New 4.6 tremor detected in N.Korea due to ‘cave in’: China


BEIJING, Sept 3, (APP/AFP) – A second earth tremor possibly
caused by a “cave-in” has been detected near North Korea’s underground nuclear test site, the China Earthquake Network Centre said Sunday, minutes after a major tremor indicated an atomic test.
The new 4.6 magnitude tremor at a depth of zero kilometers could be
due to a “collapse (cave in)”, Chinese authorities said without giving further details.
The first — of 6.3 magnitude according to the US Geological Survey
— could be the North’s sixth nuclear test, Seoul’s military said, adding that it was detected near the North’s Punggye-ri test site.
Japan said it had confirmed such a test.
USGS said the tremor was located 24 kilometers northeast of
Sungjibaegam, in North Hamgyeong province. “It’s an explosion rather than an earthquake,” Jana Pursley, a USGS geophysicist, told AFP.
China said it also had detected a seismic shock of 6.3 magnitude
caused by a “presumed explosion”.
The second tremor was at the same location, according to latitude and
longitude coordinates provided by the centre.
The apparent test came just hours after Pyongyang claimed to have
developed a hydrogen bomb that could be loaded into the country’s new intercontinental ballistic missile.