On December 4, 2025, the USGS mistakenly issued a false alert for a 5.9-magnitude earthquake near Dayton, Nevada, triggering warnings as far as San Francisco. No shaking was reported, and the alert was quickly retracted. The cause remains unclear, with speculation about sensor noise or human-made interference. Meanwhile, a 3.3-magnitude quake was felt in northwest England and a 6.2-magnitude quake struck Alaska earlier this week.