As tensions between the US and North Korea rise, a global threat warning service posted an update that North Korea may have tested a nuclear device. The warning, the result of a minor earthquake, has been removed, but the coincidences surrounding the event underscore the hair-trigger nature of the situation, and how a poorly-timed natural event can raise a nuclear alert.

The National Association of Radio Distress-Signalling and Infocommunications (RSOE), a Hungarian governmental organization based in Budapest, reports on earthquakes, wildfires, ecological disasters, epidemic hazards, and any other threat to the public. The organization, a highly respected source of information, published an update on Tuesday showing a possible nuclear threat in North Korea.

Kim Sung-han, a Seoul-based weatherman, reported the quake on Twitter saying it covered a 3km area. #NorthKorea https://t.co/uaql3Wsb7d pic.twitter.com/ifQfC261er

— Christina Consolo (@RadChick4Cast) August 15, 2017

The report has since been updated to reflect that no nuclear threat exists. The warning was originally posted as a result of a naturally-occurring earthquake that happened to appear at a time and place that raised concerns.

The announcement comes at a time when tensions are high between North Korea and the United States. Just last week, Kim Jong-Un, North Korea’s supreme leader, issued a warning to the US threatening a nuclear attack.

“The US should [remember], however, that once there observed a sign of action for ‘preventive war’ from the US, the army of the Democratic People’s Republic of Korea (DPRK) will turn the US mainland into the theater of a nuclear war before the inviolable land of the DPRK turns into one,” the North Korean military announced in a statement in state-run KCNA news.

The nuclear threat posted by the Hungarian service was especially disconcerting since it came on National Liberation Day, marking the victory over Japan in World War 2. North Korea frequently runs nuclear tests and intercontinental ballistic missile (ICBM) tests on such holidays.

The nuclear alert was the result of an 2.6 magnitude earthquake in North Hwanghae Province, 80 miles from North Korea’s Punggye-ri Nuclear Test Facility. This raised some eyebrows since underground nuclear tests are usually detected as seismic activity.

Zsolt Boszormenyi, who runs the Emergency and Disaster Information Service (EDIS) of RSOE, emphasized that the event was listed on their site as a “suspected nuclear test”.

“We reported on the cause of the event section that supposedly a nuclear weapon test could have happened,”  Boszormenyi told Breaking Israel News. “We just show an event on our website. Relevant or interested organizations are responsible for checking the event. We did not say that the test was done.”