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Dr. Céline Hadziioannou

Professor in Seismology, University of Hamburg

Coordinator of Innovative Training Network "SPIN",
funded by the the European Union's Horizon 2020 programme

Former Emmy Noether Fellow, project title:
"The origin of Love waves in the ocean generated noise wave field"

University of Hamburg
Institute of Geophysics
Bundesstrasse 55
20146 Hamburg -- Germany

email: celine.hadziioannou [at] uni-hamburg.de
Tel. +49 (0)40 42838 2980

Google Scholar
ORCID.ORG/0000-0002-5312-2226

CV

Beside the seismic waves caused by earthquakes, any seismometer anywhere on Earth continuously measures faint vibrations. This heartbeat of the Earth is the signature of ocean waves interacting with the seafloor, generating seismic waves in the process.

From their frequency signature, we know that the strongest sources of seismic noise (with around 7 -- 15 second periods) are generated by ocean waves. However, the precise way in which these ocean waves interact with the solid Earth is not yet understood. For the (vertically polarized) Rayleigh waves, a widely accepted and tested theoretical model exists. However, in particular for the (horizontally polarized) Love waves, which we observe in non-negligible quantities, no such physical explanation exists.

The core of my current research is to understand the origin and behavior of seismic noise sources, and in particular those that generate Love waves. What is the generation mechanism causing the noise? Where are the strongest source regions and how do they change over the seasons? With my group, I address these questions using both observations and numerical simulations.

Variations in the seismic noise also provides us with information about the source phenomena that generate it. Since most of these source phenomena are inherently linked with ocean wave state and the atmospheric excitation thereof, careful examination of seismic noise can contribute climate and weather studies.

The analysis of this ambient seismic noise brings us tools with which we can use to improve our understanding of transient processes in the Earth crust, and produce detailed images of its structure. This forms a second focus of my research. How can we extract information from complex seismic wavefields? What can it tell us about changes in subsurface properties? How do these changes relate to material damage, and when are they precursors to failure? These questions can be adressed across the scales, on different earth systems and beyond. Methods based on ambient seismic noise and coda wave interferometry can be used to monitor seismic fault zones, volcanoes, glaciers and even buildings.

Rotational Seismology Event Database

Online access to more than 17,000 Earthquake waveforms and processed plots from signals recorded simultaneously by the Wettzell ring laser and a nearby seismometer.

Seismo-Live

Contribution of teaching notebooks, e.g. "Signal Processing", "Ambient Seismic Noise", "Rotational Seismology"

Students under my supervision are indicated with a red star ^★
Postdocs with a black star ^★

