Amplitude Analysis and Modeling of Regional Phases in PNE Profiles in Northern Eurasia and Seismic Regionalization

摘要

Seismological observations play an important role in detecting and locating all nuclear events, determining their yields and distinguishing them from earthquakes and other chemical explosions. Regional phases play a critical role for small-yield nuclear test monitoring. Regional phases travel in the crust and the upper mantle, which are very heterogeneous, therefore, calibration of phase propagation characteristics within different tectonic and geologic environments is necessary to use regional phases for nuclear test monitoring. Over the past decades, Russian scientists acquired a network of dense, linear, long range, three-component Deep Seismic Sounding (DSS) profiles using conventional and Peaceful Nuclear Explosions (PNEs) over a large area of Northern Eurasia. Seven PNE profiles and 19 PNE shots were used in this study. From west to east, the seven profiles mainly traverse the East-European Craton; the Timan Belt, the Timan-Pechora Basin, the Ural Mountains, the West-Siberian Basin, the West-Siberian Rift.