The Offices of Guam Homeland Security and Civil Defense (GHS/OCD), U.S. Naval Base Guam
(NBG), and Andersen Air Force Base (AAFB) will conduct routine testing of the vital communication
and advance warning system sirens, respectively, on Tuesday, December 5 starting at 3 p.m.
GHS/OCD will test the All Hazards Alert Warning System (AHAWS) from thirteen (13) locations in
conjunction with NBG and AAFB monthly routine testing of the “Giant Voice (GV).”
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:
Future tests of the AHAWS sirens will now be conducted on a monthly basis, in conjunction with NBG
and AAFB, and will typically fall on the first Tuesday of each month.
The following are a list of AHAWS siren sites to be tested:
1. GHS/OCD facility, Agana Heights
2. Agat Marina
3. JFK High School
4. Talofofo Elementary School
5. Asan Mayor’s Office
6. Pago Bay A-Frame South End
7. Yona Mayor’s Office
8. GWA Pump Station, Merizo
9. Ija Agricultural Station, Inarajan
10. Port Authority of Guam
11. Agat Senior Citizen’s Center
12. Hotel Nikko Guam
13. Tamuning Mayor’s Office
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

Skip to content