichi Rokugawa(The Univ. of Tokyo)
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Jun 3, 11:50-12:10 |
35) Possibility for disaster prevention use of SAR coherency difference image
[Abstract]
*Shuichi Rokugawa, Takako Nakamura(The Univ. of Tokyo),Yuji Sakuno(Hiroshima Univ.)
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Session |
[Environment etc.] |
Chair |
Kunio Aoike(OYO Corporation) |
|
Jun 3, 13:10-13:30 |
36) Data generation by FDTD Method simulator and their availability for deep learning in the Ground Penetrating Radar Method
[Abstract]
*Shohei Yamashita(Waseda University),Shinichiro Iso(Fukada Geological Institute),Takumi Ueda(Waseda University)
|
Jun 3, 13:30-13:50 |
37) Humanitarian Demining Activities by ALIS in Cambodia
[Abstract]
*Motoyuki Sato, Kazutaka Kikuta(Tohoku University)
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Jun 3, 13:50-14:10 |
38) Temporal changes in rotational invariants of magnetotellric impedance tensor
[Abstract]
*Shinya Sato, Tada-nori Goto(Kyoto University)
|
Jun 3, 14:10-14:30 |
39) On the IP method in simulated landfills focusing on duration time of the polarization current.
[Abstract]
*Sojiro Yamazaki, Kazuhiro Hidari, Kazuo Kamura(Waseda Univ.)
|
Jun 3, 14:30-14:50 |
40) Effectiveness of Induced Polarization measurements for grasping metal-enriched zones in landfills
[Abstract]
*Kazuhiro Hidari, Masato Miyata, Sojiro Yamazaki, Kazuo Kamura(Waseda Univ)
|
Session |
[Geothermal] |
Chair |
Shinya Sakanaka(Akita Univ) |
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Jun 3, 15:10-15:30 |
41) Acquisition and Imaging of the Kijiyama DAS-VSP + SSP Experiment Data
[Abstract]
*Moeto Fujisawa, Naoshi Aoki, Hidehiko Shimizu(JGI),Takuji Mouri(JOGMEC),Akio Hara(JGI)
|
Jun 3, 15:30-15:50 |
42) Subsurface resistivity structure analysis using ultra-short-baseline AMT measurements in geothermal field
[Abstract]
*Yuji Yamada, Tada-nori Goto, Sota Kawaguchi(Kyoto Univ.),Yutaka Sasaki(Nagasaki Univ.)
|
Jun 3, 15:50-16:10 |
43) Dimensionality and Directionality Analysis of MT Data to Image Geothermal Systems in Kiejo-Mbaka Geothermal Field, SW Tanzania.
[Abstract]
*Lucas Tumbu, Hideki Mizunga(Kyushu Univ.)
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Jun 3, 16:10-16:30 |
44) Microseismic monitoring during recharge injection test in OkuAizu geothermal Field
[Abstract]
*Yuki Tanaka, Kyosuke Okamoto, Hiroshi Asanuma(AIST),Takashi Okabe(GERD),Yasuyuki Abe(OAG),Masatoshi Tsuzuki(JOGMEC)
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Jun 3, 16:30-16:50 |
45) Precise drift correction for micro-gravity monitoring using Scintrex gravity meter.
[Abstract]
*Yasuaki Murata(AIST)
|
Jun 3, 16:50-17:10 |
46) Precise gravity survey in Koriyama basin, Fukushima prefecture.
[Abstract]
*Yasuaki Murata, Takeshi Ishihara(AIST)
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June 3, Room No.3 |
Session |
[Poster1] |
Chair |
Jun Horita(GeoTech Co.,Ltd.) |
|
Jun 3, 17:10-18:40 |
P-1) Wave Propagation Simulation of Ground Penetrating Radar using Ray Tracing
[Abstract]
*Yosuke Kiyomoto, Hideki Mizunaga, Toshiaki Tanaka, Shokai Iwamoto(Kyushu University)
|
Jun 3, 17:10-18:40 |
P-2) Resistivity monitoring in column adsorption experiments of heavy metal contaminated water
[Abstract]
*Masato Miyata, Eisuke Kusuyama, Kazuhiro Hidari, Kazuo Kamura(Waseda Univ.)
