[S-CG40] Active Tectonics and Seismic Hazards in the Himalayan Region

Sun. Jun 6, 2021 3:30 PM - 5:00 PM Ch.24 (Zoom Room 24)

convener:Kazuki Koketsu(Earthquake Research Institute, University of Tokyo), Nath Soma Sapkota(Nepal Geological Society), Srinagesh Davuluri(CSIR-National Geophysical Research Institute), Chairperson:Hiroe Miyake(Earthquake Research Institute, University of Tokyo), Kazuki Koketsu(Earthquake Research Institute, University of Tokyo)

In the Himalayan region, the Indian and Eurasian plates collide, and the Indian lithosphere underthrusts beneath the Eurasian plate from the Main Frontal Thrust with a convergence rate of approximately 18 mm/year. This has historically caused large earthquakes such as the 1934 Bihar-Nepal earthquake, and seismic hazards in the region remain high. On April 25, 2015 (UTC), the Mw 7.8 Gorkha earthquake occurred along the plate boundary, and this affected the Main Frontal Thrust increasing the stress in possible source areas of future large earthquakes. Therefore, even after the Gorkha earthquake, studies on active tectonics and seismic hazards are still necessary in the Himalayan region. All kinds of studies on them are welcome for this session.

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3:30 PM - 3:45 PM

[SCG40-07] 2D FDM simulation of seismic ground motions and inversion of velocity structure models in the Kathmandu Valley, Nepal

*Hongqi Diao¹, Kazuki Koketsu¹, Kazuhito Hikima² (1.Earthquake Research Institute, University of Tokyo, 2.Tokyo Electric Power Company Holdings)

3:45 PM - 4:00 PM

[SCG40-08] Microtremor observation in the Kathmandu valley, Nepal: Past, Present, and Future perspectives

*Mukunda Bhattarai¹, Rajesh Sharma³, Sunita Bhattarai², Tara Pokrarel¹, Chintan Timsina¹, Suresh Shrestha², Dinesh Nepali², Manoj Nakarmi⁴, Prakirna Tuladhar⁴, Takumi Hayashida⁵, Toshiaki Yokoi⁵, Hiroe Miyake⁶, Koichi Kusunoki⁶ (1.National Earthquake Monitoring and Research Center, Department of Mines and Geology, Nepal, 2.Department of Mines and Geology, Nepal, 3.Seismological Center Surkhet, Department of Mines and Geology, Nepal, 4.Department of Urban Development and Building Construction, Nepal, 5.International Institute of Seismology and Earthquake Engineering, Building Research Institute,Japan, 6.Earthquake Research Institute, The University of Tokyo, Japan)

4:00 PM - 4:15 PM

[SCG40-09] BROADBAND MICROTREMOR ARRAY EXPLORATION IN THE KATHMANDU VALLEY, NEPAL

*Toshiaki Yokoi¹, Takumi Hayasida¹, Mukunda Bhattarai³, Tara Pokharel², Suresh Shrestha², Chintan Timsina³, Sunita Bhattarai², Rajesh Sharma³, Dinesh Nepali² (1.International Institute of Seismology and Earthquake Engineering, Building Research Institute, Japan, 2.Department of Mines and Geology, Nepal, 3.National Earthquake Monitoring and Research Centre, NEMRC/DMG, Nepal)

4:15 PM - 4:30 PM

[SCG40-10] Seismic observation and automatic hypocenter location system in Nepal

*Shigeki Horiuchi¹, Masumi Yamada³, Koji MIYAKAWA², Hiroe Miyake², Tadashi Yamashina⁴, Chintan Timsina⁵, Mukunda Bhattarai⁵, Bharat Prasad Koirala⁵, Monika Jha⁵, Lok Bijaya Adhikari⁵ (1.Home Seismometer Corporation, 2.ERI, 3.DPRI, 4.Kochi University, 5.DMG, Nepal)

4:30 PM - 4:45 PM

[SCG40-11] Upper-Crustal Structure of Central Nepal inferred from Local Earthquake Tomography

*Chintan Timsina¹, James Mori², Masumi Yamada² (1.Graduate School of Science, Kyoto University, 2.Disaster Prevention Research Institute, Kyoto University)

4:45 PM - 5:00 PM

[SCG40-12] Towards the Further Development of the Education and Research on Earthquakes in Nepal

*Mai Suzuki¹, Binil Aryal², Kazuki Koketsu¹ (1.Earthquake Research Institute, The University of Tokyo, 2.Central Department of Physics, Tribhuvan University)

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