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Broadcast Outages for WWVB

WWVB Home Most Recent Outages

   

NIST Radio Station WWVB concluded the test of a experimental advance notification system for daylight saving time (DST) on July 10, 2007. This testing began on June 21, 2007 and involved using bit 54 of the WWVB time code, which has previously been unused. The decision was made NOT to implement the new DST system because of possible adverse effects that it had on some existing radio controlled clocks.

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, 2007 when the signal was off or intermittent for more than 5 minutes.

Date MJD Began (UTC) Ended (UTC)
12-05-2007 54439 0336 0433
10-13-2007 54386 1928 2016
08-10-2007 54322 0600 0658
07-18-2007 54299 1658 2125
07-02-2007 54283 1654 1704
06-27-2007 54278 1550 1909
06-21-2007 54272 0326 0424
06-17-2007 54268 1048 1147
06-17-2007 54268 ---- 0055
06-16-2007 54267 2158 ----
06-07-2007 54258 0816 0925
05-07-2007 54227 1535 2220
04-26-2007 54216 2237 2258
03-27-2007 54186 1355 1407
03-06-2007 54165 2251 2302
02-16-2007 54147 1302 1357
01-25-2007 54125 1138 1257