|
Jun 3, 17:10-18:40 |
P-3) Development of one-dimensional forward modeling for electromagnetic method with Python
[Abstract]
*Yuya Matsumoto, Takumi Ueda(Waseda University)
|
Jun 3, 17:10-18:40 |
P-4) Velocity semblance analysis for GPR profile measurement - The near surface geophysical survey at Oyunuma in the Goshougake geothermal area, northeast of Japan-
[Abstract]
*Yusuke Inoue(Akita Univ (OYO)),Tomoki Tsutsui(Akita Univ (Kyoto Univ)),Shinya Sakanaka(Akita Univ),Takuya Kobayashi(Akita Univ (Nigata Prefectural Government)),Ryuichi Takei, Yuya Tada, Faizul Muhammad, Tomoya Moriwaki(Akita Univ)
|
Jun 3, 17:10-18:40 |
P-5) Attempt of AMT survey with electric field measurements by ultra-short baseline
[Abstract]
*Tada-nori Goto, Yuji Yamada, Sota Kawaguchi, Yusuke Ohta, Shinya Sato, Hisatoshi Koji(Kyoto University),Yutaka Sasaki(Nagasaki University)
|
Jun 3, 17:10-18:40 |
P-6) MT/AMT sounding around Yurihara Oil and Gas Field, Akita, Japan
[Abstract]
Nizam bin zainudin Muhanmmad faizul(Akita Univ),*Shin'ya Sakanaka, Takuya Kobayashi, Yusuke Inoue(Akita Univ),Yuya Tada, Kenta Katou(Akita Univ),Shinji Ikuta(Akita Univ),Takemichi Nojiri(JA Tsuruoka)
|
Jun 3, 17:10-18:40 |
P-7) Examination of an applicability of portable microtremor observation equipment for investigations of shallow subsurface structures in mountainous areas
[Abstract]
*Masayuki Kuriyama, Hiroaki Sato(CRIEPI)
|
Session |
[Poster2] |
Chair |
Masayoshi Chidori(Nippon Geophysical Prospecting Co.,Ltd.) |
|
Jun 3, 17:10-18:40 |
P-8) Characteristics of frequency domain electromagnetic response acquired using an unmanned ground vehicle
[Abstract]
*Kai Satake, Karin Manzawa, Takumi Ueda(Waseda University),Motoharu Jinguuji, Shogo Komori, Toshiyuki Yokota(AIST,GSJ)
|
Jun 3, 17:10-18:40 |
P-9) Study on the surface deformation around Mt.Mihara of Hachijojima using SAR Interferometry
[Abstract]
*Yusei Hamamura, Yoshiya Oda(Tokyo Metropolitan University Department of Civil & Enviromental Engineering)
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Jun 3, 17:10-18:40 |
P-10) Relationship of house damage and shallow S-wave velocity structure at Monou-cho, Japan, during the 2011 Tohoku earthquake
[Abstract]
*Keisuke Mizutani, Yoshiya Oda(Tokyo Metropolitan University Civil and Environmental Engineering)
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Jun 3, 17:10-18:40 |
P-11) Automatic Design of the Stations for Microtremor Array Measurements Using the Google Maps
[Abstract]
*Yujia Guo, Ken Miyakoshi(Geo-Research Institute)
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Jun 3, 17:10-18:40 |
P-12) Robust calculation of seismic responses of S-wave part vertical motion
[Abstract]
*Kunikazu Yoshida(Geo-Research Institute)
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Jun 3, 17:10-18:40 |
P-13) Relationship between height of buildings and normal mode in Eskisehir basin, Turkey
[Abstract]
*Seiji Tsuno(RTRI),Hiroaki Yamanaka(Tokyo Tech.),Onur Kaplan(Anadolu Univ.),Arslan Mehmet safa, Oguz Ozel(Istanbul Univ.)
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Jun 3, 17:10-18:40 |
P-14) VS30 mapping of Murcia city (Southeast of Spain) by use of miniature array method
[Abstract]
*Yoshiya Oda(TMU),Manuel Navarro bernal(Univ of Almeria),Takahisa Enomoto(Kanagawa Univ)
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Jun 3, 17:10-18:40 |
P-15) Development of portable low-cost earthquake/microtremor observation system.
[Abstract]
*Haruhiko Suzuki, Osamu Ishitsuka, Yoshiaki Tanazawa, Koichi Hayashi(OYO),Kenji Oota(4D GeoTek)
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June 5, Room No.1 |
Session |
[Mineral Exploration] |
Chair |
Yoshinori Sanada(JAMSTEC) |
|
Jun 5, 10:00-10:20 |
17) Exploration of seafloor massive sulfides deposits using 3-D inversion of CSEM surveys
[Abstract]
*Keiichi Ishizu, Tada-nori Goto(Kyoto Univ),Weerachai Siripunvaraporn(Mahidol Univ)
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Jun 5, 10:20-10:40 |
18) Reverse time migration angle gather using Characteristic curve mathod
[Abstract]
*Makoto Okada(NC geophysical Survey)
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Jun 5, 10:40-11:00 |
19) Integrated Interpretation of Gravity, Magnetic, Seismic and Well Data for a Volcanic Reservoir
[Abstract]
*Hisako Mochinaga, Motonori Higashinaka(JGI),Katsumi Takai(JAPEX)
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Jun 5, 11:00-11:20 |
20) Strain anomaly detection in a digital core sample using numerical seismic waveforms
[Abstract]
*Jun Matsushima(Univ. of Tokyo),Mohammed Ali, Fateh Bouchaala(Khalifa Univ.)
