Coverage dated July 14, 2026 to July 15, 2026

US expert on underground nuclear tests detained in China for 18 months

Headline from KESQ Palm Springs, on the newest of 2 developments

By Mike Valerio, Simone McCarthy, CNN Beijing (CNN) — An American scientist who has studied underground nuclear tests has been detained in China for more than 18 months on spying charges, according to his supporters and a US lawmaker.

KESQ Palm Springs's own description from its feed. We collect headlines and these descriptions, not full articles; read the original reporting below.

Developments in this update

2 dated developments, oldest first, newest marked. Each is named by one outlet's own headline; open its reports to see every outlet that covered it.

  1. Family says US seismologist has been detained in China for nearly 2 years with no trial

    Headline from WFMZ Allentown ·

  2. Newest

    US expert on underground nuclear tests detained in China for 18 months

    Headline from KESQ Palm Springs ·

1 report not tied to one development ·

Reports & sources

18 articles, oldest first.

  1. CBS News

    China rejects report that a U.S. scientist is being wrongfully detained (opens CBS News)

    Published

    CBS News's feed description

    Asked about the case of U.S. national Youlin Chen, China's foreign ministry said there was no "wrongful detention," but it did not deny the scientist was imprisoned.

  2. The Republic

    US scientist held in China for nearly 2 years, family reveals, in a case Trump has raised with Xi (opens The Republic)

    Published

    The Republic's feed description

    WASHINGTON (AP) — A China-born American seismologist has been detained in China without trial for nearly two years, an advocacy group advising the family said Tuesday, a revelation that came a couple of months before Chinese President Xi Jinping is expected to visit the U.S.

  3. Courthouse News Service

    Family says US seismologist has been detained in China for nearly 2 years with no trial (opens Courthouse News Service)

    Published

    Courthouse News Service's feed description

    Youlin Chen is the only U.S. citizen determined by the State Department to be wrongfully detained in China, according to the nonprofit Global Reach.

  4. New York Post

    US seismologist who studied North Korean nukes detained in China, wife fights ‘unjust’ charges (opens New York Post)

    Published

    New York Post's feed description

    An American seismologist who spent his career studying North Korean nuclear tests has been locked up in China for years and is expected to be hauled in front of a court over spying charges, his wife and advocates said. Youlin Chen, 54, was cuffed by Chinese authorities on Nov.

  5. BBC News

    China detains US scientist who studied North Korea nuclear tests (opens BBC News)

    Published

    BBC News's feed description

    Chen Youlin's family says he has been wrongfully detained for nearly two years on spying charges.

  6. The Guardian

    China has detained US nuclear seismology expert since 2024, family reveals (opens The Guardian)

    Published

    The Guardian's feed description

    Beijing may be using Youlin Chen’s knowledge to devise ways of staging nuclear tests without detection, advocates for his release from spying charges suggest An American seismologist has been detained in China on espionage charges since 2024, his family has revealed, saying Donald Trump’s direct app…

  7. KESQ Palm Springs

    US expert on underground nuclear tests detained in China for 18 months (opens KESQ Palm Springs)

    Published

    KESQ Palm Springs's feed description

    By Mike Valerio, Simone McCarthy, CNN Beijing (CNN) — An American scientist who has studied underground nuclear tests has been detained in China for more than 18 months on spying charges, according to his supporters and a US lawmaker.

  8. Local News 8

    US expert on underground nuclear tests held in China for 18 months (opens Local News 8)

    Published

    Local News 8's feed description

    By Mike Valerio, Simone McCarthy, CNN Beijing (CNN) — An American scientist who has studied underground nuclear tests has been detained in China for more than 18 months on spying charges, according to his supporters and a US lawmaker.

Identical headlines usually mean shared wire copy. They are counted as separate articles but are not independent confirmation.

US expert on underground nuclear tests detained in China for 18 months | Since Then