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US Cites Seismic Data to Bolster China Nuclear Test Claim

The U.S. cited seismic data linking China’s 2020 underground nuclear test to its expanding arsenal of 600 warheads, while planning to resume testing to maintain parity.

  • On Tuesday, Christopher Yeaw said the United States is ready to match alleged Chinese low-yield tests, citing `As the president has said, the United States will return to testing on a-- quote-- 'equal basis,'` at the Hudson Institute.
  • A remote seismic station in Kazakhstan recorded a 2.75-magnitude event on June 22, 2020 near Lop Nur, China's main nuclear test site, with Christopher Yeaw saying `There is very little possibility that it is anything other than an explosion, a singular explosion`.
  • Independent analysts cautioned the signal was weak and inconclusive, the Comprehensive Nuclear‑Test‑Ban Treaty Organization said it detected no nuclear test, and Lin Jian called the U.S. accusation `completely groundless`.
  • With New START expired on February 5, the U.S. is considering matching alleged Chinese low-yield tests, potentially impacting nuclear arms control efforts.
  • Given that China has only 45 tests, its arsenal nearing 600 warheads and aiming for 1,000 by 2030, Yeaw said, `The treaty becomes basically a fig leaf`.
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Stars and Stripes broke the news in Washington, United States on Tuesday, February 17, 2026.
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