报告嘉宾：Christoph Sens-Schönfelder，senior scientist at the German Research Centre for Geosciences

      报告时间：2024 年1月12日（周五）下午16:30

      报告地点：523 784 7557（线上）

报告简介

Analysis of seismic waves at volcanoes faces two challenges that make the interpretation of seismograms different from other seismological targets. First, the propagation medium is more complex than typical crustal material. Alternating layers of competent lava flows and soft ash layers or dykes cutting through highly fractured sills create a heterogeneous structure that scatters seismic waves far more efficiently that average crust. Second, the presence of fluids in the magmatic plumbing system allows for a multitude of source mechanism that produce signals which are usually more complicated and variable than shear fractures. In consequence we face complicated signals that propagate through a medium which makes them even more complex.

I will provide examples that illustrate the complexity of volcano seismology and discuss strategies to exploit this complexity. I will draw on scattering theory and seismic interferometry to show how highly scattering media can be imaged and why the strong scattering provides ideal conditions for monitoring tiny variation of the propagation material that inform about internal processes and environmental forces acting on the volcanic edifice.

主办单位：        

成都理工大学地球物理学院

地球勘探与信息技术教育部重点实验室

协办单位：                      

石油圈

深圳面元智能科技有限公司

北京赛斯默微科技有限公司

成都市科学传播学会

      2024年1月12日