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Physical Measurement Laboratory / Time and Frequency Division

Time Realization and Distribution Group

This page is no longer being updated and the information may be out of date.

2010 WWVB Broadcast Outages

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During normal operation, the 60 kHz signal from WWVB is transmitted 24 hours per day, 7 days a week. The table includes periods since January 1, 2010 when the signal was off or intermittent for more than 5 minutes.

DateMJDBegan (UTC)Ended (UTC)
12-13-20105554317311739
12-10-20105554017261759
10-31-20105550003100540
10-31-20105550001360256
08-17-20105542507000803
08-13-20105542103270414
07-07-20105538418551918
06-07-20105535421472154
06-01-20105534808260951
05-08-20105532423102358
01-24-20105522015521652
01-24-20105522013251425
Time and frequency
Created March 11, 2011, Updated September 29, 2025
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