Iran earthquake prompts investigation amid nuclear test speculation The possibility that a nuclear test is being discussed at high levels in Iran as Israel threatens to target Tehran’s energy infrastructure On 5 October 2024, a 4.5-magnitude seismic event occurred in Iran’s Semnan province, sparking speculation that Iran has tested a nuclear weapon for the first time. Such a seismic event is typically the result of an earthquake, but speculation has arisen on social media suggesting the event was instead an underground nuclear test carried out by the Islamic Republic in response to Israeli threats to bomb...