Information Materials IMS Map The IMS Interactive Map allows you to view all countries status', stations, and previous nuclear blasts. Brochures and Factsheets Find information on the CTBTO including the IMS, Verification Regime, Civil and Scientific Applications, and more. Annual Reports Find all annual reports from 2000 to the present in six languages. Spectrum Spectrum is the CTBTO periodic magazine which spotlights various topics relating to the Comprehensive Nuclear-Test-Ban Treaty (CTBT) within the nuclear non-proliferation and disarmament framework. Glossary The CTBTO glossary contains a plethora of information relating to key terms used throughout the website. Frequently Asked Questions (FAQs) Find answers to commonly asked questions about CTBTO and our work.