Seismic tomography

By the end of the course you’ll know the basics of seismology and how to use the technical instruments and programs in practice. So it doesn't matter what level you’re on. Complex things are explained with simple and accessible language. Geophysists, mathematicians, geologists, geochemists, petrologists, engineers and everyone interested will find a lot of new information and get the access to the author's research methods and scientific algorithms that are used by seismologists all over the world.

The adventure begins!

The course consists of 10 modules (10 weeks).

 Weekly activities include:

·   watching videolectures;

·   answering ungraded quiz questions to make sure that the student understands the lecture material;

·   reading additional materials;

·   practicing with technical instruments and programs;

·   completing weekly graded quizzes which contribute to the final grade. 

Also, the students have to pass the final test at the end of the course to evaluate their overall knowledge of the course material.

Seismic imaging of the Earth Laboratory

https://bit.ly/37GkpGL 

LOTOS, code for non-linear local earthquake tomographic inversion

http://www.ivan-art.com/science/LOTOS/

Ivan Koulakov’s personal page: algorithms and publications

https://www.ivan-art.com/science/ 

Module 1. Tomography as a tool to look inside the Earth

• What is this course about?

• What can we see inside a little stone?

• Doing tomography with a hammer and explosions

• Earthquakes show us the Earth deep inside

Module 2. History of measuring earthquakes

• How did people learn to measure earthquakes?

• First attempts to look deep into the Earth

• Body waves. How do they propagate inside the Earth?

• Surface waves

Module 3. Look inside a volcano

• Land of Fire — Kamchatka

• Installing seismic stations on volcanoes. Almost a Hollywood adventure

• KISS of the Kamchatkan volcanoes

• Tomogram a few days before a volcano explosion (case of Bezymianny volcano in Kamchatka)

• Huge steam boiler within Gorely volcano

• Three independent views on the magma system of Avacha volcano

Module 4. Tomography: the must-know things

• Too many unknowns, too little information: is the problem unsolvable?

• Simplify – linearize – discretize

• Miraculous inversion: solving millions of equations on a simple PC

Module 5. Basic Tomo

• Start working with Basic Tomo

• BASIC TOMO. Recover the smiling face

• Playing tomography chess

Module 6. PROFIT code

• Ray tracing: shoot or bend?

• PROFIT code: basic principles

• PROFIT code: basic principle. Software + dataset

• PROFIT code: start working with data

• PROFIT code: process our experimental data

• Go to the field with a big hammer to make a real seismic experiment

Module 7. Doing tomography with natural sources

• Earthquakes: trouble for people, but precise tool for scientists to study the Earth. Mechanism - rock fracture

• How to localize earthquakes?

Module 8. LOTOS

• LOTOS: tool to explore 3D structures and localize earthquakes

• LOTOS: Basic principles

• LOTOS: look inside a supervolcano

• LOTOS: look at Stromboli

Module 9. Surface wave tomography

• Noise is another seismic source

• Surface wave tomography: two-step workflow

• Problem of testing: how far our images from the absolute truth?

Module 10. Conclusion 

The students who completed the course successfully, will acquire the following knowledge and skills:

• knowing the history of seismic tomography;

• understanding the basics of seismology;

• understanding the dynamics of earthquakes: how do they start and develop;

• using the instruments and software (BASIC TOMO, PROFIT code, LOTOS) in practice.

ПК-1. Способность использовать знания в области геологии, геофизики, геохимии, гидрогеологии и инженерной геологии, геологии и геохимии горючих ископаемых, экологической геологии для решения научноисследовательских задач (в соответствии с направленностью (профилем) подготовки).