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Jun 5, 11:20-11:40 |
21) Feasibility study of seismic imaging of supercritical reservoir(s) using DAS and DTS methods in the Ibusuki geothermal field
[Abstract]
Junzo Kasahara(Shizuoka Univ., ENAA),*Yoko Hasada(Daiwa Exploration and Consulting, ENAA),Haruyasu Kuzume(ENAA),Yoshihiro Fujise(WELMA, ENAA),Hitoshi Mikada(Kyoto Univ.)
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Jun 5, 11:40-12:00 |
22) CO2 reservoir monitoring by VSP with a permanent seismic source (ACROSS) and Optical-fiber DAS
[Abstract]
*Masaru Ichikawa, Masashi Nakatsukasa, Naoyuki Shimoda, Hideaki Ban, Ayato Kato(JOGMEC),Don White(GSC),Erik Nickel(PTRC),Thomas Daley(LBNL)
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Session |
[Disaster3] |
Chair |
Yoshiya Oda(TMU) |
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Jun 5, 13:00-13:20 |
23) Estimation of Shallow Velocity Structure using MASW at High-Intensity Seismic Stations of the 2018 Hokkaido Eastern Iburi Earthquake
[Abstract]
*Shingo Nomoto, Jun Horita(Geotechnical Research),Nobuo Takai(Hokkaido Univ.),Michiko Shigefuji(Kyushu Univ.),Takahiro Maeda(NIED),Hiroaki Yamanaka, Kosuke Chimoto(Tokyo Inst. Tech.),Seiji Tsuno, Masahiro Korenaga(Railway Tech. Res. Inst.),Nobuyuki Yamada(Kochi Univ.)
|
Jun 5, 13:20-13:40 |
24) Single station microtremor measurements in Mukawa town, Hokkaido
[Abstract]
*Michiko Shigefuji(Kyushu Univ.),Nobuo Takai(Hokkaido Univ),Jun Horita, Shingo Nomoto(Geo-Technical Research Co.),Takahiro Maeda(NIED),Hiroaki Yamanaka, Kosuke Chimoto(Tokyo Tech),Seiji Tsuno, Masahiro Korenaga(RTRI),Nobuyuki Yamada(Kochi Univ.)
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Jun 5, 13:40-14:00 |
25) Evaluation of ground vibration characteristics by microtremor array observations for Aoyama area and Motomiya area in Morioka City, Iwate Prefecture
[Abstract]
*Hidekazu Yamamoto(Iwate University),Seiya Oba, Koki Tada(Iwate University),Tsuyoshi Saito(Iwate University)
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Jun 5, 14:00-14:20 |
26) Ground amplification rate in Itoshima Peninsula based on 3D S-wave velocity structure by microtremor array exploration
[Abstract]
*Ichiro Hagimori, Tatsunori Ikeda, Takeshi Tsuji(Kyushu Univ.)
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Jun 5, 14:20-14:40 |
27) Shallow S-wave exploration in Eskisehir basin, Turkey
[Abstract]
*Hiroaki Yamanaka, Kosuke Chimoto(Tokyo Inst. Tech.),Tsuno Seiji(Railway Tech. Res. Inst.),Nobuo Takai(Hokkaido Univ),Hjiroe Miyake(Univ. of Tokyo),Oguz Ozel, Safa Arslan, Esref Yalcinkaya(Istanul Univ.),Muammer Tun, Onur Kaplan, Emrah Pekkan(Anadolu Univ)
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Jun 5, 14:40-15:00 |
28) Geophysical investigation of surface geology in damaged areas in Kathmandu Valley during the 2015 Nepal Gorkha earthquake
[Abstract]
*Shinichiro Mori, Jinghe Feng, Takumi Kobayashi(Ehime University),Masayuki Yamada(Newjec),Hidekazu Yamamoto(Iwate University),Netra p. Bhandary(Ehime University)
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Jun 5, 15:00-15:20 |
29) The Asodani's subsurface structure by Micro Tremor Survey - The S-wave velocity structure of Asodani where crack group appeared by 2016 Kumamoto earthquake -
[Abstract]
*Hisao Hayashi(Geo-X consultant co.,Ltd),Tsuyoshi Haraguchi(Osaka City University)
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Jun 5, 15:20-15:40 |
30) High-resolution 3D S-wave velocity structure using ambient noise -Toward automatic estimation of phase velocity-
[Abstract]
*Hiro Nimiya, Tatsunori Ikeda, Takeshi Tsuji(Kyushu university)
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