15th Munich Earth Skience School

www.berghotel-sudelfeld.de

23 – 28 February, 2025

ObsPy goes Downtown: Seismology in Cities

Seismologists used to stay away from noisy environments like cats avoid water. With the emergence of noise interferometry, novel instrumentation strategies like 6C sensor setups, or distributed acoustic sensing (DAS), cities have become an interesting target: There are several reasons: interferometry offers a unique opportunity to monitor near surface changes of elastic properties in connection with ground water or other mass movements. Geothermal exploration in the cities needs to be monitored and the closer one looks the more control there is on induced seismicity. Furthermore, the interaction of seismic wavefields with buildings, and the effect of buildings as sources of vibrations is not fully understood. In this winterschool we want to train the spectrum of methodologies that can be applied to understand structural changes in the subsurface and structures (buildings) with particular applications to city environments. Topics include seismic interferometry (MSNoise), 6C (rotation and translation) methods for subsurface imaging (twistpy.org), distributed acoustic sensing data analysis (dascore.org), seismic inversion applied to noise-derived waveform. As always we will train these methodologies with the help of Jupyter notebooks.Training material will be provided and will remain accessible through github.

Lecturers/Speakers:

Thomas Lecocq (ROB Brussels) – interferometry, MSNoise

Joachim Wassermann (LMU Munich) – ObsPy, induced seismicity

Felix Bernauer (LMU Munich) – Building vibrations, 6 C data analysis

Yara Rossi (LMU Munich/Univ. Oregon) – Structural health monitoring, data fusion

Sabrina Keil (LMU Munich) – 6 C data inversion

Eleonore Stutzmann (IPG Paris) – DAS data applications

Daniel Bowden (ETH Zurich) – DAS data processing and interferometry

Anjali Dhabu (Univ. Hamburg) – Seismic monitoring of infrastructures

Fabian Bonilla (University Gustave Eiffel, Paris) – nonlinear near surface effects

Richard Allen (Univ. Berkeley) – The “myshake” Project

Organization and contact: Heiner Igel (LMU Munich) and Thomas Lecocq (ROB Brussels).

Schedule, software, and data:

Software, anaconda environment, data, and slides can be accessed here.

	Morning 8:30-11	11-15	Afternoon 15-18	Evening
Sun		S K I I N G S N O W B O A R D I N G	Arrival of participants Icebreaker 18:00 in Restaurant Ground Floor
Mon	Welcome,  Introduction to the Workshop “City Seismology” IgelNews on  ObsPy  Wassermann The myshake Project  AllenNodes in the City Van Noten		Know your Noise (MSNoise) LecocqSite effects, resonance, HVSR Van Noten	Experiment in the Hotel or vicinity (building vibrations)
Tue	6C for cities, Data processing with TwistPy KeilDistributed acoustic sensing for investigating the subsurface – Applications Stutzmann		Distributed acoustic sensing – Fundamentals, data processing, interferometry Bowden	Evening Special: Seismic signature of skiing Brass
Wed	Nonlinear near surface effects BonillaScience talks from participants		Free afternoon, parallel slalom, ski hut	Bogner Ski Film Night (“Fire and Ice”)
Thu	Structural Health Monitoring – time domain – 6C and DAS Bernauer		Structural Health Monitoring – frequency domain Rossi, Dhabu	Mulled Wine outside, Special Dinner
Fri	Science talks from participants		Participants leave