Semiannual Technical Summary, 1 October 1997-31 March 1998

• Other Authors: NORWEGIAN SEISMIC ARRAY (NORSAR) KJELLER
• Format: Text
• Language: English
• Published: 1998
• Subjects: Seismology; Seismic Detection and Detectors; *SEISMIC DETECTION; *SEISMOLOGICAL STATIONS; RESEARCH FACILITIES; NORWAY; SEISMIC ARRAYS; FOREIGN REPORTS; Apatity; Arctic; Hagfors; Norway; Spitsbergen
• Online Access: http://www.dtic.mil/docs/citations/ADA350005; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA350005

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 Spitsbergen Regional Array for the period 1 October 1997 - 31 March 1998. 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 Regional Seismic Array (FINESS), the German Regional Seismic Array (GERESS), the Hagfors array in Sweden and the regional seismic array in Apatity, Russia. The NORSAR Detection Processing system has been operated throughout the period with an average uptime of 99.77%. A total of 2196 seismic events have been reported in the NORSAR monthly seismic bulletin for October 1997 through March 1998. The performance of the continuous alarm system and the automatic bulletin transfer to AFTAC has been satisfactory. Processing of requests for full NORSAR and regional array data on magnetic tapes has progressed according to established schedules. This Semiannual Report also presents statistics from operation of the Regional Monitoring System (RMS). The RMS has been operated in a limited capacity, with continuous automatic detection and location and with analyst review of selected events of interest for GSETT-3. Data sources for the RMS have comprised all the regional arrays processed at NORSAR. The Generalized Beamforming (GBF) program is now used as a pre-processor to RMS. NORSAR-CONTRIB-638