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comprehensive nuclear test ban treaty organization wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 status 2 preparatory commission 3 international monitoring system ims and communications infrastructure 4 consultation and clarification c c 5 on site inspection osi 6 confidence building measures 7 see also 8 references 9 external links toggle the table of contents comprehensive nuclear test ban treaty organization 9 languages العربية deutsch español français bahasa indonesia bahasa melayu norsk bokmål русский tiếng việt edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia international organization for the current activities regarding the ctbt see preparatory commission for the comprehensive nuclear test ban treaty organization part of a series on the united nations charter un system principal organs general assembly security council economic and social council international court of justice secretariat trusteeship council secretariat secretary general deputy secretary general under secretary general secretariat structure funds programmes and other bodies un development programmes undp unicef wfp unfpa unep un women un habitat humanitarian agencies ocha unhcr iom unrwa undrr specialized agencies development social fao ifad ilo unido unesco who wmo un tourism technical regulatory icao imo itu iaea upu wipo finance trade imf world bank group wto peace security dpo dppa pbc pbf unoda unoosa unodc unmas unoct ctc opcw ctbto prepcom research training unitar unrisd unidir unu unssc unicri human rights unhrc ohchr upr human rights committee cescr icerd cedaw cat crc special rapporteurs wgad membership members observers founding members full members security council permanent members permanent representatives to the un list general assembly observers european union history preceding years international telecommunication union universal postal union hague conventions of 1899 and 1907 permanent court of arbitration international office of public hygiene league of nations preparatory years declaration of st james s palace atlantic charter declaration by united nations moscow conference 1943 tehran conference bretton woods conference dumbarton oaks conference yalta conference uncio preparatory commission activities sustainable development goals peacekeeping missions governed territories unpol undrip universal declaration of human rights world heritage convention convention on the rights of the child declaration on the rights of peasants resolutions v t e the comprehensive nuclear test ban treaty organization ctbto is an international organization that will be established upon the entry into force of the comprehensive nuclear test ban treaty a convention that outlaws nuclear test explosions its seat will be in vienna austria the organization will be tasked with verifying the ban on nuclear tests and will operate therefore a worldwide monitoring system and may conduct on site inspections the preparatory commission for the ctbto and its provisional technical secretariat were established in 1997 and are headquartered in vienna austria status edit the comprehensive nuclear test ban treaty will enter into force 180 days after the treaty has been ratified by 44 states listed in annex 2 of the treaty which were designated to have a nuclear reactor or at least some advanced level of nuclear technology as of november 2023 41 of these annex 2 states have signed the treaty and 35 have ratified india north korea and pakistan have not signed or ratified the treaty china egypt iran israel and the united states have signed but have not ratified while russia signed and ratified the treaty but subsequently withdrew its ratification prior to its entry into force 1 the organization s scientific reporting claims 2 4 million persons will eventually die from cancers developed as a result of atmospheric atomic tests conducted between 1945 and 1980 2 preparatory commission edit main article preparatory commission for the comprehensive nuclear test ban treaty organization the preparatory commission was established in 1997 and is tasked with making preparations for effective implementation of the treaty in particular by establishing its verification regime the main task is establishing and provisionally operating the 337 facility international monitoring system ims including its international data centre idc and global communications infrastructure gci the commission is tasked also with the development of operational manuals including a manual to guide conduct of on site inspections international monitoring system ims and communications infrastructure edit radionuclide station on schauinsland in germany see also comprehensive nuclear test ban treaty organization preparatory commission global communications infrastructure gci and international data centre idc the ims when completed will consist of 50 primary and 120 auxiliary seismic monitoring stations 11 hydro acoustic stations detecting acoustic waves in the oceans 60 infra sound stations using microbarographs acoustic pressure sensors to detect very low frequency sound waves 80 radionuclide stations using air samplers to detect radioactive particles released from atmospheric explosions and or vented from underground or under water explosions 16 radionuclide laboratories for analysis of samples from the radionuclide stations data from all stations are transmitted to the ctbto international data centre idc in vienna through a global private data network known as gci which is largely based on satellite vsat links states parties will have equal and direct access to all ims data raw or processed for verification as well as civilian uses the preparatory commission has started the building and verification of the system of which as of 2023 update about 90 was operational 3 consultation and clarification c c edit states parties to the treaty are encouraged to conduct a consultation and clarification process c c before requesting an on site inspection the state that has concerns about an ambiguous event should whenever possible make any effort to clarify it through consultations with the state in whose territory this event occurred either directly or through the organization on site inspection osi edit if an event detected by the ims or by other means raises concerns about violation of the basic obligations of the ctbt an osi may be conducted to clarify whether a nuclear explosion has taken place such an inspection could take place only after entry into force of the treaty and would require agreement by at least 30 of the 51 members of the ctbto s executive council an inspection area of up to 1000 square kilometres would be searched by a team of inspectors up to 40 only state parties to the treaty may submit a request for an osi when conducting an osi a number of detection techniques can be used these techniques include position finding visual observation passive seismic measurements and radioactivity measurements including gamma radiation and radioactive noble gases such as argon 37 and isotopes of xenon for an initial period of up to 25 days further for a continuation period of up to 60 days more intrusive measurements can be used on site including active and resonance seismic measurements as well as ground penetrating radar gravity and electric and magnetic field mappings argon 37 field measurement is a unique technology specially developed for the purpose of osi drilling to obtain radioactive samples from a suspected underground explosion site is also allowed data collected from various methods have to be fused and interpreted for decision making purposes an important task of the ctbto is to explore how recent scientific and technical advances in these technologies can be applied to an osi 4 confidence building measures edit in addition to the ims c c and osi the verification regime of the ctbt includes also the fourth element of confidence building measures this requires states parties to the treaty to notify the organization if possible in advance of any chemical explosion using 300 tonnes or greater of tnt equivalent blasting material to be detonated this is required in order to contribute to the timely resolution of any compliance concerns and to assist in the calibration of ims stations see also edit global security institute references edit comprehensive nuclear test ban treaty united nations treaty collection 2013 02 24 archived from the original on 2017 06 21 retrieved 2013 02 24 child david 10 december 2017 nuclear weapons in conversation with ican al jazeera website retrieved 10 december 2017 dubious discuss the international monitoring system ctbto the final verification measure archived from the original on 2012 05 22 retrieved 2009 06 14 external links edit wikimedia commons has media related to comprehensive nuclear test ban treaty organization official website retrieved from https en wikipedia org w index php title comprehensive_nuclear test ban_treaty_organization oldid 1357799644 categories intergovernmental organizations established by treaty comprehensive nuclear test ban treaty international organisations based in austria hidden categories articles with short description short description is different from wikidata all accuracy disputes articles with disputed statements from december 2017 articles containing potentially dated statements from 2023 all articles containing potentially dated statements commons category link is on wikidata this page was last edited on 4 june 2026 at 19 19 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents comprehensive nuclear test ban treaty organization 9 languages add topic