WWVH

WWVH is a radio station on Kauai that broadcasts time signals and frequency standards across the Pacific region. The facility operates multiple transmitters on different frequencies to provide reliable timing information over vast distances.

The station began broadcasting in 1948 on Maui and relocated to Kauai in 1971, where it continues its time signal service today. The move improved coverage across the wider Pacific region.

The station is recognized by a female voice announcing the time, which sets it apart from its sister station in Colorado. This distinction has become a familiar feature for listeners across the Pacific region.

The facility sits in a remote coastal location and is not open to public visits, as it is a federal installation. Most interest focuses on how the time transmission works through radio signals received by portable clocks and devices.

The facility operates three cesium atomic clocks, with one continuously broadcasting while the other two serve as comparison and backup systems. This setup ensures the highest precision and reliability in time transmission.

Location: Hawaii

GPS coordinates: 21.98780,-159.76300

Latest update: December 7, 2025 19:24