Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

WWV and WWVH Broadcast Outages

The tables below show the date and times when NIST Radio Stations WWV and WWVH were off the air. During normal operation the signals are available 24 hours per day, 7 days a week. The tables list all outages since January 1, 2000 that lasted for more than 5 minutes.

WWV Broadcast Outages

Date MJD Began (UTC) Ended (UTC) Frequency
08-15-2023 60171 2146 2231 2.5 MHz
07-20-2023 60146 1500 1615 2.5, 5, 10, 15, 20, 25 MHz
08-24-2022 59815 1636 1657 2.5, 5, 10, 15, 20, 25 MHz
07-15-2021 59410 1415 1423 2.5 MHz
07-09-2021 59404 0415

0641 

*carrier only until 1557 on 59405

5 MHz
03-15-2021 59288 0001 0015 15 MHz
05-20-2020 58989 0122 0226 5 MHz
06-25-2019 58659 1927 2304 25 MHz
09-17-2018 58378 0839 1237 2.5 MHz
12-26-2017 58113 1530 1615 15 MHz
08-30-2017 57995 1835 1901 5 MHz
03-07-2017 57819 2325 2347 2.5 MHz
02-23-2017 57807 1439 1626 2.5, 5, 10, 15, 20, 25 MHz
02-22-2017 57806 1936 2156 2.5, 5, 10, 15, 20, 25 MHz
02-21-2017 57805 1608 1848 2.5, 5, 10, 15, 20, 25 MHz

09-15-2014

56915

1645

1654

15 MHz

09-15-2014

56915

1556

1602

5 MHz

08-26-2014

56895

0047

0141

2.5 MHz

05-22-2014

56799

0602

1320

5 MHz

03-05-2014

56721

0409

1421

5, 10 MHz

06-13-2012

56091

2143

2250

2.5, 5, 10, 15, 20 MHz

09-04-2011 55808 0607 0719 5 MHz
06-23-2011 55735 0412 0510 5 MHz
12-10-2010 55540 1726 1759 2.5, 5, 10, 15, 20 MHz
12-01-2010 55531 1606 1657 2.5, 5, 10, 15, 20 MHz

01-01-2009

54832 0504 0615 2.5, 5, 10, 15, 20 MHz
01-22-2008 54487 1735 2100 2.5 MHz
09-18-2007 54361 1502 1534 2.5, 5, 10, 15, 20 MHz
06-17-2007 54268 ---- 0056 2.5, 5, 10, 15, 20 MHz
06-16-2007 52267 2154 ---- 2.5, 5, 10, 15, 20 MHz
05-07-2007 54227 1544 2149 2.5, 5, 10, 15, 20 MHz
11-01-2004 53310 0340 0440 20 MHz
12-01-2003 52974 2126 2131 10 MHz
12-01-2003 52974 2126 2131 5 MHz
09-22-2002 52539 0640 0725 20 MHz
11-19-2001 52232 --- 1600 10 MHz
11-17-2001 52230 2200 --- 10 MHz
10-13-2001 52195 1835 1910 5 MHz
11-03-2000 51851 0700 1400 20 MHz
09-24-2000 51811 1010 1105 10 MHz
06-26-2000 51721 2315 2340 20 MHz
01-18-2000 51551 0000 1400 20 MHz

 

WWVH Broadcast Outages

Date MJD Began (UTC) Ended (UTC) Frequency
04-19-2023 60053 0159 0204 5 MHz
10-06-2022 59858 2217 2256 10 MHz
12-03-2021 59520 2222 2230 2.5 MHz
07-27-2020 59057   1442 2.5 MHz
07-27-2020 59057   1440 5, 10, 15 MHz
07-26-2020 59056 2009   2.5, 5, 10, 15 MHz
02-07-2020 58886 2140 2351 5 MHz
01-05-2020 58853 0450 0458 10 MHz
12-31-2016 57753 0805 0925 2.5, 5, 10, 15 MHz
11-27-2016 57720 1935 0026 (11/28/2016) 2.5 MHz
11-27-2016 57720 1935 0028 (11/28/2016) 5 MHz
11-27-2016 57720 1935 0026 (11/28/2016) 10 MHz
11-27-2016 57720 1935 0026 (11/28/2016) 15 MHz
11-27-2016 57719 1926 1931 5 MHz
01-09-2016 57396 1426 1709 5 MHz
12-11-2015 57367 0318 0520 5 MHz
10-29-2015 57324 1854 2127 2.5, 5, 10, 15 MHz
08-21-2008 54699 1935 2003 15 MHz
01-30-2007 54130 0809 0907 10 MHz
01-16-2007 54116 2034 2048 10 MHz
01-16-2007 54116 0740 1703 10 MHz
04-03-2006 53828 0303 0308 5 MHz
02-07-2006 53773 1612 1731 5 MHz
11-10-2005 53684 1534 1540 5 MHz
01-15-2004 53019 2300 2306 2.5 MHz
08-08-2003 52859 1311 1542 2.5 MHz
Created March 5, 2010, Updated August 18, 2023