Residents of Chinese counties bordering North Korea felt the tremors of a 4.9-magnitude earthquake caused by the detonation of what Pyongyang claims was a hydrogen bomb.
Students sitting an exam at a high school in Yanji county, Jilin (吉林) province, had to be evacuated as the tremors ripped cracks through their playground, state-run China Central Television reported.
Residents reported seeing desks and chairs shake for several seconds and some companies evacuated their offices.
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“I was still in bed, I had to put on my clothes and rush out,” one resident of nearby Changbai county told the Phoenix TV-affiliated ifeng.com, admitting he had felt “scared”.
A store-owner said he had noticed the door of his shop shaking violently and had first thought this was due to strong wind.
But not everyone was so affected by the tremor.
Two Yanji residents contacted by the South China Morning Post said they had not felt any tremors.