(CNN)- - North Korea announced it carried out an underground nuclear test, eliciting immediate response from country leaders worldwide.

World leaders at times at odds with the United States, became allies against the North Korean nuclear test.

President Bush says, "The United States condemns this provocative act.">

While the president called it a threat to international peace and security, the North Korean ambassador beamed.

Pak Gil Yon says, "I'm very much proud of our scientists and researchers who have conducted such a very, very successful nuclear underground test."

The underground blast sent shockwaves measuring between 3.6 and 4.2 on seismographs. That was met by a wave of outrage from world powers.

It only took thirty minutes for all fifteen members of the Security Council to condemn the test.

US Ambassador to the UN John Bolton says, "And that's remarkable in the Security Council, as some of you may know, to have a unanimous condemnation of the North Korean test no one defended it no one came close to defending it."

South Lorea's president said his country will work with the United States to take care of the threat through diplomacy.

South Korean students are hopeful. One says, "I can't say my friends at school are in panic but they definitely seem nervous from this incident."

Some fear a nuclear armed North Korea would dramatically alter the balance of power in the Asia-Pacific region. It is a balance few believe the US will ever allow to tip in favor of North Korea.