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.

Physical Measurement Laboratory / Time and Frequency Division

Time Realization and Distribution Group

WWV and WWVH Broadcast Outages

Share

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

DateMJDBegan (UTC)Ended (UTC)Frequency
08-15-202360171214622312.5 MHz
07-20-202360146150016152.5, 5, 10, 15, 20, 25 MHz
08-24-202259815163616572.5, 5, 10, 15, 20, 25 MHz
07-15-202159410141514232.5 MHz
07-09-2021594040415

0641 

*carrier only until 1557 on 59405

5 MHz
03-15-2021592880001001515 MHz
05-20-202058989012202265 MHz
06-25-2019586591927230425 MHz
09-17-201858378083912372.5 MHz
12-26-2017581131530161515 MHz
08-30-201757995183519015 MHz
03-07-201757819232523472.5 MHz
02-23-201757807143916262.5, 5, 10, 15, 20, 25 MHz
02-22-201757806193621562.5, 5, 10, 15, 20, 25 MHz
02-21-201757805160818482.5, 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

05-22-201456799060213205 MHz
03-05-201456721040914215, 10 MHz
06-13-201256091214322502.5, 5, 10, 15, 20 MHz
09-04-201155808060707195 MHz
06-23-201155735041205105 MHz
12-10-201055540172617592.5, 5, 10, 15, 20 MHz
12-01-201055531160616572.5, 5, 10, 15, 20 MHz

01-01-2009

54832050406152.5, 5, 10, 15, 20 MHz
01-22-200854487173521002.5 MHz
09-18-200754361150215342.5, 5, 10, 15, 20 MHz
06-17-200754268----00562.5, 5, 10, 15, 20 MHz
06-16-2007522672154----2.5, 5, 10, 15, 20 MHz
05-07-200754227154421492.5, 5, 10, 15, 20 MHz
11-01-2004533100340044020 MHz
12-01-2003529742126213110 MHz
12-01-200352974212621315 MHz
09-22-2002525390640072520 MHz
11-19-200152232---160010 MHz
11-17-2001522302200---10 MHz
10-13-200152195183519105 MHz
11-03-2000518510700140020 MHz
09-24-2000518111010110510 MHz
06-26-2000517212315234020 MHz
01-18-2000515510000140020 MHz

 

WWVH Broadcast Outages

DateMJDBegan (UTC)Ended (UTC)Frequency
05-07-202460437052620302.5, 5, 10, 15 MHz
10-26-202360243001600222.5 MHz
04-19-202360053015902045 MHz
10-06-2022598582217225610 MHz
12-03-202159520222222302.5 MHz
07-27-202059057 14422.5 MHz
07-27-202059057 14405, 10, 15 MHz
07-26-2020590562009 2.5, 5, 10, 15 MHz
02-07-202058886214023515 MHz
01-05-2020588530450045810 MHz
12-31-201657753080509252.5, 5, 10, 15 MHz
11-27-20165772019350026 (11/28/2016)2.5 MHz
11-27-20165772019350028 (11/28/2016)5 MHz
11-27-20165772019350026 (11/28/2016)10 MHz
11-27-20165772019350026 (11/28/2016)15 MHz
11-27-201657719192619315 MHz
01-09-201657396142617095 MHz
12-11-201557367031805205 MHz
10-29-201557324185421272.5, 5, 10, 15 MHz
08-21-2008546991935200315 MHz
01-30-2007541300809090710 MHz
01-16-2007541162034204810 MHz
01-16-2007541160740170310 MHz
04-03-200653828030303085 MHz
02-07-200653773161217315 MHz
11-10-200553684153415405 MHz
01-15-200453019230023062.5 MHz
08-08-200352859131115422.5 MHz
Time and frequency
Created March 5, 2010, Updated July 18, 2024