• S. Schippkus^★ , M. Safarkhani^★ , C. Hadziioannou,
  Continuous isolated noise sources induce repeating waves in the coda of ambient noise correlations,
  Submitted to Seismica
• C. Bruland^★, C. Hadziioannou,
  Gliding tremors associated with the 26 second microseism in the Gulf of Guinea,
  Nature Communications Earth & Environment 4, 176 (2023)
  https://www.nature.com/articles/s43247-023-00837-y
• J. Pelaez Quiñones^★, D. Becker^★, C. Hadziioannou,
  Beamforming of Rayleigh and Love waves in the course of Atlantic cyclones,
  J. Geophys. Res. Solid Earth, 128 (2) e2022JB025050 (2023)
  https://doi.org/10.1029/2022JB025050
  preprint here
• S. Schippkus^★, R. Snieder, C. Hadziioannou,
  Seismic interferometry in the presence of an isolated noise source,
  Seismica (community-driven diamond open-access journal), 1(1)
  https://doi.org/10.26443/seismica.v1i1.195
  preprint here
• C-M Liao, K. Hicke, F. Bernauer, H. Igel, C. Hadziioannou, E. Niederleithinger,
  Multi-Sensor measurements on a large-scale bridge model,
  conference abstract at 5. Brückenkolloquium 2022 (2022)
• S. Schippkus^★, C. Hadziioannou,
  Matched Field Processing for complex Earth structure,
  Geophys. J. Int. Vol. 231.2, (2022)
  https://doi.org/10.1093/gji/ggac240
  preprint here
• D. Essing^★, V. Schlindwein, Mechita C. Schmidt-Aursch, C. Hadziioannou, S. C.Stähler,
  Characteristics of current-induced harmonic tremor signals in ocean bottom seismometer records,
  Seismol. Res. Lett., 92(5), 3100-3112, (2021)
  http://doi.org/10.1785/0220200397
• R. Steinmann^★, E. Larose, C. Hadziioannou
  Effect of centimetric freezing of the near subsurface on Rayleigh and Love wave velocity in ambient seismic noise correlations
  Geophys. J. Int. 224(1), 626-636 (2021)
  https://doi.org/10.1093/gji/ggaa406 [pdf]
• H. Igel, U. K. Schreiber, A. Gebauer, F. Bernauer, S. Egdorf, A. Simonelli, C-J. Lin, J. Wassermann, S. Donner, C. Hadziioannou, S. Yuan, A. Brotzer, J. Kodet, T. Tanimoto, U. Hugentobler, J-P. Wells,
  ROMY: a multi-component ring laser for geodesy and geophysics,
  Geophys. J. Int, 225(1) (2021)
  https://doi.org/10.1093/gji/ggaa614 [pdf] [bibtex]
  earthArxiv preprint: https://doi.org/10.31223/X53G6F
• D. Becker^★, L. Cristiano, J. Peikert, T. Kruse, F. Dethof^★, C. Hadziioannou, T. Meier,
  Temporal modulation of the local microseism in the North Sea,
  J. Geophys. Res. Solid Earth, 125(10), e2020JB019770 (2020)
  https://doi.org/10.1029/2020JB019770
• C. Hadziioannou, J. Salvermoser^★, R. Steinmann^★, L. Marten^★, E. Niederleithinger
  Structural health monitoring meets ambient noise seismology,
  Sollicited extended abstract for EAGE ``1st Conference on Geophysics for Infrastructure Planning Monitoring and BIM, 2019'' (peer reviewed) (2019)
• M. van Driel, S. Ceylan, J. F. Clinton, D. Giardini, R. Weber, P. Lognonn&eaigu;, B. Banerdt, M. Drilleau, N. Murdoch, M. Panning, R. Garcia, D. Mimoun, M. Golombek, J. Tromp, M. Böse, I. Daubar, B. Kenda, A. Khan, L. Perrin, A. Spiga, M. S. Boxberg, M. Parath, M. Ditz, A. Lamert, T. Möller, S. Zhang, D. Ambrois, J. Chèze, F. Peix, H. Alemany, D. Mercerat, J. Balestra, A. Deschamp, C. Twardzik, L. Rolland, S. Mader^★, L. Marten^★, C. Schröer^★, D. Becker, T. Casademont^★, F. Dethof^★, D. Essing^★, K. Grunert^★, C. Hadziioannou, I. Hochfeld^★, T. Kilchling^★, F. Mehrkens^★, P. Neumann^★, R. Neurath^★, R. Steinmann^★, N. Trumpik^★, P. Werdenbach-Jarklowski^★, H. Hu, J. Li, Y. Zheng, E. Stutzmann, M. Schimmel, C. Hammer, B. Knapmeyer-Endrun, S. C. Stähler, N. Brinkman, S. Kedar, F. Euchner, B. Fernando, M. Tsekhmistrenko, K. Hosseini, C. Haindl, H. Godwin, A. Szenicer, T. Garth, and A. Allam
  Preparing for InSight: Evaluation of the Blind Test for Martian Seismicity,
  Seismol. Res. Lett. (2019)
  https://doi.org/10.1785/0220180379
• S. Stähler, M. Panning, C. Hadziioannou, R.D. Lorenz, S. Vance, K. Klingbeil, S. Kedar
  Seismic signal from waves on Titan's seas,
  Earth and Planetary Science Letters 520, 250-259, (2019)
  https://doi.org/10.1016/j.epsl.2019.05.043 [arXiv:1905.11251]
• B. Chow^★, J. Wassermann, B. Schuberth, C. Hadziioannou, S. Donner and H. Igel
  Love wave amplitude decay from rotational ground motions, Geophys. J. Int. 218(2) 1336-1347 (2019)
  https://doi.org/10.1093/gji/ggz213
• L. Gualtieri, E. Stutzmann, C. Juretzek^★, C. Hadziioannou and F. Ardhuin
  Global scale analysis and modeling of primary microseisms, Geophys. J. Int. 2018 (2) 560-572 (2019)
  doi: 10.1093/gji/ggz161 [pdf]
• D. Ziane^★ and C. Hadziioannou
  Multiple scattering as a possible mechanism for generating Love waves in the secondary microseism, Geophys. J. Int. 217 (2) (2019)
  doi: 10.1093/gji/ggz056 [pdf]
• L. Krischer, S. Donner, M. van Driel , C. Hadziioannou, M. Koymans, J. Leeman, F. Lindner, T. Megies, C. Nunn, A. Rijal, J. Salvermoser^★, T. Taufiqurrahman, S. Wollherr, D. Vargas, J. Wassermann, F. Wölfl, C. Tape and H. Igel,
  Seismo-Live: An Educational Online Library of Jupyter Notebooks For Seismology, Seismol. Res. Lett., (2018)
  doi: 10.1785/0220180167 [pdf]
• S. Hable, K. Sigloch, G. Barruol, S. C. Stähler, C. Hadziioannou,
  Clock errors in land and ocean bottom seismograms: High-accuracy estimation using multiple component noise cross-correlations, Geophys. J. Int., 214 (3), (2018)
  doi: 10.1093/gji/ggy236 [pdf]
• F. Lindner , C. Weemstra , F. Walter, C. Hadziioannou,
  Towards Monitoring the englacial fracture state using virtual-reflector seismology, Geophys. J. Int., 214 (2) (2018)
  doi: 10.1093/gji/ggy156 [pdf]
• C. Juretzek^★, C. Hadziioannou,
  Linking source region and ocean wave parameters with the observed primary microseismic noise, Geophys. J. Int. 211 (3), 1640-1654, (2017)
  doi: 10.1093/gji/ggx388 [pdf]
• S. Donner, C.-J. Lin, C. Hadziioannou, A. Gebauer, F. Vernon, D. C. Agnew, H. Igel, U. Schreiber, J. Wassermann,
  Comparing direct observation of strain, rotation, and translation with array estimates at Pinon Flat Observatory, California, Seismol. Res. Lett., 88 (4), (2017)
  doi: 10.1785/0220160216 [pdf]
• J. Salvermoser^★, C. Hadziioannou, S. Hable^★, L. Krischer, B. Chow, C. Ramos, J. Wassermann, U. Schreiber, A. Gebauer, H. Igel,
  An event database for rotational seismology, Seismol. Res. Lett. 88, Mar. (2017)
  doi: 10.1785/0220160184 [pdf] Link to Database
  
