US detects 4.2 magnitude tremor in North Korea

North Korea says it has conducted a nuclear test at an underground facility within the past several hours.

The US Geological Survey said on Monday it had detected a 4.2 magnitude tremor in North Korea at 7.05 am (IST), 385 km northeast of the capital, Pyongyang.

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The USGS Web site gave the exact location of the tremor as 41.311 degrees North latitude and 129.114 degrees East longitude at a depth of 0 km.

North Korea has said it conducted a nuclear test at an underground facility within the past several hours.