These seven figures present the theoretical Network Sensitivity Solution (NSS) for a theoretical Ms5 explosion in North Korea recorded with different station distributions. Panel a) plots the station distribution on a regional map. Panel b) plots the function used to calculate the theoretical amplitude (displacement) with distance, and noise level used to to calculate the signal-to-noise ratio. The amplitude function is from Russell (2006) and the noise model is the New High-noise Model (NHNM) from Peterson (1993). Panel c) is the variance-reduction (VR) distribution on a source-type plot (Hudson et al., 1989), where the best-fit solution is plotted with its VR value. For details, please see the text. The synthetic waveforms used in this analysis are created using Green's functions calculated with FKRPROG (Saikia, 1994) for the 1-D velocity model, MDJ2 (Nguyen, 1994).
Figure S1. Theoretical M5 explosion recorded by KSAR (http://www.ctbto.org/verification-regime/featured-stations/types/primary-seismic/ps31-wonju-republic-of-korea/page-1-ps31/).
Figure S2. Theoretical M5 explosion recorded by regional IMS primary stations (http://www.ctbto.org/map/#ims).
Figure S3. Theoretical M5 explosion recorded by regional IMS primary and auxiliary stations (http://www.ctbto.org/map/#ims).
Figure S4. Theoretical M5 explosion recorded by stations in Figure S3, and regional stations reporting to IRIS (http://www.iris.edu/dms/mda.htm).
Figure S5. Theoretical M5 explosion recorded by stations in Figure S4, and regional stations of the China National Network (CB - http://www.iris.edu/mda/CB/).
Figure S6. Theoretical M5 explosion recorded by stations in Figure S5, and the Dongbei Broadband Network (Chun, 2009).
Figure S7. Theoretical M5 explosion recorded by three stations in the Dongbei Broadband Network (Chun, 2009).
Chun, K.-Y., Y. Wu, and G. A. Henderson (2009). Lg Attenuation near the North Korean Border with China, Part I: Model Development from Regional Earthquake Sources, Bull. Seis. Soc. Amer. 99 3021-3029, doi:10.1785/0120080316.
Russell, D. R. (2006). Development of a time-domain, variable-period surface-wave magnitude measurement procedure for application at regional and teleseismic distances, part I: Theory, Bull. Seis. Soc. Amer. 96 665-677, doi:10.1785/0120050055
Peterson, J. (1993). Observations and modeling of background seismic noise. Open-file report 93-322, U. S. Geological Survey, Albuquerque, New Mexico.
Hudson, J. A., R. G. Pearce, and R. M. Rogers (1989). Source type plot for inversion of the moment tensor, J. Geophys. Res. 94 765-774.
Saikia, C. K. (1994). Modified frequency-wavenumber algorithm for regional seismograms using Filon's quadrature: modeling of Lg waves in eastern North America, Geophys. J. Int. 118 142-158, doi: 10.1111/j.1365-246X.1994.tb04680.x.
Nguyen, B. V. (1994). Surface-Wave Study of the 22 January 1992 Western Yellow Sea Earthquake, Eos Trans. AGU Spring/Fall Meet. Suppl., Abstract S51D-12.
