Semiannual Technical Summary, 1 April-30 September 1990 (Royal Norwegian Council for Scientific and Industrial Research)

This summary describes the operation, maintenance and research activities at the Norwegian Seismic Array (NORSAR), the Norwegian Regional Seismic Array (NORESS) and the Arctic Regional Seismic Array (ARCESS). Statistics are also presented for additional seismic stations, which through cooperative ag...

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Bibliographic Details
Main Author: Loughran, L. B.
Other Authors: ROYAL NORWEGIAN COUNCIL FOR SCIENTIFIC AND INDUSTRIAL RESEARCH KJELLER
Format: Text
Language:English
Published: 1990
Subjects:
Computer Programming and Software
Seismic Detection and Detectors
Nuclear Weapons
*SEISMIC ARRAYS
*DATA PROCESSING
*SEISMIC DATA
*NUCLEAR EXPLOSION DETECTION
THRESHOLD EFFECTS
SEISMIC DETECTION
ESTIMATES
BEAM FORMING
INFORMATION CENTERS
RECORDING SYSTEMS
AGREEMENTS
INDUSTRIAL RESEARCH
ONLINE SYSTEMS
ARMY
NORWAY
AMPLITUDE
SEISMOLOGY
POLAND
GERMANY(EAST AND WEST)
ARCTIC REGIONS
PROCESSING
DETECTION
YIELD(NUCLEAR EXPLOSIONS)
SEISMOLOGICAL STATIONS
USSR
Arctic
Norway
Online Access:http://www.dtic.mil/docs/citations/ADA241670
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA241670
Description
Summary:This summary describes the operation, maintenance and research activities at the Norwegian Seismic Array (NORSAR), the Norwegian Regional Seismic Array (NORESS) and the Arctic Regional Seismic Array (ARCESS). 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. These stations comprise the Finish Experimental Seismic Array (FINESA), the German Experimental Seismic Array (GERESS), and two 3-component station in Poland. This report also presents statistics from operation of the Intelligent Monitoring System. The NORSAR detection processing system has been operated throughout the period with an average uptime of 98.0%. On-line detection processing and data recording at the NORSAR Data Processing Center of NORESS, ARCESS and FINESA data have been conducted. We have continued work aimed at evaluating the stability of RMS Lg for yield estimation purposes. The generalized beamforming technique developed by Ringdal and Kvaerna is now being applied to the network of 4 regional arrays (NORESS, ARCESS, FINESA, GERESS). The concept of threshold monitoring, introduced by Ringdal and Kvaerna, is a method of monitoring the seismic amplitude levels for the purpose of using this information to assess the largest size of events that might go undetected by a given network.

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