Norwegian Seismic Array (NORSAR)

• Main Author: Bungum, H
• Other Authors: ROYAL NORWEGIAN COUNCIL FOR SCIENTIFIC AND INDUSTRIAL RESEARCH KJELLER
• Format: Text
• Language: English
• Published: 1977
• Subjects: Seismology; *SEISMIC ARRAYS; DATA PROCESSING; DATA PROCESSING EQUIPMENT; EARTHQUAKE WARNING SYSTEMS; GLOBAL; MAINTENANCE; NORTH ATLANTIC OCEAN; NORWAY; OCEAN ENVIRONMENTS; OCEANIC CRUST; SEISMOMETERS; SIGNAL PROCESSING; UNMANNED; Norway; North Atlantic
• Online Access: http://www.dtic.mil/docs/citations/ADA040422; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA040422

This report describes the operation and research activities at the Norwegian Seismic Array (NORSAR). The operation of the array in this period was dominated by the effects of the change from 22 to 7 subarrays. There have been 232 breaks in the operation of the Detection Processor (DP), 121 of which were due to SPS malfunctioning. Moreover, many of the breaks are tied to tests and software changes connected to the transition to a 7 subarray operation. The uptime has nevertheless been 95.5%, which is quite good in consideration of the fact that operation is now unmanned except for weekday daytimes. Part of the explanation for this is an effective countermeasure in terms of an automatic telephone warning system triggered by DP stops. The regular array maintenance activity was kept at its usual level, and the monitoring schedule was adapted to the new array configuration.