両江道
The suspected explosion occurred near Wŏltan Workers' District ("Wŏltal-lodongjagu") (41°19'47"N 127°05'02"E) in the county of Kimhyŏngjik in Ryanggang Province, a mountainous region, about above sea level. The explosion was about from the border with China. The area contains several military installations, including the Yeongjeo-dong ballistic missile base.