This Euronews article investigates speculation about the potential connection between a recent earthquake in Iran's Semnan province and a possible secret underground nuclear test by the Iranian government. While some social media users believe the earthquake was caused by a nuclear test, Iranian officials dismiss these claims as "rumors." The article references a 2019 report from the Foundation for Defense of Democracies that identified a potential underground testing site in the area, adding fuel to the speculation. However, the article also acknowledges the earthquake-prone nature of Iran and the possibility that the tremors were unrelated to any nuclear activity.