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The Comprehensive Nuclear-Test-Ban Treaty Development of the Seismic Networks of the

This article discusses the comprehensive nuclear test ban treaty and the development of the seismic networks of the International Monitoring System. It provides information on the primary and auxiliary seismic stations, as well as the automation and operational requirements of the system.

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The Comprehensive Nuclear-Test-Ban Treaty Development of the Seismic Networks of the

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  1. The Comprehensive Nuclear-Test-Ban Treaty Development of the Seismic Networks of the International Monitoring System Lassina Zerbo Director, International Data Centre Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organisation Provisional Technical Secretariat Vienna International Centre P.O. Box 1200 A-1400 Vienna IASPEI Cape Town, South Africa AUSTRIA 11 January 2009

  2. IMS Seismic Networks • 50 primary stations sending data to Vienna • in real time, continuous mode • 30 array stations • 19 3-C stations • 1 to be determined • 120 auxiliary stations ready to respond to • requests from IDC to help characterize • the detected event • 7 array stations • 112 3-C stations • 1 to be determined

  3. Processes Site surveys Site preparation Installation Certification Post-certification Activities New low seismic noise model

  4. Seismic Noise at PS26 Torodi, Niger

  5. PS26 Torodi, Niger

  6. The IMS equipment (GCI Communication topologies) BASIC Topology IDC Vienna NDC IMS station INDEPENDENT Topology NDC fully controls data flowto IDC IDC Vienna NDC IMS station International Monitoring System Division

  7. Primary Seismic Network

  8. Auxiliary Seismic Network

  9. Hydroacoustic Network

  10. Infrasound Network

  11. IMS Seismic and Hydro Networks Standardized stations Calibrated stations 98% of data availability 97% timely data availability • 11 hydroacoustic stations • 6 hydrophone stations • 5 T-phase stations (essentially seismic sensors)

  12. CTBT on Funding ofOperation and Maintenance Article IV (Verification) of the Treaty: 19. For facilities … in Tables 1-A, 2-A, 3 and 4 of Annex 1 to the Protocol [ie Primary stations], … the Organization.. shall meet the costs of: (b) Operating and maintaining International Monitoring System facilities… (c) Transmitting International Monitoring System data 20. For auxiliary network seismic stations .. the Organization,.. shall meet the costs only of: (a) Transmitting data..; (b) Authenticating data …; (c) Upgrading stations to the required technical standard…; (d) If necessary, establishing new stations

  13. AUTOMATION International Operational Concept Monitoring System SUPPORT ENGINEERING OPERATIONS GCI OPERATION CENTER SOH Monitoring Tracking STATION STATION STATION INSTALLATION MONITORING FACILITIES • INFRASTRUTURE ENGINEERING • MAINT OPERATIONS CERTIFICATION GROUP • OFFICE GROUP UNIT • LOGISTIC AUTOMATION & NDC INFORMATION NETWORK & SYSTEM OPERATIONS UNIT IDC

  14. IMS Operational Requirements Levels of Operations Entry-into-Force (EIF) Provisional Operations Enhanced Operations (System-Wide Performance Test) EIF annual availability requirements Primary waveform stations: 97% timely data availability 98% overall data availability Radionuclide stations: 95% data availability Auxiliary seismic stations: 90% data availability Communication link availability specification of contract 99.5% 98% Int. Cooperation Workshop, Abuja

  15. IMS Provisional Operations •Verification System is in Provisional Operations • Scope and period defined by Commission (CTBT/PC-19/1/Annex II P12-19): - Provisional Operations does not provide for verification - Protect the investment; efficient and effective utilization - Allow build up, testing and evaluation - ‘Best Effort’ within available resources e.g. normal working hours - Provide for Performance Testing in cooperation with station operators and NDCs. - The Provisional Operations Status is linked to the Current Status of the CTBT…….

  16. Network processing in context IDC/SA/SI

  17. 16 Apr 2002 event (presumed earthquake) 9 Oct 2006 event (presumed explosion) Map of all the events included in the IDC REBs since February 2000 around the Korean peninsula 16 Apr 2002 event 9 Oct 2006 event

  18. Summary on IDC Secure Website

  19. Seismic signals recorded in South Korea (KSRS) for 9 Oct 2006 event (left) and 16 Apr 2002 event (right) 16 April 2002 (presumed earthquake) 9 October 2006 More explosion-like More earthquake-like - But in general, discrimination of (especially small) explosions from earthquakes is a complex task.

  20. Thank you Animated motion of the emitted gas from 9 to 30 October 2006 (0-30m altitude)

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