Detecting the natural earthquake from the explosion, apart from its scientific effects in detecting similar signals of a different physical source, is also important in political issues related to the testing of nuclear explosions. When a nuclear explosion occurs, hundreds of stations record it. The explosion seismogram, has specific characteristics that are different from the tectonic earthquake. The waveform, the focal mechanism, the depth, magnitude and amount of released energy and other characteristics of the earthquake and explosion are different. By knowing these features, explosions and earthquakes can be distinguished from each other. North Korea's September 3, 2017 earthquake, using the waveform inversion method Checked out and Detected that the earthquake was not natural, But also due to underground nuclear testing in this country.