M (Multidisciplinary and Interdisciplinary) » M-TT Technology & Techniques
[M-TT48] Cryoseismology - A new proxy for detecting surface environmental variations of the Earth -
convener:Masaki Kanao(National Institute of Polar Research), Seiji Tsuboi(JAMSTEC, Center for Earth Information Science and Technology), Genti Toyokuni(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University), Yoshihiro Hiramatsu(School of Geosciences and Civil Engineering, College of Science and Engineering, Kanazawa University)
In high latitude and elevation regions, the Earth's glaciers, ice sheets, sea ice, permafrost, and snowpacks are undergoing rapid change. Fortunately, many of the cryospheric processes of interest produce ground vibrations. Analysis of these seismic signals can yield insight into the relationship between environmental forcing and the response of ocean-cryosphere-solid earth system.
Ice-related seismic motions for small magnitude events are generally named ice-quakes 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 particularly around Greenland, 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 cover recent topics on glacial related seismic events and associated phenomenon. 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, comparison of tectonic and glacier-related seismicity, recent triggered earthquakes and active volcanoes, glacial isostatic adjustment (GIA), harmonic tremor associated with cryoseismic events.
*Takahiko Murayama1, Masaki Kanao2, Masa-yuki Yamamoto3, Yoshiaki Ishihara4, Takeshi Matsushima5, Yoshihiro Kakinami6 (1.Japan Weather Association, 2.National Institute of Polar Research, 3.Kochi University of Technology, 4.National Institute for Environmental Studies, 5.Kyushu University, 6.Hokkaido Information University)
*Seiji Tsuboi1, Daisuke Sugiyama1, Masaki Kanao2, Yoshiaki Ishihara3, Takahiko Murayama4 (1.JAMSTEC, Center for Earth Information Science and Technology, 2.National Institute of Polar Research, 3.National Institute of Environmental Studies, 4.Japan Weather Service)
[MTT48-04] Ice dynamics inferred from the detection of icequake seismicity near the Princess Elisabeth base, eastern Dronning Maud Land, East-Antarctica
*Denis Lombardi, Guilhem Barruol1, Lionel Benoit2, Thierry Camelbeeck3, Irina Gorodetskaya4, Olivier Martin5, Christophe Meynard5, Christian Thom5 (1.Institut de Physique du Globe, Paris, France, 2.Université de Lausanne, Lausanne, Switzerland, 3.Royal Observatory of Belgium, Brussels, Belgium, 4.Centre for Environmental and Marine Studies,University of Aveiro, Portugal, 5.Institut National de l’Information Géographique et Forestière, St-Mandé, France)
Discussion (10:15 AM - 10:30 AM)