• T. Tanimoto, C.-J. Lin, C. Hadziioannou, H. Igel, and F. Vernon,
  Estimate of Rayleigh-to-Love wave ratio in the secondary microseism by a small array at Piñon Flat observatory, California, Geophys. Res. Lett., 43, (2016)
  doi:10.1002/2016GL071133 [pdf]
• C. Juretzek^★, C. Hadziioannou,
  Where do ocean microseisms come from? A study of Love-to-Rayleigh wave ratios, J. Geophys. Res. Solid Earth 121, 6741-6756 (2016)
  doi:10.1002/2016JB013017 [pdf]
• A. Obermann, T. Planès, C. Hadziioannou, M. Campillo,
  Lapse-time dependent coda wave depth sensitivity to local velocity perturbations in 3-D heterogeneous elastic media, Geophys. J. Int. 207(1), 59-66 (2016)
  doi:10.1093/gji/ggw264 [pdf]
• C. Wu, A. Delorey, F. Brenguier, C. Hadziioannou, E. Daub, P. Johnson,
  Constraining depth range of S-wave velocity decrease after large earthquakes near Parkfield, California, Geophys. Res. Lett. 43, 6129-6136 (2016)
  doi:10.1002/2016GL069145 [pdf]
• T. Tanimoto, C. Hadziioannou, H. Igel, J. Wassermann, U. Schreiber, A. Gebauer, B. Chow,
  Seasonal variations in the Rayleigh-to-Love wave ratio in the secondary microseism from co-located ring laser and seismograph, J. Geophys. Res. Solid Earth, 121, (2016)
  doi:10.1002/2016JB012885 [pdf]
• J. Wassermann, A. Wietek^★, C. Hadziioannou, H. Igel,
  Towards a Single Station Approach for Microzonation: Using Vertical Rotation Rate to Estimate Love-Wave Dispersion Curves and Direction Finding, BSSA, May (2016)
  doi:10.1785/0120150250 [pdf]
• J. Salvermoser^★, C. Hadziioannou, S. Stähler,
  Structural monitoring of a highway bridge using passive noise recordings from street traffic - J. of the Acoust. Soc. Am. 138, 3864, (2015)
  doi:10.1121/1.4937765 [pdf]
• T. Tanimoto, C. Hadziioannou, H. Igel, J. Wasserman, U. Schreiber, A. Gebauer,
  Estimate of Rayleigh-to-Love wave ratio in the secondary microseism by co-located ring laser and seismograph - Geophys. Res. Lett., 42 (2015)
  doi: 10.1002/2015GL063637 [pdf]
• C. Hadziioannou, P. Gaebler, U. Schreiber, J. Wassermann, H. Igel,
  Examining ambient noise using co-located measurements of rotational and translational motion - Journal of Seismology: Special issue on rotational motions 16(4), 787-796 (2012)
  doi: 10.1007/s10950-012-9288-5 [pdf]
• C. Hadziioannou, E. Larose, A. Baig, P. Roux, M. Campillo,
  Improving Temporal resolution in ambient noise monitoring of seismic wave speed - J. Geophys. Res. 116, B07304 (2011)
  doi: 10.1029/2011JB008200 [pdf]
• R. Weaver, C. Hadziioannou, E. Larose, M. Campillo,
  On the precision of noise correlation interferometry - Geophys. J. Int. 185(3), 1384 - 1392 (2011);
  doi: 10.1111/j.1365-246X.2011.05015.x [pdf] [bibtex] [arxiv]
• C. Hadziioannou, E. Larose, O. Coutant, P. Roux, M. Campillo
  Stability of monitoring weak changes in multiply scattering media with ambient noise correlation: Laboratory experiments - J. Acoust. Soc. Am. 125(6), 3688-95 (2009)
  doi: 10.1121/1.3125345 [appendix] [bibtex] [pdf]
• F. Brenguier, M. Campillo, C. Hadziioannou, N. M. Shapiro, R. M. Nadeau, E. Larose,
  Postseismic relaxation along the San Andreas Fault at Parkfield from continuous seismological observations, Science 321, 1478 (2008)
  doi: 10.1126/science.1160943 [bibtex] [pdf]

