Japan Geoscience Union Meeting 2015

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Symbol S (Solid Earth Sciences) » S-CG Complex & General

[S-CG63] Cryoseismology - a new proxy for detecting surface environmental variations of the Earth -

Mon. May 25, 2015 11:00 AM - 12:45 PM 102A (1F)

Convener:*Masaki Kanao(National Institute of Polar Research), Seiji Tsuboi(JAMSTEC, Data Research Center for Marine-Earth Sciences), Genti Toyokuni(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University), Muneyoshi Furumoto(Graduate School of Environmental Studies, Nagoya University), Chair:Seiji Tsuboi(JAMSTEC, Center for Earth Information Science and Technology), Masaki Kanao(National Institute of Polar Research)

11:30 AM - 11:45 AM

[SCG63-03] Passive seismology of ice: an overview of main seismic sources and their characteristics

*Evgeny A. PODOLSKIY1, Fabian WALTER2 (1.Institute of Low Temperature Science, Hokkaido University, 2.Mountain Hydrology and Mass Movements, Swiss Federal Research Institute WSL)

Keywords:icequake, Cryosphere, Seismology, seismic source, magnitude, stress drop

Recent `flood' of papers and passive seismic data about ice covered areas of the planet produced a need for generalized ways to distinguish between different types of seismic sources generating ice-quakes. Basing on analysis of more than 100 publications, we make a step in this direction and attempt to take a quantitative look at key features of previously reported signals. We find that the emerging seismic `portrait' of the Cryosphere can be mainly explained in terms of released glacial stress and external forcings. Our study presents the first sketch of criteria which could be ultimately helpful in detecting and categorizing various ice-related phenomena.