2 days ago · How a power outage in Colorado caused U.S. official time to be 4.8 microseconds off By Joe Hernandez Published December 21, 2025 at 6:11 PM CST J. Sherman, R. Jacobson

1 day ago · Colorado Windstorm Causes 4.8 Microsecond Glitch in Official US Time A destructive windstorm disrupted the power supply to more than a dozen atomic clocks that keep official …

1 day ago · A powerful storm in Boulder, Colorado, caused a power outage that knocked the U.S. official atomic clock out of sync, delaying time by 4.8 microseconds.

America's official clock briefly lagged this week, thanks to a windstorm in Colorado and a backup system that didn't kick in as planned. The nation's time is maintained at the National Institute ...

19 hours ago · US official time slowed down by a few microseconds last week due to power outage, watchdog says Atomic clocks went out of sync after a severe windstorm knocked out …

1 day ago · A power outage in Boulder, Colorado, caused by preventive measures against wildfires, disrupted NIST's atomic clocks, resulting in a 4.8-microsecond drift in official U.S. …

All of the atomic clocks continued ticking through the power outage last week thanks to their battery backup systems, according to NIST supervisory research physicist Jeff Sherman. What …