GHS/OCD and NBG to Conduct Routine Testing of Advanced Warning Systems

GHS/OCD and NBG to Conduct Routine Testing of Advanced Warning Systems

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD) and U.S. Naval Base Guam (NBG) will conduct routine testing of the vital communication and advance warning system sirens, respectively, on Tuesday, December 3, starting at 3:15 p.m.

There are now nineteen (19) All Hazards Alert Warning Systems (AHAWS) installed on island. On November 5, GHS/OCD will test the AHAWS sirens in conjunction with NBG monthly routine testing of the “Giant Voice (GV)” sirens. 

Residents, visitors and motorists surrounding the AHAWS sirens and GV speakers can expect to hear pre-scripted voice messaging announcing the start and end of the test, and ten-seconds of the “Alert” tone, which can be heard here: Euro%20Tones%20Wav%20Files/Alert.wav.

Future tests of the AHAWS sirens will be conducted on a monthly basis, in conjunction with NBG and will typically fall on the first Tuesday of each month, unless it falls on an observed holiday.

The following are a list of AHAWS siren sites, to include the two recently installed trailer-mounted sirens:

  1. GHS/OCD facility, Agana Heights
  2. Agat Marina
  3. JFK High School (not to be tested on November 5)
  4. Talofofo Elementary School
  5. Asan Mayor's Office
  6. Pago Bay A-Frame South End
  7. Inarajan Elementary School
  8. Yona Mayor's Office
  9. Ft. Soledad, Umatac
  10. GWA Pump Station, Merizo
  11. Ija Agricultural Station, Inarajan
  12. Port Authority of Guam
  13. Agat Senior Citizen's Center
  14. Hotel Nikko Guam
  15. Tamuning Mayor’s Office
  16. George Washington High School
  17. Piti Village
  18. GWA site, Malojloj
  19. Ricardo J. Bordallo Governor’s Complex, Adelup

For more information, contact GHS/OCD Public Information Officer, Jenna G. Blas at (671) 478-0208 or via email at or NBG Public Affairs Officer, Theresa Merto Cepeda at (671) 339-2663 or via email at



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