Report on Workshop Present status and future plans of polar studies in global seismology

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1 66 Symposium/Meeting Report Report on Workshop Present status and future plans of polar studies in global seismology Masaki Kanao,**- 2 +, ;,**- +, - Abstract: A workshop on Present status and future plans of polar studies in global seismology was held on,-rd and,.th January,**-,at the National Institute of Polar Research with -2 participants. The purposes of this workshop were to discuss scientific work by several seismological methods for more e$cient scientific planning and insights. The presentations were divided into the three sessions +) regional and local studies to target the polar regions,,) global studies by use of data from polar regions,and -) studies in the Arctic,high mountains such as the Himalaya,and in several continental blocks in a past super-continent: Gondwana. From this workshop, we could identify the significance of polar studies for global seismology; in particular, insight into the inner structure and dynamics of the Earth from special windows located at high latitude. We have also conducted several multidisciplinary studies such as amalgamation and breakup of the super-continent,plume tectonics,ice sheet dynamics and crustal movements,and laboratory seismic velocity measurements of the metamorphic rocks. Moreover,we have held fruitful discussions about future plans for data archiving technology,observation systems,and methodology for seismological analyses. :,**- +,-,. -2 +, - National Institute of Polar Research,Kaga +-chome,itabashi-ku,tokyo +1-2/+/.,Vol..2,No. +, 00 10,,**. Nankyoku Shiryô (Antarctic Record),Vol..2,No. +, 00 10,,**.,**. National Institute of Polar Research

2 67 +.,**- +,- +,. + International Geophysical Year (IGY); +3/1 /2 +3/3.* +33* Federation of Digital Seismographic Networks; FDSN +33* -* +, -, Vladimir D. Suvorov,.,.+. +,-

3 68 + Table +. Program of Workshop Present status and future plans of polar studies in global seismology. +,- +-: ** +2:,* + : S :, IFREE +,. *3: ** +/: +* - JARE.- JARE-.- JARE.+,.- V.D. Suvorov, E.A. Melnik and B.P. Mishenkin (Russian Academy of Science: Shiberian Branch) Deep seismic soundings in Yakutian kimberlite province, Russia. S

4 69 P S : :, - km Sushil Kumar : LEGENDS +33* FDSN Polar Path PKP BC PKP DF Tanaka and Hamaguchi, +331 Super rotation Song and Richards, +330 JISNET PKP BC PKP DF PREM PREM *.*/ km s PREM +./ ++ STS-+ - SV-SH D +** km, *./ +.,,1 PKP 2* N +*- E

5 70 P - *., Isse and Nakanishi,,**+ SPA The Incorporated Research Institutions for Seismology; IRIS,**. +33* FDSN Ritzwoller et al.,,**+ IRIS,* +/* +** +/* elastic thickness M. Negishi et al., Mw 2., Tsuboi et al.,,*** +, / + mm yr James and Ivins, +332 P / / m FDSN S

6 71 Kanao et al.,,**, GPS,.,. NIED OHP PACIFIC,+; PO- SEIDON +33* POSEIDON IFREE IFREE NIED OHP POLARIS Japanese Antarctic Research Expedition; JARE./ JARE-./ UUCP POLARIS JARE

7 72,.-., +,. JARE-.+, -.- JARE-.- /.3 0., km s,**- +, * S,1 GPS -** m Vladimir D. Suvorov +31* Suvorov et al., +333 Suvorov et al.,,**,

8 73 /* km,...,.0 Lattice Preferred Orientation LPO P LPO P,* -/ km *./ +.* km S km s,*** km SKS Tommasi and Vauchez,**+

9 74 LEGENDS Brown et al.,,**+ -. Vladimir D. Suvorov

10 75 : V.D. Suvorov NET IHI -2 Brown, L.D., Kroner, A., Powell, C., Windley, B. and Kanao, M. (,**+): Deep Seismic Exploration of East Gondwana: the LEGENDS Initiative. Gondwana Res.,., 2.0 2/*. Isse, T. and Nakanishi, I. (,**+): Inner-core anisotropy benearth Australia and di#erential rotation. Geophys. J. Int., +/+,,//,0-. James, T.S. and Ivins, E.R. (+332): Predictions of Antarctic crustal motions driven by present-day ice sheet evolution and by isostatic memory of the Last Glacial Maximum. J. Geophys. Res., +*-,.33- /*+1. Kanao, M., Kubo, A., Shibutani, T., Negishi, H. and Tono, Y. (,**,): Crustal structure around the Antarctic margin by teleseismic receiver function analyses. Antarctica at the Close of a Millennium, ed. by J.A. Gamble et al. Wellington, The Royal Society of New Zealand,.2/.3+ (R. Soc. N.Z. Bull., -/).,**. : SEAP,** ,**- :.-

11 76.1 -, 1+. Negishi, H., Nogi, Y. and Kaminuma, K. (+332): An intraplate earthquake that occurred near Syowa Station, East Antarctica. Polar Geosci., ++, -,.+. Ritzwoller, M.H., Shapino, N.M., Levshin, A.L. and Leahy, G.M. (,**+): Crustal and upper mantle structure beneath Antarctica and surrounding oceans. J. Geophys. Res., +*0, -*0./ -*01*. Song, X. and Richards, P.G. (+330): Seismological evidence for di#erential rotation of the Earth s inner core. Nature, -2,,,,+,,.. Suvorov, V.D., Parasotka, B.S. and Chernyi, S.D. (+333): Deep seismic sounding studies in Yakutia. Phys. Solid Earth, -/, 0+, 0,3. Suvorov, V.D., Mishenkina, Z.M., Petrick, G.V., Sheludko, I.F., Seleznev, V.S. and Solovyov, V.M. (,**,): Structure of the crust in the Baikal rift zone and adjacent areas from Deep Seismic Sounding data. Tectonophysics, -/+, Tanaka, S. and Hamaguchi, H. (+331): Degree one heterogeneity and hemispherical variation of anisotropy in the inner core from PKP(BC)-PKP(DF) time. J. Geophys. Res., +*,,,3,/,3-2. Tommasi, A. and Vauchez, A. (,**+): Continental rifting parallel to ancient collisional belts: An e#ect of the mechanical anisotropy of the lithospheric mantle. Earth Planet. Sci. Lett., +2/, +33,+*. Tsuboi, S., Kikuchi, M., Yamanaka, Y. and Kanao, M. (,***): The March,/, +332 Antarctic Earthquake: Great earthquake caused by postglacial rebound. Earth Planets Space, /,,