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Broadcast Outages for WWVB
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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 all periods during the year 2001 when the signal was turned off or intermittent for more than 5 minutes.
| Date | MJD | Began (UTC) | Ended (UTC) |
| 12-08-2001 | 52251 | 1822 | 1933 |
| 11-22-2001 | 52235 | 1450 | 1920 |
| 11-08-2001 | 52221 | 1310 | 1359 |
| 11-02-2001 | 52215 | 1500 | 2359 |
| 10-13-2001 | 52195 | 1835 | 1910 |
| 09-04-2001 | 52125 | 0931 | 0958 |
| 09-01-2001 | 52122 | 0746 | 0845 |
| 08-04-2001 | 52125 | 0036 | 0146 |
| 07-22-2001 | 52112 | 0705 | 0738 |
| 07-15-2001 | 52105 | 1000 | 1028 |
| 07-12-2001 | 52102 | 2350 | 0018 |
| 06-22-2001 | 52082 | 0319 | 0424 |
| 06-13-2001 | 52074 | 0438 | 0458 |
| 06-12-2001 | 52073 | 0630 | 0652 |
| 06-12-2001 | 52073 | 0309 | 0356 |
| 06-11-2001 | 52072 | 0502 | 0530 |
| 05-27-2001 | 52056 | 2021 | 2110 |
| 05-20-2001 | 52049 | 2228 | 2237 |
| 05-20-2001 | 52049 | 2108 | 2157 |
| 05-19-2001 | 52048 | 1750 | 2157 |
| 05-17-2001 | 52046 | 0221 | 0248 |
| 05-17-2001 | 52046 | 1108 | 1207 |
| 05-15-2001 | 52044 | 0555 | 0620 |
| 05-15-2001 | 52044 | 0015 | 0040 |
| 05-04-2001 | 52033 | 0845 | 0912 |
| 04-30-2001 | 52029 | 1848 | 1908 |
| 04-30-2001 | 52029 | 1523 | 1641 |
| 04-30-2001 | 52029 | 0052 | 0125 |
| 04-27-2001 | 52026 | 0805 | 0830 |
| 04-23-2001 | 52022 | 2037 | 2058 |
| 04-23-2001 | 52022 | 1917 | 1936 |
| 04-14-2001 | 52013 | 0230 | 0250 |
| 04-12-2001 | 52011 | 1105 | 1210 |
| 04-12-2001 | 52011 | 0515 | 0545 |
| 04-11-2001 | 52010 | 1155 | 1210 |
| 04-11-2001 | 52010 | 1035 | 1105 |
| 04-07-2001 | 52006 | 0202 | 1253 |
| 04-02-2001 | 52001 | 1320 | 1333 |
| 03-02-2001 | 51970 | 1632 | 1748 |
| 02-05-2001 | 51945 | 2116 | 2126 |
| 01-11-2001 | 51920 | 1500 | 1900 |
| 01-02-2001 | 51910 | 2345 | 0012 |