The influence of different data types on the moment tensor estimated for the 2017 DPRK nuclear event. Each eigenvalue lune (Fig. 2c) shows the waveform misfit for a different combination of data. The best-fitting solution for each map is depicted by a green circle. The four data sets considered are BW = body waves, SW = surface waves, RP = regional first-motion polarities and TP = teleseismic first-motion polarities. The five misfit maps display combinations of these data sets, ranging from body waves only (left) to all four combined (right). In each map, the misfit is normalized by the corresponding data norm used in the inversion. Equal weights are assigned to each data group to ensure balanced contributions in the joint inversions. For example, when all four data groups are used, the corresponding misfit weights are [0.25, 0.25, 0.25, 0.25]. Below each misfit map is plotted the corresponding confidence curve over the solution space volume V, as described in Tape & Tape (2016). Waveform fits for each case can be found in Supplementary Figs S14 to S25, with a subset for the joint inversion [BW,SW,RP,TP] displayed in Fig. 9.