US Alleges China Conducted ‘Covert’ Nuclear Test a Week After Galwan Clash, Says Blast Was Hidden Using Seismic Masking Technique

Brief by Shorts91 Newsdesk / 01:38pm on 07 Feb 2026,Saturday International

The US has alleged that China carried out a secret nuclear explosive test in June 2020, days after the deadly Galwan Valley clash with India. US Under Secretary Thomas DiNanno told a UN forum that China conducted a yield-producing test on June 22, 2020, and used a method called “decoupling” to reduce seismic signals. He said the US was aware of Chinese tests “in the hundreds of tons” range. China rejected the claim and accused Washington of spreading a “China nuclear threat” narrative. The Comprehensive Nuclear-Test-Ban Treaty Organization said its monitoring system did not detect any nuclear test activity in China during that period. (PC: India Today)

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