Growing importance of metadata for synthetics: Calculating and Sharing Synthetic Seismic Data Dogan Seber University of California, San Diego San Diego Supercomputer Center

Metadata: Two definitions Used to refer to “attributes in data sets” Used as “data about data: archival information for a data set following a certain standard (e.g, Dublin Core, FGDC)”

Challenges faced in a community-based synthetic seismogram calculations and exchange Inaccessibility of software Complexity of software Lack of computational resources Lack of reliable high resolution earth models Lack of data exchange standards and metadata

What IT could offer … The Grid Distributed computing environment (e.g., TeraGrid) Seamless access to distributed data resources (e.g., GEON) Service-based architecture design (e.g., Web services) Metadata (in XML format?) Attribute level Archival/Librarian level

An Example from GEON Grid-enabled synthetic seismogram calculation system for research and education In collaboration with LLNL (Bill Glassley and Shawn Larsen) Service-based access to resources and data Sharable control files for reproducible calculations Long term archival of results

3D Seismic Wave Propagation

Digital Libraries/GEON Data Grid IRIS Earthquakes Stations Waveform Modeling earthquake recordings in 2D/3D environment to study the interior of the Earth Gsat e3d HPC Centers LLNL SDSC Digital Libraries/GEON Data Grid Earth model