The Republic of?Korea's President Park Geun-hye (C) presides over the National Security Council at the Presidential Blue House in Seoul, in this handout picture provided by the Presidential Blue House and released by Yonhap on January 6, 2016. [Photo/Agencies]

SEOUL -?The Republic of?Korea's President Park Geun-hye on Wednesday urged different responses from the international society to the Democratic People's Republic of Korea's fourth nuclear test.

Park told the nationally televised speech to the people that the nuclear test was a significant provocation and an intolerable challenge, saying that resuming propaganda broadcasts in frontline areas is the most effective tool of psychological warfare to the provocation.

Her speech came a week after the DPRK claimed last Wednesday that it had successfully tested its first hydrogen bomb.

Two days later, the ROK restarted blaring propaganda messages from loudspeakers across the border into the DPRK in retaliation for the nuclear test.

The president said that Seoul is closely discussing with Washington about countermeasures effectively restricting the DPRK's nuclear test, stressing that the country will bring the strongest anti-DPRK sanctions, which will cause a change in the DPRK's behavior.