Sessions on Solid Earth Dynamics

Reference PASC Community

PND01 PASC Solid Earth Dynamics Network Discussion

Wednesday, June 3, 2015
14:30 - 19:00, HG E22

14:30 - 15:00 Status Report and Discussion PASC Network Solid Earth;
Andreas Fichtner (ETH Zurich, Switzerland)
15:00 - 19:00 Tutorial on Distributed Optimization for Full Waveform Inversion in Julia;
Eldad Haber (University of British Columbia, Canada); Lars Ruthotto (Emory University, USA)
19:00 End Session

Tutorial on Distributed Optimization for Full Waveform Inversion in Julia

This four hours hands-on tutorial provides a brief introduction into FWI and the main cornerstones of inversion codes.

Title Distributed Optimization for Full Waveform Inversion in Julia
Abstract Full waveform inversion (FWI) is commonly used in geophysical explorations. The goal of FWI is to estimate a model  (velocity) of the subsurface from measurements of the ground?s responses to seismic vibrations. FWI is known to be a challenging inverse problem that contains many local minima and can be ill-posed.  FWI is computationally demanding;  estimating a model that accurately predicts the measurements requires a large number of simulations each of which is obtained from solving the Helmholtz equation over many sources and frequencies.  We will show how to design an inversion code that can work well for small to medium size problems and can be scaled up to large scale problems. Special emphasis will be put on Julia's potential to distribute the PDE solves amongst all available workers.
14:30 - 15:00 Introduction to FWI (Eldad Haber)
15:30 - 16:15 Numerical Optimization in Julia (Lars Ruthotto)
16:15 - 17:15 Computer Lab 1: Serial FWI
17:15 - 17:45 Parallel Computing in Julia (Lars Ruthotto)
17:45 - onwards Computer Lab 2: Distributed FWI


MS03 Data Assimilation and Predictive Models in the Earth Sciences (Abstract)

Organiser: Christian Boehm (ETH Zurich, Switzerland)
Co-organiser: Andreas Fichtner (ETH Zurich, Switzerland); Dave A. May (ETH Zurich, Switzerland)
Field(s): Solid Earth


Monday, June 1, 2015


13:00 - 13:30 Preconditioning Strategies for Multi-parameter Full Waveform Inversion, Ludovic Métivier (CNRS, France) Abstract
13:30 - 14:00 Data Assimilation for Source Encoding Strategies in Full-Waveform Seismic Inversion, Christian Boehm (ETH Zurich, Switzerland) Abstract
14:00 - 14:30 Full Waveform Inversion for the Identifiable Subspace, Drosos Kourounis (Università della Svizzera italiana, Switzerland) Abstract
14:30 - 15:00 A Data-Comprehensive Seismic Earth Model across the Scales, Michael Afanasiev (ETH Zurich, Switzerland) Abstract
15:30 - 16:00 Data Assimilation in Geodynamical Modelling: Methods and Applications, Alik Ismail-Zadeh (Karlsruhe Institute of Technology, Germany) Abstract
16:00 - 16:30 Towards Joint Reconstruction of Paleo Mantle-Lithosphere Dynamics Using Data Assimilation, Nicolas Coltice (Université Lyon 1, France) Abstract
16:30 - 17:00 Data Assimilation and Predictive Models in Geomagnetism, Alexandre Fournier (Institut de Physique du Globe de Paris, France) Abstract
17:00 - 17:30 On Ensemble and Particle Filters for Large-Scale Data Assimilation, Roland Potthast (Deutscher Wetterdienst, Germany) Abstract

MS07 Modeling and Simulation in Geo-Energy and Hydro-Power (Abstract)

Organiser: Rolf Krause (Università della Svizzera italiana, Switzerland)
Co-organiser: Thomas Driesner (ETH Zurich, Switzerland)
Field(s): Computer Science & Mathematics, Engineering, Solid Earth


Monday, June 1, 2015

HG E22

13:00 - 13:30 Modeling of Inelastic Strain Induced by CO2 Injection, Victor Vilarrasa (EPFL, Switzerland) Abstract
13:30 - 14:00 CFD Computations of a Cavitation Vortex Rope, Jean Decaix (HES-SO//Valais-Wallis, Switzerland) Abstract
14:00 - 14:30 Challenges of Simulating Geothermal Reservoir Processes, Julian Mindel (ETH Zurich, Switzerland) Abstract
14:30 - 15:00 A New Volcanic Hydrothermal System in Java; the Lusi Mud Eruption and Aftermath, Stephen Miller (University of Neuchatel, Switzerland) Abstract
15:30 - 16:00 Modeling 3D THM Processes in Geothermics with Continuum Mechanics, Gunnar Jansen (University of Neuchatel, Switzerland) Abstract
16:00 - 16:30 Prediction of Elastostatic Friction for Rock-Like Surfaces with FEM, Alessandro Rigazzi (Università della Svizzera italiana, Switzerland) Abstract
16:30 - 17:00 Modeling Induced Seismic Hazard During Geothermal Reservoir Creation, Joseph Doetsch (ETH Zurich, Switzerland) Abstract
17:00 - 17:30 Silt Erosion Simulation Using Finite Volume Particle Method, Ebrahim Jahanbakhsh (EPFL, Switzerland) Abstract

Poster Session

Posters in Solid Earth Dynamics

Monday, June 1, 2015

17:30 - 20:00

EAR-01 Advection of Material Interfaces via a Two-Way Particle Level Set Approach, Henri Samuel (CNRS, France) Abstract
EAR-02 Aggressive Local Smoothing on Accelerators for Stokes Flow, Patrick Sanan (Università della Svizzera italiana, Switzerland) Abstract
EAR-03 Discontinuous Galerkin Methods for Variable Viscosity Stokes, Dominic Etienne Charrier (ETH Zurich, Switzerland) Abstract
EAR-04 Forward and Adjoint Spectral-Element Simulations of Seismic Wave Propagation using Hardware Accelerators, Daniel Peter (Università della Svizzera italiana & ETH Zurich, Switzerland) Abstract
EAR-05 From Capillary to Bubbly Flow: the Fate of Low Reynolds Number, Buoyancy Driven Fluids Transport at Strong Porosity Transition, Andrea Parmigiani (ETH Zurich, Switzerland) Abstract
EAR-06 Large-Scale Geo-Electromagnetic Modeling with Adaptive High-Order FEM, Alexander Grayver (ETH Zurich, Switzerland) Abstract
EAR-07 Towards a Data-Comprehensive Earth Model Across the Scales, Michael Afanasiev (ETH Zurich, Switzerland) Abstract
EAR-08 Use of High Performance and Massively Parallel GPU Computing to Resolve Nonlinear Waves in Poromechanics, Ludovic Räss (University of Lausanne, Switzerland) Abstract