ChattingWith: Intervista a A. Vesnaver & E. Denich (INOGS, Trieste).

Pubblicato il 29 ott 2020

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Associazione per la Geofisica Licio Cernobori

L’Associazione per la Geofisica Licio Cernobori, visto il successo del workshop organizzato l’anno scorso per festeggiare il ventennale, ha deciso di ripetere l’iniziativa nei giorni 22 e 23 giugno 2022. Inoltre ha deciso di dedicare il workshop di quest’anno alla memoria di Lorenzo Petronio, valente ed entusiasta geofisico, Dirigente Tecnologo dell’OGS, ma soprattutto grande amico di Licio Cernobori e di tutti noi, e membro del consiglio direttivo dell’AGLC, che è prematuramente ed improvvisamente scomparso il 6 aprile di quest’anno.

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La prossima assemblea dei soci della Sezione Italiana EAGE SEG si terrà a Trieste in occasione del 40° GNGTS. L’evento si svolgerà il prossimo 29 giugno presso il palazzo dei congressi “Stazione Marittima” di trieste, in aula Saturnia alle ore 15.00.

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Challenge Bowl 2022

Challenge Bowl Italia 2022
Nel corso del prossimo 40° Convegno Nazionale GNGTS a Trieste, il giorno 29 Giugno, si terrà la quattordicesima Edizione del Challenge Bowl Italia, ovvero la Grande Sfida a Quiz tra studenti di Geofisica Applicata.
La gara si svolge in inglese, ed è aperta a studenti di laurea e dottorato di ricerca. I partecipanti si iscrivono in squadre di due persone, idealmente una più esperta in geofisica ed una in geologia, vista l’interdisciplinarietà delle domande.

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What are the main applications of Seismic Inversion in your research centre?

A.V. – In our team, two research trends have been living together for 10/20 years:

  • Seismic tomography;
  • Seismic modeling (the major international expert is Mr. “Jose Carcione”).

Considering these two branches of geophysics, which we have been working for about a year and a half to build our own approach to full waveform inversion. We do not want to replicate what already exists but look for new ways to reduce computational cost.

In particular, we have been thinking since the beginning to develop a parallel code. We have proposed some projects to keep multi-year funding of the ERC (European research council) and other public or private investors.

In your opinion, what are the future goals of Seismic inversion?

E.D. – In my opinion, researchers have recently been developing parallel algorithms of FWI, using tools such as High-Performance-Computing to implement Machine Learning techniques to analyze Big data (i.e. genetic algorithms).

A.V. – in the future, we will not have to limit ourselves to estimating only the P speeds but we will have to work more on the elastic front and extend the analysis also to the inelastic field. We could also get good results on the anisotropy front, but for the moment, I remain a bit skeptical. With a view to reducing calculation times, as Eleonora said, I believe that artificial intelligence is a very promising new frontier.

As an old physicist, I love this technique very much. I hope that the use of artificial intelligence is a way to improve the physical / analytical knowledge of the problem, constituting a more robust approach to represent the nature that surrounds us.

 You both mentioned parallel computing, artificial intelligence, machine learning; what has been the impact of these technologies on today’s geophysics?

E.D. – nowadays the massive use of artificial intelligence has almost become a fashion. As Aldo said, techniques such as Neural Networks should not be used immediately. First, it is necessary to try to simplify the problem from an analytical point of view, defining sensible optimization functions. Already from the beginning, you can do a lot without immediately resorting to super calculators.

A.V. – I absolutely agree. I would like to add a historical note … I remember that in the 90s, expert systems were very fashionable, it seemed that these would be the future of Geophysics. In reality, after 10 years of talking about it, the revolution has not been seen, now there has been 20 years in which no one has spoken about it anymore.