Accession Number:

ADA063923

Title:

The Norwegian Seismic Array (NORSAR). Phase 3

Descriptive Note:

Final technical summary 1 Apr-30 Sep 1978

Corporate Author:

ROYAL NORWEGIAN COUNCIL FOR SCIENTIFIC AND INDUSTRIAL RESEARCH KJELLER

Personal Author(s):

• Rieber-Mohn, D.

Report Date:

1978-10-31

Pagination or Media Count:

79.0

Abstract:

This report describes the operation and research activities at the Norwegian Seismic Array NORSAR for the time period from 1 April to 30 September 1978. In general, the array operation is characterized as stable, with little change from the previous reporting period. There has been a slight improvement in the performance of the data recording and online detection processing relative to the previous reporting period uptime increased to 93.7 from 91.6. The Special Processing System SPS is still the major cause of the breaks in operation 75 out of 139, the longest one lasting for more than 4 days. Statistics from short sample intervals indicate that the number of Online detections average about 200 per day with the present threshold setting, while the On-line Event Processor processes about 25 events per day for transmission to the SDAC. The average number of analyst-retrieved and accepted events has been 10.8 per day during the period.

Descriptors:

• *DATA PROCESSING
• *SEISMIC ARRAYS
• COMPUTER COMMUNICATIONS
• DATA PROCESSING EQUIPMENT
• DATA PROCESSING TERMINALS
• EARTHQUAKES
• MESSAGE PROCESSING
• NORWAY
• ONLINE SYSTEMS
• SEISMIC DATA
• SEISMIC DETECTION

Subject Categories:

• Seismology
• Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE