3D First-Arrival Regional Calibration Model of Northern Eurasia

• DOI: 10.1785/0120030173
• Publication Date: 2005-07-07T22:49:24Z
• Authors: I. B. Morozov
• Keywords: Arrival time

Seismological monitoring of the Comprehensive Test Ban Treaty (CTBT) requires detailed knowledge travel-time characteristics seismic phases across large areas. We use first-arrival travel times from several Russian Deep Seismic Sounding (dss) profiles, primarily those Peaceful Nuclear Explosions (pnes), to construct a 3D regional model northern Eurasia. The method used, which can be viewed as generalization existing regionalization techniques, is based on apparent-velocity-based spatial interpolation picked dss records. resulting field described in terms an apparent velocity space geographic coordinates and ray parameter. In calibration, this could used approximate source-specific station correction surfaces for any location within region also region-specific reference background further calibration effort. This approach allows incremental refinement additional data become available. By converting into depth, obtained, providing description general features upper mantle