**INTERACT**:

**INT**eraction of

**E**lastic waves with unde

**R**ground

**A**coustic

**C**avi

**T**ies

This project focuses on understanding and modeling the propagation of elastic waves in media with internal boundaries, especially solid-gas, and potentially complex distributions of material parameters. The need for appropriate numerical methods for the approximation of this problem arises from needs in seismology, as the scientific problems underlying the verification of nuclear testing, which is the aim of the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) in Vienna. The primary goal of our project is to model the elastic wave propagation around an underground cavity as the one created by an underground nuclear explosion. For this coupled elastic-acoustic wave problem we plan to develop and analyze new and robust high-order discontinuous Galerkin finite element methods capable to comprehensively describe the entire wavefield, including reflected waves, interaction with surface waves, and cavity oscillations. The results of our research will facilitate the development of proper analysis techniques to detect the remnants of an underground nuclear test. The cavity detection problem is perhaps the single largest remaining scientific problem for the scientific operation of CTBTO. Our project will thus contribute substantially to bringing the future Comprehensive Nuclear-Test-Ban Treaty toward its diplomatic/political implementation.

PI: Ilaria Perugia, Faculty of Mathematics, University of ViennaCo-PI: Götz Bokelmann, Department of Meteorology and Geophysics, University of ViennaFunding agency: Mathematic and ... Call 2014, Wiener Wissenschafts-, Forschungs- und Technologiefond (WWTF)Number/Title: MA14-006, Elastic wave interaction with underground cavities Duration: 3 years (2015-2017) |

Project members

Ilaria Perugia, Faculty of Mathematics, University of Vienna Götz Bokelmann, Department of Meteorology and Geophysics, University of Vienna Sofi Esterhazy, Faculty of Mathematics, University of Vienna Felix Schneider, Department of Meteorology and Geophysics, University of Vienna |

Collaborations

Joachim Schöberl, Institute for Analysis and Scientific Computing, Vienna University of Technology |

News

25.04.2016 INTERACT team giving two oral presenations at the European Geosciences Union General Assembly 2016 held at the Vienna Austria Center from 18.-22.04.2016 23.11.2015 INTERACT team invited at the CTBTO Expert Meeting on Seismic Techniques 01.11.2015 Welcome to our webpage! |

**INTERACT project**

**Faculty of Mathematics**

University of Vienna

Oskar-Morgenstern-Platz 1

1090 Vienna

T: +43-1-4277-50793