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

Thu. May 24, 2018 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall7, 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)

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.

[U03-P01] Characteristic atmosphere and ocean interaction in the coastal and marine environment inferred from infrasound at Terra Nova Bay, Antarctica - observation and initial data -

*Takahiko Murayama², Masaki Kanao¹, Masa-yuki Yamamoto³, Yoshiaki Ishihara⁴, takuma oi⁵ (1.National Institute of Polar Research, 2.Japan Weather Association, 3.Kochi University of Technology, 4.Japan Aerospace Exploration Agency, 5.Toho Mercantile Co., Ltd)

[U03-P02] Seismic tremors and their relation to cryosphere dynamics in April 2015 around the Lützow-Holm Bay, East Antarctica

*Masaki Kanao¹ (1.National Institute of Polar Research)

[U03-P03] Characteristics of ice tremors around Syowa Station, Antarctica, during 2013–2015

Yuya Tanaka¹, *Yoshihiro Hiramatsu¹, Yoshiaki Ishihara², Masaki Kanao³ (1.Kanazawa University, 2.ISAS/JAXA, 3.NIPR)

[U03-P04] Seismic observations in Greenland by a joint USA and Japanese GLISN team (2011-2017)

*Genti Toyokuni¹, Dean Childs², Masaki Kanao³, Yoko Tono⁴, Seiji Tsuboi⁵ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.IRIS/PASSCAL, 3.NIPR, 4.MEXT, 5.JAMSTEC)