Welcome to Ryohei Sasajima's page.

I am Ryohei Sasajima, a postdoctoral researcher in Research Center For Earthquake Prediction, Disaster Prevention

Research Institute, Kyoto University, Uji, Japan.

[Main subjects of research] Tectonics, Tectonophysics, Crustal dynamics, Origin of stress in the lithosphere, Oceanic lithosphere

[Main methods of research] Finite element method, Other simple numerical simulations

[Main data used for research] Earthquake catalog, Geodetic data (GNSS, Leveling data), Gravity anomalies

[Publications]

[Peer-reviewed journal, Corresponding author]

1. Ryohei Sasajima, Bunichiro Shibazaki, Hikaru Iwamori, Takuya Nishimura and Yoshihiko Nakai (2019) Mechanism of subsidence of the Northeast Japan forearc during the late period of a gigantic earthquake cycle. Scientific Reports, v. 9, 5726, doi: https://doi.org/10.1038/s41598-019-42169-y

2. Ryohei Sasajima and Takeo Ito (2017) Anisotropic horizontal thermal contraction of young oceanic lithosphere inferred from stress release due to oceanic intraplate earthquakes. Tectonics, v. 36, p.1988–2021, doi: https://doi.org/10.1002/2017TC004680

3. Ryohei Sasajima and Takeo Ito (2016) Strain rate dependency of oceanic intraplate earthquake b-values at extremely low strain rates. Journal of Geophysical Research: Solid Earth, v. 121 (6), p.4523–4537, doi: https://doi.org/10.1002/2016JB013221

{Note} Sasajima and Ito (2017) was selected as Research Spotlight of Tectonics, and the paper was introduced in Eos as follows:

Witman, S. (2017), Seafloor activity sheds light on plate tectonics, Eos, 98, doi: 10.1029/2017EO085163. Published on 27 October 2017.

[Peer-reviewed journal, Coauthor]

1. Cecep Pratama, Takeo Ito, Ryohei Sasajima, Takao Tabei, Fumiaki Kimata, Endra Gunawan, Yusaku Ohta, Tadashi Yamashina, Nazli Ismail, Irwandi Nurdin, Didik Sugiyanto, Umar Muksin, and Irwan Meilano (2017) Transient rheology of the oceanic asthenosphere following the 2012 Indian Ocean Earthquake inferred from geodetic data. Journal of Asian Earth Sciences, v. 147, p. 50–59, doi: https://doi.org/10.1016/j.jseaes.2017.07.049

[Doctoral dissertation]

Ryohei Sasajima (2017) Thermal contraction of the oceanic lithosphere and oceanic intraplate earthquake. (Doctoral dissertation, Nagoya University, Nagoya, Japan), Retrieved from https://irdb.nii.ac.jp/en/01152/0001466910

[Career]

2006/4--2010/3: Department of Earth and Environmental Science, Nihon University, Tokyo, Japan (Undergraduate program)

2010/4--2012/3: Earth Information Mathematical Science, Graduated School of Integrated Basic Science, Nihon University, Tokyo, Japan (Master's program, Master of Science）

2012/4--2017/3: Department of Earth and Environmental Sciences, Graduated School of Environmental Science, Nagoya University, Nagoya, Japan (Doctoral program, Doctor of Science)

2017/3--2018/11: International Institute of Seismology and Earthquake Engineering, Building Research Institute, Tsukuba, Japan (A postdoctoral researcher of Crustal Dynamics Project)

2018/12--2019/3: Research Center For Earthquake Prediction, Disaster Prevention Research Institute, Kyoto University, Uji, Japan (A postdoctoral researcher of Crustal Dynamics Project)

2019/4-- : Research Center For Earthquake Prediction, Disaster Prevention Research Institute, Kyoto University, Uji, Japan (Research Fellowship for Young Scientists of Japan Society for the Promotion of Science (JSPS) )