Accession Number : ADA307496

Title :   Semiannual Technical Summary, 1 April - 30 September 1994 (Royal Norwegian Council for Scientific and Industrial Research).

Corporate Author : ROYAL NORWEGIAN COUNCIL FOR SCIENTIFIC AND INDUSTRIAL RESEARCH KJELLER

PDF Url : ADA307496

Report Date : NOV 1994

Pagination or Media Count : 136

Abstract : This Semiannual Technical Summary describes the operation, maintenance and research activities at the Norwegian Seismic Array (NORSAR), the Norwegian Regional Seismic Array (NORESS), the Arctic Regional Seismic Array (ARCESS) and the experimental Spitsbergen Regional Array for the period for the period 1 April - 30 September 1994. Statistics are also presented for additional seismic stations, which through cooperative agreements with institutions in the host countries provide continuous data to the NORSAR Data processing Center (NDPC). These stations comprise the Finnish Experimental Seismic Array (FINESS), the German Experimental Seismic Array (GERESS), and an experimental regional seismic array in Apatity, Russia. This Semiannual Report also presents statistics from operation of the Intelligent Monitoring System (IMS). The IMS has been operated in an experimental mode, with continuous automatic detection and location and with analyst review of selected events of interest. Since October 1991, a new version of the IMS that accepts data from an arbitrary number of arrays and single 3-component stations has been operated. The NORSAR Detection Processing system has been operated throughout the period with an average uptime of 99.3% as compared to 98.3% for the previous reporting period. A total of 2015 seismic events have been reported in the NORSAR monthly seismic bulletin. The performance of the continuous alarm system and the automatic bulletin transfer by telex to AFTAC has been satisfactory. The system for direct retrieval of NORSAR wave-form data through an X.25 connection has been used successfully for acquiring such data by AFTAC. Processing of requests for full NORSAR and regional array data on magnetic tapes has progressed according to established schedules.

Descriptors :   *SEISMIC DETECTION, *SEISMIC ARRAYS, DATA BASES, ALGORITHMS, SOFTWARE ENGINEERING, NUCLEAR EXPLOSIONS, OPTIMIZATION, SYSTEMS ENGINEERING, AUTOMATION, DATA MANAGEMENT, INFORMATION TRANSFER, MONITORING, REAL TIME, UNDERGROUND EXPLOSIONS, SEISMIC DATA, COMMUNICATIONS NETWORKS, DATA REDUCTION, INFORMATION RETRIEVAL, SEISMIC WAVES, DATA ACQUISITION, ARTIFICIAL INTELLIGENCE, NUCLEAR EXPLOSION DETECTION, SEISMIC DISCRIMINATION, ONLINE SYSTEMS, NORWAY, ARCTIC REGIONS, WARNING SYSTEMS, SEISMOLOGICAL STATIONS, SEISMOMETERS.

Subject Categories : Seismology
      Seismic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE