Petros Bogiatzis
(Petros Mpogiatzis)

Research Associate

Harvard Seismology Group
Department of Earth and Planetary Sciences
Harvard University


My main research focus is seismic tomography for imaging both the elastic and anelastic properties of the earth in various scales; from meters in environmental, hydrogeological, geotechnical and archaeological problems, up to thousands of kilometers in the study of upper mantle and crust of subduction zones. My current work is on Japan's crust and upper mantle.

My research embraces different aspects of the tomographic problem. For example, it includes the development of algorithms to automate the extraction of useful information from seismic waveforms such as the arrival times of various seismic phases, S-wave splitting parameters and body wave dispersion data.

Furthermore, I am particularly interested in inverse problems. More specifically, I am working on the development of the necessary machinery, in terms of theory, methodology and software that will allow the assessment and the quantification of the uncertainty of large tomographic problems. My interest in inverse problems includes the study of joint inversion schemes that will allow the incorporation of complementary information from dissimilar datasets. Another focus of my research is the seismic forward problem. I am currently working on the development of forward modeling algorithms that exploit high performance computing facilities.

I am also interested in the study of the very low end of the seismic frequency spectrum, where the free oscillations of the Earth are observed. Such data provide significant insight into Earth’s internal structure but also into the properties of massive earthquakes.

Recently, I have been involved in an effort to digitize old analog seismograms of Harvard’s station. My main contribution is the development of DigitSeis software that converts scanned images of typical analog seismograms into readable digital time series.

Some of my other interests include exploring non-conventional inversion approaches based upon global optimization methods such as genetic algorithms, and studying wave propagation and seismic radiation of earthquakes in the very shallow part of subduction zones that is considered to be aseismic.


2013-2014, Research Associate, Harvard University
2011-2013, Postdoctoral Fellow, Harvard University

2010 Ph.D. (Geophysics), Aristotle University of Thessaloniki, Greece
2006 M.Sc. (Geophysics), Aristotle University of Thessaloniki, Greece
2003 B.Sc. (Geology), Aristotle University of Thessaloniki, Greece

  • Bogiatzis, P., & Ishii, M., 2015. Continuous wavelet decomposition algorithms for automatic detection of compressional- and shear-wave arrival times, Bulletin of the Seismological Society of America, v. 105 (3), doi:10.1785/0120140267.
  • Bogiatzis, P., & Ishii M., 2014. Constraints on the Moment Tensor of the 2011 Tohoku‐Oki Earthquake from Earth’s Free Oscillations. Bulletin of the Seismological Society of America, v. 104, p. 875-884, doi: 10.1785/0120130243.
  • Tsokas, G. N., Tsourlos, P. I., Kim, J-H., Papazachos, C. B., Vargemezis, G., & Bogiatzis P., 2014. Assessing the Condition of the Rock Mass over the Tunnel of Eupalinus in Samos (Greece) using both Conventional Geophysical Methods and Surface to Tunnel Electrical Resistivity Tomography, Archaeological Prospection v. 21 (4), p. 277-291, doi: 10.1002/arp.1489.
  • Soupios, P., Akca, I., Mpogiatzis, P., Basokur, A.T., & Papazachos, C., 2011. Applications of hybrid genetic algorithms in seismic tomography. Journal of Applied Geophysics, v. 75, p. 479-489, doi: 10.1016/j.jappgeo.2011.08.005.
  • Bogiatzis, P, 2010. Contribution to joint tomography of different types of seismic data, Ph.D. Thesis, Aristotle University of Thessaloniki, Thessaloniki, Greece, pp. 228, doi:10.12681/eadd/22059.
  • Bogiatzis, P. Ν., 2006. 2-D inversion of seismic tomography data. M.Sc. Thesis, Aristotle University of Thessaloniki, Thessaloniki, Greece, pp 71.

  • Bogiatzis, P., & Ishii, M., 2015. DigitSeis: A new digitization software for converting analog seismograms (submitted at Bulletin of the Seismological Society of America BSSA-D-15-00085, under revision).
  • Bogiatzis, P., Ishii, M., & Davis, T.A., 2015, Toward using direct methods in seismic tomography: Computation of the full resolution matrix using high performance computing and sparse QR factorization (submitted in Geoph. J. Int.).
  • personal site: (currently under reconstruction...)

    Department of Earth and Planetary Sciences / Harvard University / 20 Oxford Street / Cambridge / MA 02138 / U.S.A. / Telephone: +1 617 495 2350 / Fax: +1 617 496 1907 / Email: