Faculty Profiles - URABE Atsushi

Papers - URABE Atsushi

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Reconstruction of the 1741 Oshima-Ohshima Tsunami by numerical simulation, historic record and tsunami deposits

Kawakami Gentaro, Ioki Kei, Yanagisawa Hideaki, Tanioka Yuichiro, Kase Yoshihiro, Nishina Kenji, Hirose Wataru, Koyasu Hiromichi, Urabe Atsushi

Annual Meeting of the Geological Society of Japan 2018 83 - 83 2018

Reconstruction of tsunami history based on event deposits in the Niigata area, eastern coast of the Sea of Japan Reviewed

Atsushi Urabe

QUATERNARY INTERNATIONAL 456 53 - 68 2017.10

Photogrammetry-based texture analysis of a volcaniclastic outcrop-peel: Low-cost alternative to TLS and automation potentialities using Haar Wavelet and Spatial- Analysis Algorithms Reviewed

Gomez, C, Kataoka, K.S, Saputra, A. Wassmer, P, Urabe, A, Morgenroth, J, Kato, A

Forum Geografi (Indonesian Journal of Spatial and Regional Analysis) 31 16 - 27 2017.6

Crevasse splay deposits of the 2015 Kanto-Tohoku Torrential Rain Disaster in the central part of the Kinu River, Kami-Misaka district, Joso City Reviewed

Sato Yoshiki, Miyachi Yoshinori, Urabe Atsushi, Komatsubara Junko, Naya Tomonori

The Quaternary Research (Daiyonki-Kenkyu) 56 ( 2 ) 37 - 50 2017

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Association for Quaternary Research

The 2015 Kanto-Tohoku Torrential Rain that hit the Kanto and Tohoku regions of eastern Japan from September 9 to September 12, 2015, resulted in a major riverine and slope disaster. Overbanking and breaching occurred along the central part of the Kinu River and formed crevasse splays on the flood plain around Kami-Misaka, Joso City, Ibaraki Prefecture. We clarified the distribution of crevasse splay deposits based on an interpretation of aerial photographs taken just after the disaster and a field survey. In addition, we performed an excavation survey and grain size analysis of the crevasse splay deposit. These resulted in the following findings.1) Crevasse splay deposits mainly comprise fine to medium sand and can be divided into the following three units : Unit A, sandy silt to fine sand layer showing upward coarsening ; Unit B, fine to medium sand layer showing upward fining ; and Unit C, fine to medium sand layer with parallel lamination and low-angle cross-stratification.2) The difference between these units probably corresponded to the changes in flow conditions during the flooding. Unit A, deposited at the early period of flooding, was derived from heavy rain and overbank of the river water ; Unit B, deposited during hydraulic bore, was generated by the breach of the river bank, flowing down the flood plain ; Unit C was formed by the flooding flow from the Kinu River via the breach point during the flood.3) Typical stratigraphy of crevasse splay deposits in this study is characterized by the upward-fining unit (Unit B), which shows a difference from the known flood deposits.

DOI： 10.4116/jaqua.56.37

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2011年東北地方太平洋沖地震による潮来市日の出地区の液状化被害と液状化層の粒度組成 Reviewed

卜部厚志, 山本泰士

地学雑誌 126 731 - 748 2017

Tsunamis and possible tsunamigenic deposits along the eastern margin of the Japan Sea Invited Reviewed

Kawakami Gentaro, Kase Yoshihiro, Urabe Atsushi, Takashimizu Yasuhiro, Nishina Kenji

The Journal of the Geological Society of Japan 123 ( 10 ) 857 - 877 2017

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Geological Society of Japan

Extensive research has been conducted on tsunamigenic deposits along the eastern margin of the Japan Sea since the 2011 Tohoku Earthquake and tsunami. This paper reviews the characteristics of the large known tsunamis and the possible tsunamigenic deposits identified in this region. We have also reconstructed the spatio-temporal distribution, and a provisional correlation, of the tsunamigenic deposits in order to estimate the tsunami recurrence intervals and their wave source regions.Most of the tsunamigenic deposits were recognized in peaty and marshy deposits found on swales of coastal dunes, flood plains, and small valley plains. Large numbers of tsunamigenic sandy layers were also identified in lagoonal deposits. In addition, some gravelly deposits of possible tsunamigenic were recognized on top of low-lying marine terraces and slope talus.Although several historical tsunamis in the 18-19th centuries have been recorded along the eastern margin of the Japan Sea, there are few localities where deposits can be correlated to these records. Tsunamigenic deposits suggest that four tsunami events have occurred during the 9-14th centuries, despite there being limited historical records of tsunamis older than the 18th century. The distribution of these four deposits is as follows: 14th century = Aomori-northern Yamagata; 12th century = southwestern Hokkaido; 11th century (?1092 AD) = Sado/Niigata-southern Yamagata; 9th century (?850 AD) = (Sado)-Yamagata-Aomori. These events are also recorded in the deep-sea Japan Basin as seismo-turbidites. Most tsunamigenic deposits older than the 9th century have only been identified at remote islands (Okushiri, Tobishima, and Sado).Several unanswered research questions on these tsunamigenic deposits remain, such as robust identification of the origins and precise ages of the deposits. Our work provides a framework for future screening of potential tsunamigenic deposit data and an improved understanding of paleotsunami events along the eastern margin of the Japan Sea.

