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CIG-LLNL Computational Seismology Workshop


Table of Contents

  1. Overview
  2. Introduction
  3. Part I: Setting up SPECFEM3D_GLOBE
  4. Part II: Continental-scale Simulations
  5. Part III: Visualization
  6. Part IV: Adjoint Simulations (Bonus)
  7. Further Work
  8. Resources

Part I: Setting up SPECFEM3D_GLOBE

In the first part of the tutorial, we will go through the three steps that are needed to set up SPECFEM3D_GLOBE:

First, change directory to your directory on the parallel file system (e.g. /p/lscratchh/vaaland1/, which is where we will be working in this tutorial.

      cd /p/lscratchh/USERNAME/

Obtain the Source Code

For this workshop we will get the source code by cloning this GitHub repository:

      git clone --depth=1

In general, the current, stable release of SPECFEM3D_GLOBE can be downloaded at the CIG website, while the development code is available on GitHub:

File Structure

Now that we have downloaded the source code, we will take a look at what’s inside. The repository includes a whole range of files that serve different purposes, but the key files and folders that are relevant to this tutorial are highlighted in the following tree-structure:

      +-- DATA/
      |   +-- STATIONS
      |   +-- STATIONS_ADJOINT
      |   +-- CMTSOLUTION
      |   +-- Par_file
      +-- OUTPUT_FILES/
      +-- DATABASES_MPI/
      +-- SEM/
      +-- sumbit_mesher
      +-- submit_solver



In order to generate the Makefile, we need to configure SPECFEM3D_GLOBE. We will configure it using Intel compilers. Refer to the manual for configuration with other compilers.

      module load intel/16.0.4
      mpicc --version
      # icc_orig (ICC) 16.0.4 20160811
      # Copyright (C) 1985-2016 Intel Corporation.  All rights reserved.

      mpif90 --version
      # ifort_orig (IFORT) 16.0.4 20160811
      # Copyright (C) 1985-2016 Intel Corporation.  All rights reserved.
      ./configure CC=icc CXX=icpc FC=ifort MPIFC=mpif90


Once we have configured SPECFEM3D_GLOBE, we can compile the source code by typing make all in the root directory. This will produce all the binary files that we will use in the remaining parts of this tutorial. The resulting binary files can be found in the bin/ folder.

NOTE: The solver executable xspecfem3D uses static allocations which will depend upon the parameters set in the Par_file. This means that if you change any parameter in the Par_file after compiling SPECFEM3D_GLOBE, you should recompile the code. Recompile the code by running make clean and make all in the root folder.

In this section we have looked at how to set up, configure, and compile SPECFEM3D_GLOBE.

In the next section we move on to Part II of the tutorial, and look at how to prepare the input data for the continental-scale simulation.

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