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This page is no longer being updated and the information may be out of date.

2011 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, 2011 when the signal was off or intermittent for more than 5 minutes.

DateMJDBegan (UTC)Ended (UTC)
11/02/201155867 0053
11/01/2011558662341 
11/01/20115586622202238
10/30/20115586417581917
10-25-20115585914011457
08-25-20115579806320727
07-23-20115576520402133
07-10-20115575220542144
06-07-20115571709031008
05-18-20115569915091521
04-25-20115567617351742
04-17-20115566815301622
03-17-20115560911141222
03-11-20115563113301409
03-08-20115562805100602
02-13-20115560515531656
02-11-20115560314061414
Time and frequency

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Created January 18, 2012, Updated September 29, 2025
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