DOI： 10.5575/geosoc.2017.0054

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富山湾沿岸地域における潟湖の成立年代-貝塚および低湿地遺跡の成立に関して- Reviewed

卜部厚志, 酒井英男, 麻柄一志

大境 36 32 - 41 2017

Millennial-scale reworking of tephra in alluvial to shallow marine settings: Distinguishing pseudo-isochrons from genuine ones Reviewed

Kyoko S. Kataoka, Atsushi Urabe, Yoshitaka Nagahashi

QUATERNARY INTERNATIONAL 397 173 - 193 2016.3

Tsunami deposits recognized in Okushiri Island, southwestern Hokkaido, Japan Reviewed

Kase Yoshihiro, Koshimizu Ken'ichi, Tajika Jun, Ohtsu Sunao, Urabe Atsushi, Okazaki Noritoshi, Fukami Hiroshi, Ishimaru Satoshi, Nishina Kenji, Kawakami Gentaro, Hayashi Keiichi, Takashimizu Yasuhiro, Hirose Wataru, Sagayama Tsumoru, Takahashi Ryo, Watanabe Tatsuya

The Journal of the Geological Society of Japan 122 ( 11 ) 587 - 602 2016

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Geological Society of Japan

Okushiri Island, located in southwest Hokkaido, Japan, was hit by an earthquake-generated tsunami in July 1993. An excavation survey revealed several event sand beds, interbedded with peaty sediments, in the lowland at the southernmost part of the island. These beds consist of relatively well-sorted fine- to medium-grained sand similar to sandy shoreline deposits; they are normally graded, fining and thinning landwards. Some beds show partial erosional bases and ripple cross-laminations, implying landward-directed paleocurrents, and grain fabrics also indicate the landward dispersal of clastics. The sand beds yield marine organic-walled microfossils such as dinoflagellate cysts and foraminiferal linings. These findings indicate that the sand beds are of tsunami origin. The results of carbon-14 dating and tephrochronology indicate that at least six tsunami events, including the AD 1741 Oshima-Ohshima and the AD 1993 Hokkaido Nansei-Oki tsunamis, have hit the island over the past 3000-4000 years.

DOI： 10.5575/geosoc.2016.0042

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南関東各遺跡の富士-河村城スコリア(Fj-Kw)対比候補--Fj-Kw:1590年直後に富士山から噴出した新発見テフラ-- Reviewed

上本進二, 上杉陽, 卜部厚志

関東の四紀 35 37 - 55 2016

新潟地域における小・中学生にむけた防災教育の取り組み Reviewed

卜部厚志

第四紀研究 55 169 - 174 2016

(Cancel) Paleo-tsunami deposits intercalated in Holocene marine terrace of Tobishima Island on the Japan Sea Eastern Margin Mobile Belt

Takashimizu Yasuhiro, Ono Katsunori, Urabe Atsushi, Nishina Kenji, Kawakami Gentaro, Hirakawa Kazuomi

Annual Meeting of the Geological Society of Japan 2016 ( 0 ) 351 - 351 2016

Vertical distribution of organic-walled microfossils in the Tsunami deposit.

Hayashi Keiichi, Kase Yoshihiro, Urabe Atsushi, Takashimizu Yasuhiro, Kawakami Gentaro, Nishina Kenji

Annual Meeting of the Geological Society of Japan 2016 ( 0 ) 37 - 37 2016

Differences of distributions patterns between tsunami gravels and storm gravels on a surface of storm swash terraces

Nishina Kenji, Kawakami Gentaro, Kase Yoshihiro, Hirose Wataru, Urabe Atsushi, Takashimizu Yasuhiro, Hirakawa Kazuomi

Annual Meeting of the Geological Society of Japan 2016 ( 0 ) 36 - 36 2016

Features of tsunami deposits analyzed by inorganic geochemistry

Kase Yoshihiro, Kawakami Gentaro, Nishina Kenji, Hayashi Keiichi, Urabe Atsushi, Takashimizu Yasuhiro

Annual Meeting of the Geological Society of Japan 2016 ( 0 ) 38 - 38 2016

Event deposit of the alluvial sediments in the coastal area of Toyama Bay

Urabe Atsushi, Takashimizu Yasuhiro, Suzuki Kouji, Kataoka Kyoko, Nishina Kenji, Kawakami Geotaro, Hirakawa Kazuomi, Sakai Hideo

Annual Meeting of the Geological Society of Japan 2015 321 - 321 2015

磁気ファブリックと粒度特性を用いた名取川河口左岸域における2011年東北地方太平洋沖地震津波の挙動 Reviewed

澁谷剛丈, 髙清水康博, 卜部厚志, 鈴木幸治

堆積学研究 73 3 - 17 2014

An Evaluation of the Uncertainty on the Investigation Results by Using Evidential Support Logic Reviewed

Akio NAKAYASU, Ryosuke DOKE, Tadafumi NIIZAT, Atsushi URABE, Eisuke ONO

Geoinformatics 25 ( 4 ) 189 - 203 2014

新潟県佐渡市加茂湖におけるイベント堆積物 Reviewed

卜部厚志

佐渡の自然史 2 67 - 78 2014

A new Miocene three-spined stickleback (Pisces: Gasterosteidae) from Central Japan Reviewed

Mikhail V. Nazarkin, Yoshitaka Yabumoto, Atsushi Urabe

PALEONTOLOGICAL RESEARCH 16 ( 4 ) 318 - 328 2013.1

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