International Trainings Course Seismology and Seismic Hazard - Moment Tensor Inversion

Lecturers

• Simone Cesca cesca@gfz-potsdam.de
• Pinar Büyükakpinar pinar@gfz-potsdam.de
• Gesa Petersen gesap@gfz-potsdam.de
• Daniela Kuehn daniela@norsar.no
• Sebastian Heimann sebastian.heimann@uni-potsdam.de

Chat

Please join the itc2023 channel on the Pyrocko Hive.

Program

Thursday, June 29

• 08:30 - 10:00: Moment Tensor Inversion - Theory
• 10:30 - 12:00: Earthquake Data, Agencies and Formats
• 13:30 - 15:00: Data Access, Preparation and Visualization
• 15:30 - 17:00: Green’s Functions

Friday, June 30

• 08:30 - 10:00: Synthetic Seismograms
• 10:30 - 12:00: Moment Tensor Inversion with Grond
• 13:30 - 15:00: Moment Tensor Inversion Exercise I
• 15:30 - 17:00: Moment Tensor Inversion Exercise II

Software

Some special software is needed to perform our exercises.

Option 1: Use our preconfigured virtual machine

Download the following VM image and import it into VirtualBox.

• itc2023.ova - VM image with all software pre-installed (3.5 GB)

Choose Import Appliance from the File menu and select the downloaded VM image. Then start the VM. The password is earthquake101 but it is configured that you don't have to enter it.

In the guest system, open a terminal and type

itc-update

to get the exercise dataset and software hot-fixes.

Option 2: Use your own computer

Install the following software on your Linux or Mac machine (Windows may also work but is not recommended):

• Pyrocko
• Grond
• QSEIS Backend for Fomosto

Presentations

• Source inversion in seismology
• The World of Seismological Data
• Pyrocko Squirrel
• Pyrocko Snuffler
• Pyrocko GF
• Grond - The practical side

Links

• Pyrocko web page
• Pyrocko manual
• Grond manual
• Snuffler manual
• Squirrel command line tool tutorial
• Pyrocko GF overview

Do your own inversion:

• find an event (M 5-6) in the Geofon catalog

• find your crust2 velocity model:

from pyrocko import crust2x2 

print(crust2x2.get_profile(lat=event_latitude, lon=event_longitude))

• grond init example_regional_cmt my_first_grond_project

• cd my_first_grond_project

• mkdir gf_stores

• cd gf_stores

• download gf_store: fomosto download crust2_j3

• cd ..

• gedit bin/grondown --> change Line 1 pyrocko-python to python3

• run grondown: bin/grondown_regional.sh eventname