主题：【文摘】朝鲜宣布已进行地下核试验 -- chela

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American officials say government spy satellites monitor about a half-dozen suspicious sites in North Korea but have also focused on the military base.

The much-scrutinized base would be an ideal spot for North Korea to set off an underground nuclear blast if it wanted to make a splash. A senior American intelligence official, who spoke on the condition of anonymity because of federal secrecy rules, noted that the mountainous redoubt “is a place they know we’re looking at.”

Along with lots of civilians. Google Earth, on the Web at earth.google.com, features some of the best public snooping on the isolated base, its software combining close-up images and altitude data so the surrounding mountains rise up in three dimensions. A viewer can zoom overhead like a spy plane. The images come from DigitalGlobe, a satellite company in Longmont, Colo.

Google views of the tunneling area, near 41.279 degrees north latitude and 129.087 east longitude, show a set of industrial buildings and what appears to be a mine entrance.