The objective of the workshop is to support the CTBTO verification regime by creating a forum for scientific knowledge exchange on four main themes and their topics:
Theme 1: Hydroacoustic monitoring networks in support of the CTBT International Monitoring System
1.1 The CTBTO Hydroacoustic Monitoring Network: Status, challenges, and needs
1.2 Engineering and technological advancements for hydroacoustic monitoring networks in marine environments
1.3 Station installation, maintenance, and major underwater repair strategies in challenging marine environments
1.4 Sustainability, reliability, and long-term performance of hydroacoustic monitoring networks
1.5 End-to-end calibration and quality assurance of hydroacoustic monitoring stations under field conditions
1.6 Protection, inspection, and fault detection strategies for subsea cables and sensors supporting hydroacoustic monitoring stations
1.7 Potential synergies with other subsea monitoring networks and civil and scientific applications
Theme 2: Emerging technologies and future concepts for next-generation hydroacoustic monitoring stations in support of the CTBT International Monitoring System
2.1 Station design concepts, structural and material innovations, and hydrophone technologies for next-generation hydroacoustic monitoring
2.2 Distributed Acoustic Sensing (DAS) and fiber-optic technologies for hydroacoustic monitoring
2.3 Smart subsea cable concepts and multi-functional sensing technologies
Theme 3: Data analysis and signal processing methods for CTBT verification purposes and civil and scientific applications
3.1 Identification of signal source-type (seismological-phase classification)
3.2 Improved event-location algorithms
3.3 Advanced signal processing methods for characterization of event properties (e.g. deduction of event depth from T-phase spectral contents)
Theme 4: Modelling for long-range hydroacoustic signal propagation
4.1 Three-dimensional acoustic propagation modelling.
4.2 Crust-water coupling near coastal seismometers
As always, CTBT-related contributions on additional relevant topics are also welcome.
Objectives
Participants Profile
Application Procedures
Applicants are requested to register online at the Commission’s CTNW platform: https//ctnw.ctbto.org
NDC technical staff are invited to submit their applications for this training through established official channels (their Permanent Missions to the CTBTO or Ministries of Foreign Affairs).
Registration Form
Applicants are requested to use the enclosed registration forms, which are also available at https://www.ctbto.org/news-and-events/capacity-building-and-training. Applications will be reviewed, and applicants will be notified accordingly.
However, pending the official nomination, participants may submit their registration via email, once it has been approved by the Director/Head of the institution, in order to allow the Provisional Technical Secretariat (PTS) to make timely travel and accommodation arrangements
Objectives
In coordination with the software modernization under the IDC SHI Reengineering project, the Provisional Technical Secretariat (PTS) has established series of Alpha Tester Group (ATG) to enhance the engagement of the NDC community towards the project. It allows low-barrier access for State Signatories and NDCs to the current state of the modernized components of the system.
The role of the ATG participants is to validate the results of the system and provide feedback on the system design and usability.
The objectives of the Kick-off Meeting prior to the testing session are to:
The ATG 2026 will focus on the evaluation of the latest version of the Interactive Analysis Interface (IAN) and new event location algorithm LocOO3D.
Participation Profile
NDCs involved in Alpha Testing activities are expected to make time available for the ATG Members to perform the related activities. It is estimated that each ATG member will need to devote between 3 and 5 days to ATG activities in 2026.
Staying Up to Date on ETA and SPS Procedures and Developments;
Join us for an informative webinar where you will be updated on the latest status of procedures for Expert Technical Analysis (ETA) and Special Studies (SPS), as well as the ongoing work to gather the methods and software at the IDC to be used in such Special Analysis.
Attend this webinar to:
1. Stay informed about the latest procedures and requirements for ETA and Special Studies
2. Understand the current state of developments and their impact
3. Engage with our experts and ask questions in a live Q&A session
4. Get involved in shaping the content for the next live workshop
Objectives:
Participation Profile
The workshop is targeted at scientific experts, NDC technical staff and analysts, and prospective scholars who seek a common goal in building a capacity for scientific knowledge exchange to strengthen the Atmospheric Transport Modelling community affiliated to CTBTO’s verification regime. The workshop’s objectives are:
Topics of interest:
CTBT-related contributions on additional relevant topics are welcome.
The workshop will:
Station Operators, local operators, NDC staff, contractors and equipment suppliers involved in the operation and maintenance of the IMS.
The main themes of the O&M 2026 Workshop will be:
The 2026 National Data Centre (NDC) Workshop is being organized by the Provisional Technical Secretariat (PTS) of the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) in cooperation with the Government of Uruguay. The NDC workshop provides an opportunity for participants from State Signatory NDCs to meet and discuss their activities and share experiences accessing IMS data, using IDC products, and operating as an NDC. The objectives of the workshop are: 1. Provide an environment for NDC experts to share their experiences in fulfilling their verification responsibilities; 2. Provide NDC feedback to the PTS on all aspects of the data, products, services and support provided to NDCs; under this objective, particular emphasis will be put on • NDC contributions to Performance Monitoring and Testing (through NDC Preparedness Exercises, or NPEs, and other means); • Discussions on NDC involvement in the IDC Progressive Commissioning; • Discussion of recent and ongoing IDC projects. 3. Review NDC recommendations; 4. The progress and initial results of the NDC Preparedness Exercise 2026 (NPE26) will be presented and discussed, including analysis of the NPE26 event using IMS Data and other data obtained by national means. 5. Contributions on the interaction between NDCs and research and development-related topics will be discussed. 6. Discuss progress on the NDCs4ALL initiative. 7. Discuss challenges faced by NDCs.
1. Practice the whole workflow of event analysis from initial detection to national reporting. 2. Demonstrate the utility of IMS data, national data, and fusion methods in a verification context. 3. Strengthen regional cooperation and data exchange between NDCs. 4. To harmonize the approaches of States' Signatories participating in and benefiting from the CTBT verification system.
