• Reuters


North Korea is unlikely to be ready to stage a nuclear test timed to coincide with U.S. President Barack Obama’s visit to Asia, a respected think tank said on Wednesday, based on its assessment of satellite imagery.

Comments by South Korea’s Foreign Ministry on Tuesday that the North could be moving toward what would be its fourth nuclear test prompted the U.S. State Department to urge Pyongyang to “refrain from actions that threaten regional peace.”

Recent commercial satellite imagery indicates North Korea has begun new operations at Punggye-ri, said 38 North, a North Korea monitoring website run by Johns Hopkins University’s School of Advanced International Studies in Washington.

North Korea continually works on improving testing at its Punggye-ri site. But 38 North said there was little evidence to suggest a test would take place during Obama’s visit to Seoul. This “may be possible but appears unlikely,” it said.

Increased activity had been seen in a six-week period from early March to Saturday, including in an area where there were two completed tunnels, 38 North said.

“In particular, there appears to be movement of crates, boxes and materials near the entrances, possibly into the tunnels,” it said. However, it added: “Recent operations at Punggye-ri have not reached the high level of intensity — in terms of vehicle, personnel and equipment movement — that occurred in the weeks prior to past detonations.

“Moreover, other possible indicators present before the North Korean nuclear tests in 2009 and 2013, such as communications vans and a satellite dish intended to transmit pretest data, have not been spotted.”

The activity “could represent an early stage of preparations for a test or may be intended for a less provocative purpose, such as conducting maintenance after a long winter” 38 North concluded.

Work at the site is seasonal and often picks up in the Korean spring. Some earlier satellite images had suggested the North was digging multiple tunnels, which could possibly indicate that it was planning more than one nuclear detonation. 38 North acknowledges that the commercial satellite imagery it uses may present an incomplete picture of the highly secretive state.

The United States said Tuesday it was watching the Korean Peninsula closely after reports that Pyongyang may be planning another nuclear test and urged it not to take any step that would threaten regional peace.

The South Koran reports come just before Obama is due in Japan and later South Korea, where he will discuss ways to deal with North Korea’s nuclear weapons program. Obama is due in Tokyo on Wednesday and in Seoul on Friday.

“We have certainly seen the press reports . . . regarding possible increased activity in North Korea’s nuclear test site,” State Department spokeswoman Jen Psaki said. “We are closely monitoring the situation on the Korean Peninsula.

“We continue to urge North Korea to refrain from actions that threaten regional peace and security and to comply with its international obligations and commitments,” she told a regular news briefing.

South Korea’s Yonhap news agency quoted South Korean Defense Ministry spokesman Kim Min-seok as saying that “a lot of activity” was being seen at the Punggye-ri test site.

“So our forces are keeping in mind the possibility that North Korea may suddenly conduct a nuclear test in a short period of time, or, as in previous cases, deceive us with what appears to be a nuclear test.”

North Korea warned last month it would not rule out a “new form” of nuclear test after the United Nations Security Council condemned Pyongyang for launching ballistic missiles into the sea.

On the Air Force One flight carrying Obama to Asia, White House spokesman Jay Carney was asked about the reports that North Korea may be preparing a nuclear test.

“North Korea has a history of taking provocative actions and we are always mindful of the possibility that such an action could be taken,” he told reporters. “There is a kind of cyclical nature to the provocative actions that North Korea tends to take and we’ll be watching it very closely.”

When asked what Pyongyang meant by a “new form” of nuclear test, North Korea’s deputy ambassador to the United Nations said on April 4 that the world would have to “wait and see.”

Nuclear expert Jeffrey Lewis, of the Monterey Institute of International Studies in the United States, said this month that the reference to a new form of test could mean simultaneous detonation of two or more devices as part of a program of more intense nuclear testing expected over the next few years.

Diplomats have said it is possible the U.N. Security Council will respond to last month’s North Korean missile tests by expanding a sanctions blacklist to include more North Korean entities involved in Pyongyang’s missile program. But they said it could take weeks to reach agreement. The council expanded its sanctions on North Korea after its third nuclear test in February 2013.

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