A Detailed Mapping & Tomographic Study of Uppermost Mantle Pn Velocities in Western N. America & Other Continental Regions & Thickness of the Continental Lithosphe

本研究的目的是绘制世界上岩石圈-板块辐合的几个主要地区大陆下高原的Pn和Sn地震速度。该方法将使用广泛的22。年ISC数据库，并应用层析成像技术来确认和进一步描绘地震速度的横向变化。这项工作是目前正在进行的科罗拉多高原下类似的Pn速度详细测绘的延伸。这些结果将作为板块汇聚区构造动力学模型的约束。板块会聚区域的高水平地震活动使本研究成为该地区地震发生模型的重要贡献者，因此，本工作对国家地震减灾计划做出了贡献。

This research is to map Pn and Sn seismic velocities undercontinental plateaus in a number of major regions of lithosphericplate convergence in the world. The method will use theextensive 22.year ISC database and apply tomographic techniquesto confirm and further delineate lateral variations of seismicvelocity. This work is an extension of similar detailed mappingof Pn velocities beneath the Colorado plateau now underway. These results will serve as constraints to dynamic models of thetectonics of plate convergence regions. The high level ofearthquake activity in plate convergent regions makes thisresearch an important contributor to models of earthquakeoccurrence there and, thus, this work is a contributor to theNational Earthquake Hazard Reduction Program.