A Civil Defense siren in Puako. Hawaii 24/7 file photo

The Civil Defense sirens are tested monthly at 11:45 a.m. on the first work day of the month. The monthly test is a one minute sounding. It is a good idea to listen to a local radio stations (listed below) during the monthly test to ensure you can receive the Emergency Alert Messages which are broadcast in conjunction with the monthly siren test. The siren system is managed by State Civil Defense. The counties provide assistance with maintenance and operation of the sirens.

Big Island radio stations that carry EAS messages and Civil Defense messages
KPUA (Hilo) 620 AM
KKON (Kona) 790 AM
KHLO (Hilo) 850 AM
KHBC (Hilo) 1060 AM 92.7 FM
KMWB (Kona) 93.1 FM
KLUA (Kona) 93.9 FM
KWXX (Hilo) 94.7 FM
KPVS (Hilo) 95.9 FM
KNWB (Hilo) 97.1 FM
KKBG (Hilo) 97.9 FM
KAGB (Kona) 99.1 FM
KAPA (Hilo) 100.3 FM
KAOY (Kona) 101.5 FM
KBGX (Hilo and Kona) 105.3 FM
KLEO (Kona) 106.1 FM
KWYI (Waimea) 106.9 FM
KKOA (Hilo and Kona) 107.7 FM