Nuclear weapons testing/warhead stockpile data since 1945.
Data is from armscontrol.org, ourworldindata.org, and wikipedia.org.
Made with matplotlib in python.
Yields for nuclear tests are self reported from governments/estimates from other countries. A very small number of nuclear tests have been conducted underwater or in the upper atmosphere, these are considered atmospheric tests.
by graphsarecool
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Source: [armscontrol.org](http://armscontrol.org), [ourworldindata.org](http://ourworldindata.org), wikipedia.org. Tools: Python with matplotlib and NumPy.
“Notable Nuclear *Tests*”
– Fat Man
– Little Boy
As of early 2026, the United States has accused China of conducting secret, low-yield nuclear tests at its Lop Nur test site in violation of the “zero-yield” Comprehensive Nuclear-Test-Ban Treaty (CTBT). U.S. officials alleged a test occurred on June 22, 2020, and that China uses methods like “decoupling” to hide blast activity. China has dismissed these allegations as groundless.