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Before North Korea announced they had conducted the test, seismic activity had already been detected in North Korea by the USGS, near the site of previous nuclear tests at Mantapsan in Kilju County.
From the ancient histories of Herodotus to the modern writings of David Lance Goines, the notion that weather can somehow foreshadow coming seismic activity has been the topic of much discussion and debate.
An increase in seismic activity in an area has been used as a method of predicting earthquakes, most notably in the case of the 1975 Haicheng earthquake in China, where an evacuation was triggered by an increase in activity.
Due to the tombs' deteriorated condition, a result of seismic activity, exposure to the harsh tropical environment, and damage by tourists, Los Pinchudos was listed in the 2000 World Monuments Watch by the World Monuments Fund.