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The Norwegian Seismic Array (NORSAR). Phase 3.

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Scientific rept. for 1 Apr-30 Sep 95,

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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 1995. 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, the Hagfors array in Sweden and an experimental regional seismic array in Apatity, Russia. The NORSAR Detection Processing system has been operated throughout the period April - August 1995 with an average uptime of 99.1 as compared to 99.6 for the previous six-month period. During September 1995, the NORSAR array was out of continuous operation due to the final refurbishment effort. Backup during this period was provided by the NORESS array, colocated with NORSAR subarray 06C. NORESS continued to be in full operation during the refurbishment work. A total of 2027 seismic events have been reported in the NORSAR monthly seismic bulletin for April - August 1995. The performance of the continuous alarm system and the automatic bulletin transfer to AFTAC has been satisfactory. The system for direct retrieval of NORSAR waveform 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. This Semiannual Report also presents statistics from operation of the Intelligent Monitoring System IMS. AN

Subject Categories:

  • Seismology
  • Seismic Detection and Detectors

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