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This page is no longer being updated and the information may be out of date.

2013 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 when the signal was off or intermittent for more than 5 minutes.

DateMJDBegan (UTC)Ended (UTC)
11-17-20135661319112007
11-17-20135661314501550
11-01-20135659704040453
10-30-20135659507520917
09-12-20135654702060333
09-02-20135653712311354
08-29-20135653310501220
08-21-20135652502250350
08-18-20135652219262035
08-03-20135650721162248
07-22-20135649511111227
07-20-20135649320432137
06-30-20135647307350838
06-29-20135647201520345
06-28-20135647108130928
06-16-20135645920352153
06-16-20135645900350129
05-29-20135643802020305
05-25-20135643701550904
04-06-20135638812151315
03-16-20135635709061012
Time and frequency
Created February 17, 2016, Updated September 29, 2025
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