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World View
CTBT Status of Signature and Ratification
Signatory States (..)
Signatory States (Ratifying States (..)
Ratifying States (Non-Signatory States (..)
Non-Signatory States (
The use of particular designations of countries or territories does not imply any judgement by the Commission as
to the legal status of such countries or territories, of their authorities and institutions or of the delimitation
of their boundaries. The dotted line on the maps represents approximately the Line of Control in Jammu and Kashmir
agreed upon by India and Pakistan. The two countries have not agreed upon the final status of Jammu and Kashmir.
International Monitoring System
All Facilities
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Primary Seismic
Auxiliary Seismic
Infrasound
Hydroacoustic
Radionuclide
Radionuclide with Noble Gas *
*) The CTBTO has been equipping 40 of the 80 radionuclide stations with noble gas monitoring technology on an
experimental basis since 1999. [More info ...]
Radionuclide LaboratoriesLocations of Nuclear Explosions**) Site of a nuclear explosion: defined as a location where one or several countries have detonated at least one nuclear bomb either for military or peaceful purposes.
Nuclear Weapons used in World War II, August 1945
Test Sites:
 USA  USSR  UK  France |
 China  India  Pakistan  DPRK |
The figures used in this map are approximate and based on official government sources, as well as on information provided by research institutions such as the Natural Resources Defence Council in Washington D.C., and the Stockholm International Peace Research Institute (SIPRI).
Time Line
