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

Pubblicato il 29 ott 2020

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“ChattingWith” Prof. Maurizio Fedi & Dott. Gianluca Gabbriellini – NUOVI TREND NELL’INTERPRETAZIONE DEI METODI DI POTENZIALE

I campi di potenziale sono metodi passivi, cioè si basano sulla misura dei campi naturali gravimetrico e magnetico della Terra. In gravimetria misuriamo con grande precisione la componente verticale del vettore dell’accelerazione gravitazionale. Nel caso del magnetismo, si possono misurare le tre componenti del vettore campo magnetico o, più comunemente, una singola componente chiamata campo totale, relativa alla direzione del campo principale che si origina nel nucleo esterno liquido della Terra….

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Premiazione Premio Mucciarelli 2020

In occasione della “Giornata internazionale delle donne e delle ragazze nella scienza” l’Istituto Nazionale di
Oceanografia e di Geofisica Sperimentale – OGS, l’Associazione Gian Franco Lupo, l’Università degli Studi
della Basilicata, il CNR–IMAA e l’ Associazione Nazionale Pubblica Assistenza – ANPAS organizzano l’incontro
online per la consegna dei premi alle tre vincitrici dell’edizione 2020.

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The past is the key to the future: what we have done and we are planning to do

I membri della University of Naples Federico II SEG Student Chapter, sono lieti di invitarvi al webinar “The past is the key to the future: what we have done and we are planning to do”.

Durante l’evento, il nuovo board della SEG Student Chapter illustrerà tutte le attività che sono state svolte nel biennio 2019/2020 ed i progetti relativi a questo nuovo anno. In particolare, una parte del webinar sarà dedicata alla presentazione dei risultati preliminari relativi alle indagini geofisiche condotte durante il corso “SEG Geophysics Field Camp in Southern Italy 2020”.

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More About This Event

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.