IUGG XXIV 2007 will be held in Perugia, Italy for July 2-13, 2007. The third circular can be downloaded from the IUGG web site, http://www.iugg2007perugia.it/. You are cordially invited to attend a symposium on "SS001: Seismological Observations and Interpretation". Please visit the page of this symposium, http://www.iugg2007perugia.it/abstracttype.asp#AssDiv_S. The electric submission deadline of abstracts (Feb. 28, 2007) is rapidly approaching. This is a friendly reminder for abstract submission.

The IASPEI symposium "Seismological Observation and Interpretation" covers a broad area of seismology. This symposium is the only one occasion for people who are working on scattering and heterogeneity to get together. Subject # 5 focuses on the following subjects: advances in wave propagation in heterogeneous media, including synthetic seismograms and waveform modeling in realistic Earth structures, theory and observations of scattering, attenuation and anisotropy, coda wave analysis, Green function retrieval from cross correlation analysis of scattered waves and microseisms, temporal change in medium heterogeneity, and so on.. We hope many papers related to these subjects will be submitted to this symposium. If we have a sufficient number of abstracts, we are able to have a special session on scattering subjects and furthermore to edit a special issue as the proceedings.

We are looking forward to seeing you in Perugia, Italy.

Best regards,

Haruo SATO

Leader of the Task Group on Scattering and Heterogeneity of IASPEI
Co-convener of the symposium on Seismic Observations and Interpretation

Professor of Solid-Earth Physics
Dept. of Geophysics, Graduate School of Science, Tohoku University
E-mail: sato@zisin.geophys.tohoku.ac.jp

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SS001: Seismic Observations and Interpretation

Sponsoring Association: IASPEI

The essence of seismology lies in the observation and interpretation of earthquakes and earthquake-generated ground motions, together with effective data distribution and analysis. There is a continuing need to improve mechanisms for the archiving, dissemination and analysis of these data. The real Earth structure varies in three-dimensions, can show variation with time and is anisotropic and anelastic in part. Thus methods for seismogram interpretation need to take account of the complexities, which are revealed in the currently available high quality data. Papers are invited for the topics:

1. Developments in seismic instrumentation, networks and data centers, early warning systems, large-scale portable networks, international data exchange and management of massive data sets.
2. Comprehensive seismogram analysis at single stations, seismic networks and arrays - requirements, potentials and future developments.
3. Rapid and routine determination of earthquake parameters, particularly in the context of natural disasters as well as the verification and detection associated with the Comprehensive Nuclear-Test-Ban Treaty (CTBT).
4. The role of international data centers in improving and modernizing the global catalogs of earthquakes.
5. Advances in wave propagation in heterogeneous media, including synthetic seismograms and waveform modeling in realistic Earth structures, theory and observations of scattering, attenuation and anisotropy.
6. Developments in seismological interpretation, including development of inversion techniques, seismic tomography and whole-Earth analysis methods.
7. Earthquake location and relocation.
8. Preserving and cataloging the seismological records of past earthquakes.
9. Re-interpretation and calibration of early 20th century earthquakes from seismological archive data.

Convener:
Dmitry Storchak,
International Seismological Centre, Pipers lane, Thatcham, Berkshire, U.K.
dmitry@isc.ac.uk

Co-Convener:
Remy Bossu, EMSC, France, remy.bossu@cea.fr
Jim Dewey, U.S. Geological Survey, dewey@usgs.gov
Winfried Hanka, GeoForschungsZentrum Potsdam, Germany, hanka@gfz-potsdam.de
Roger Musson, British Geological Survey, UK, r.musson@bgs.ac.uk
Paul Richards, Columbia University, USA, richards@ldeo.columbia.edu
Haruo Sato, Tohoku University, Japan, sato@zisin.geophys.tohoku.ac.jp