Progress Report NORSAR Phase 3
Quarterly rept. no. 3, 1 Jul-30 Sep 1974
ROYAL NORWEGIAN COUNCIL FOR SCIENTIFIC AND INDUSTRIAL RESEARCH KJELLER
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The report covers operation and research activities at the Norwegian Seismic Array NORSAR in the period 1 Jul - 30 September 1974. The performance of the field instrumentation and computer installations has been stable with a normal amount of corrective maintenance. The ARPANET terminal is used routinely for data exchange. In the Event Processor a new program package which will calculate optimal beamforming weights for some selected unclear detections is in progress. In the Detection Processor a floating threshold procedure is in development. In connection with this a study of the seasonal and diurnal noise variance fluctuations and their effect on earthquake detectability has been finished. It has further been shown that the short-periodic seismic noise at NORSAR can be described by autoregressive models.
- Seismic Detection and Detectors