Comparison of seismic waveforms of the six most recent DPRK nuclear tests at station MDJ (Mudanjiang, China). The seismograms have been filtered to replicate the response of a WWSSN-SP seismograph and aligned to a common origin. Visible are Pn, Pg, Sg, and Lg phases.
The waveforms have been downloaded from IRIS DMC archive (<a rel="nofollow" class="external free" href="https://ds.iris.edu/ds/nodes/dmc/">https://ds.iris.edu/ds/nodes/dmc/</a>).
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<span class="int-own-work" lang="en">Own work</span>