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Organization Title

A Virtual Strong-Motion Data Center for Data Dissemination through the Internet

by R. Archuleta, A. Tumarkin, G. Lindley, A. Shakal and R. Borcherdt

Archuleta, A., A. Tumarkin, G. Lindley, A. Shakal and R. Borcherdt (1999). A Virtual Strong-Motion Data Center for Data Dissemination through the Internet. SMIP99 Seminar on Utilization of Strong-Motion Data, p. 145 - 154.

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Abstract

As a possible contribution to the COSMOS mission to expand the use and application of strong-motion data, a virtual, Web-based data center is being created. The database will include data from COSMOS cooperating networks, which currently includes the California Strong Motion Instrumentation Program, the U.S. Geological Survey, the Army Corps of Engineers, and the U.S. Bureau of Reclamation. If accepted by COSMOS, the database would be managed under COSMOS.

The database has been created, and methods of access through the World Wide Web are under development. Currently, the database includes 740 three-component accelerogram records. The database structure consists of twelve tables, allowing for data about the accelerogram records, earthquakes, recording sites, instruments, networks, and station owners to be stored. The database also allows for all items in- the database to have a comment or scientific reference attached to them.

The database has been created using Microsoft SQLServer7 and is running on a 450 MHz PC. Two mirror sites are planned. The database access software is being written in the programming languages Java and Perl. These languages were chosen so that the software will be portable across database and operating system platforms. Multiple Web access methods are being developed to allow searching of the database from earthquake, station, or accelerogram record parameters. Users will be able to select data from lists of earthquakes or stations, to query the database through Web forms pages, or to select data from dynamically created maps.