A widespread earthquake alert warning people to 'drop, cover, hold on' was mistakenly sent to residents in Nevada and California, causing confusion and concern. The alert, which claimed a 5.9-magnitude quake had struck near Dayton, Nevada, was quickly found to be false, with no reports of shaking or damage from local law enforcement. Seismologists believe this may be the first time the automated alert system has issued a completely false message, possibly triggered by human-made noise such as explosions, construction, or large vehicles. Experts are now investigating the cause to prevent similar incidents in the future.