The U.S. Geological Survey has confirmed that Thursday morning's purported magnitude 5.9 earthquake near Dayton did not happen.
The purported temblor was initially listed on the USGS's website, but then later deleted.
On X, USGS says the alerts have been canceled and that they are "currently looking into why the alerts were issued."
.@USGS #ShakeAlert confirms that the earthquake alerts that were delivered at 8:06am are cancelled. There was no M5.9 earthquake near Carson City, NV. We are currently looking into why the alerts were issued. We'll provide more information when we learn more @Cal_OES @CAGeoSurvey
— USGS ShakeAlert (@USGS_ShakeAlert) December 4, 2025
Lyon County released this statement to 2 News Nevada:Â
"USGS confirmed that Lyon County residents received a false alert of a 5.9 earthquake at 8:06am near Dayton. We are awaiting additional information and will share when it is available. There is currently no hazard to the public. We are asking the public to not call 911."
BREAKING: The @USGS tells @KCBSRadio that it was an ERRANT REPORT triggered by automation that led to this morning’s false alert of a 5.9 magnitude earthquake in Dayton, NV. There was NO earthquake! USGS is investigating just how this happened.
— Steve Scott (@SteveScottNEWS) December 4, 2025
