Source Contributions at Far-Regional Distances

摘要: Abstract : In order to quantify the effects of different components explosion source function on far regional seismograms (900-2000km) a one- dimensional velocity model is developed for seismic waves traveling across Basin and Range. This constrained by broadband data recorded at Lajitas station. Complete synthetic are utilizing extended reflectivity technique. Pg, Pn, mantle P, Lg surface included in as well synthetics. The P follows closely that Olsen et al. (1980,1) from shorter offset data. lack Sn observational requires thin S lid not these earlier models. complete set synthetics replicate transition crustal energy around 900km, rapid decay Pg beyond 1000km, energy, lower frequency content relative body wave arrivals. propagation used an spall function. much less sensitive depth burial differences than source. Spall parameters near indicate importance phase time dependent. If peak falls outside low window Lg, then it has negligible contribution waveforms.