Accession Number : ADA322284

Title :   Interactive World Wide Web Page for Custom Event Screening at the Prototype International Data Center.

Descriptive Note : Scientific rept. no. 2,

Corporate Author : MISSION RESEARCH CORP NEWINGTON VA

Personal Author(s) : Fisk, Mark D. ; Carlson, Richard J. ; Burlacu, Valeriu ; McCartor, Gary D.

PDF Url : ADA322284

Report Date : SEP 1996

Pagination or Media Count : 49

Abstract : This report describes statistical event characterization tools and related data products being implemented at the Prototype International Data Center (PIDC) in Arlington, Virginia. Preliminary event screening analyses at the PIDC currently utilize seismic measures of location, depth, mb-Ms, and their uncertainties, as well as regional high-frequency amplitude ratios. To make these tools and data products accessible to remote users, interactive World Wide Web pages have been implemented for custom event screening. These Web pages provide a preliminary capability for users to select and analyze events based on event characterization parameters and user-defined screening criteria. A wide range of maps and other displays of the data and screening results are provided. These tools allow the user to process, view and download customized event characterization data products and graphics over the Internet. Two basic services are described: (1) an interactive event screening service which allows custom criteria to be provided and applied during an on-line session; and (2) a subscription service utilizing user-specified event screening criteria that remain in affect until they are changed by the user. Examples of how to access and use the Web pages, as well as applications to GSETT-3 data, are presented for the two types of services. A preliminary assessment of the event characterization capability at the PIDC, over time, is also presented. Results are described of an application to seismic events in Eurasia that occurred between 1 June and 31 July 1996. These events include two underground nuclear explosions at the Lop Nor test site in China and provide a useful test of the event screening tools.

Descriptors :   *DATA BASES, *SEISMIC DATA, *INTERACTIVE GRAPHICS, *INTERNET, SOFTWARE ENGINEERING, NUCLEAR EXPLOSIONS, INFORMATION EXCHANGE, COMPUTER COMMUNICATIONS, UNDERGROUND EXPLOSIONS, OPTICAL COMMUNICATIONS, INFORMATION RETRIEVAL, SEISMIC WAVES, COMPUTER GRAPHICS, COMPUTER APPLICATIONS, MAN COMPUTER INTERFACE, ONLINE SYSTEMS, OPTICAL PROCESSING, SEISMOLOGICAL STATIONS, GRAPHICAL USER INTERFACE.

Subject Categories : Computer Systems
      Seismology
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE