[U-03] Cryoseismology - a new proxy for detecting surface environmental variations of the Earth -

Thu. May 24, 2018 10:45 AM - 12:15 PM 103 (1F International Conference Hall, Makuhari Messe)

convener:Genti Toyokuni(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University), Masaki Kanao(National Institute of Polar Research), Seiji Tsuboi(海洋研究開発機構), Chairperson:Toyokuni Genti(東北大学), Tsuboi Seiji, Kanao Masaki

Several kinds of environmental signals associated with ocean - cryosphere - solid earth
systems have recently been detected in bi-polar regions. Ice-related seismic motions for
small magnitude events are generally named ice-quakes (ice-shocks) and can be generated by glacially related dynamics. Such kinds of cryoseismic sources are classified
into the movements of ice sheets, sea-ice, oceanic tide-cracks, icebergs and the calving
fronts of ice caps. Cryoseismic waves are likely to be influenced by variations in
environmental conditions, and the continuous study of their time-space variability
provides indirect evidence of climate change. As glacial earthquakes are the most
prominent phenomena found recently in polar regions, in particular on the Greenland in this 21st century, the new innovative studies from seismology are expected by long-
term monitoring under extreme conditions in the Earth's environment.

Taking these issues into account, the conveners are willing to invite many contributions
to a special session on "Cryoseismology", which will cover the recent achievements on
glacial related seismic events and associated phenomenon observed in polar regions. It
is particularly encouraged to have contributions based on seismic signals involving the
dynamics of ice sheets, sea-ice, icebergs and glaciers. Although the glacial earthquakes
are the most prominent evidence found recently in polar regions, all related topics
involving polar seismology are welcome, such as studies of crust and mantle structure in
the area, comparison of tectonic and glacier-related seismicity, recent triggered
earthquakes and active volcanoes, glacial isostatic adjustment (GIA), harmonic tremor
associated with cryoseismic events, etc.

+Add all to schedule

Introduction (10:45 AM - 10:50 AM)

10:50 AM - 11:05 AM

[U03-01] Changes in surface-wave phase velocities below the Greenland Ice Sheet measured from three-component ambient noise correlation method

*Genti Toyokuni¹, Ryota Takagi¹, Hiroshi Takenaka², Masaki Kanao³, Seiji Tsuboi⁴, Yoko Tono⁵ (1.Department of Geophysics, Tohoku University, 2.Department of Earth Sciences, Okayama University, 3.NIPR, 4.JAMSTEC, 5.MEXT)

11:05 AM - 11:20 AM

[U03-02] Seasonal and inter-annual dynamics of Siachen Glacier (Eastern Karakorum) observed by L-Band data, using feature tracking and backscatter intensity

*Muhammad Usman¹, Masato Furuya¹ (1.Space Geodesy Research Section,Division of Earth and Planetary Dynamics, Department of Natural History Science, School of Science, Hokkaido University)

11:20 AM - 11:35 AM

[U03-03] Ambient seismic noise at a Himalayan debris-covered glacier

*Evgeny A. Podolskiy¹, Koji Fujita², Sojiro Sunako², Akane Tsushima³, Rijan Bhakta Kayastha⁴ (1.Arctic Research Center, Hokkaido University, 2.Graduate School of Environmental Studies, Nagoya University, 3.Research Institute for Humanity and Nature, Kyoto, Japan, 4.School of Science, Kathmandu University)

11:35 AM - 11:50 AM

[U03-04] Detection of infrasound wave on icebreaker SHIRASE during JARE-54 and -55

*Yoshihiro Kakinami¹, Takahiko Murayama², Masa-yuki Yamamoto³, Masaki Kanao⁴ (1.National Institute of Technology, Tomakomai College , 2.Japan Weather Association, 3.Kochi University of Technology, 4.National Institute of Polar Research)

11:50 AM - 12:05 PM

[U03-05] Temporal–spatial variations in infrasound sources related to cryosphere dynamics in Lützow–Holm Bay Region, Antarctica

★Invited Papers

*Masaki Kanao¹, Takahiko Murayama², Masa-yuki Yamamoto³, Yoshiaki Ishihara⁴ (1.National Institute of Polar Research, 2.Japan Weather Association, 3.Kochi University of Technology, 4.Japan Aerospace Exploration Agency)

Discussion (12:05 PM - 12:15 PM)