Contributor to Seismo-Live

Ambient Noise Seismology
(MSc block course, 2021 - present)

Earthquakes
(BSc/MSc, 2021 - present)

Body & Surface wave seismology
(MSc, 2017 - present)

Seismologie
(BSc, 6th Semester, 2017 - present)

Seismology Seminar
(MSc, 2017 - 2022)

Geophysical Data Analysis
(MSc, 2016)

Practical: Noise spectra & polarization
1st TIDES (EU COST) Advanced Training School, Bertinoro (Italy), 1-5 June 2015

Geophysical Data Analysis
(MSc, 2015)

Geophysikalische Datenanalyse
(BSc, 2015)

Geophysical Data Analysis
(MSc, 2014)

ROSE School: Signal Processing and Geophysical Data Analysis
(MSc, winter school 2012)

SPIN ITN Workshops and Short Courses

4th COST-TIDES Training School in Prague, Czech Republic (programme committee)
2-7 July, 2018

4th IWGoRS Meeting on rotational seismology in Tutzing, Germany
20-23 June, 2016

AMÜSE PhD conference, Hinterriss, Austria
10-12 June, 2016

Hum workshop at the Center for Advanced Studies in Munich (CAS)
September 12, 2014

4th Quest workshop in Benodet, France
May 19-25, 2013

Neustadt workshop on "Noise and Diffuse Wavefields"
11-14 November 2012

University of Hamburg Seismology group Youtube Channel and Github

SPIN ITN Youtube Channel and Github

• AGU 2020: C. Hadziioannou, P. Neumann, J. Wassermann, H. Igel, U. Schreiber and the ROMY team - Ambient seismic noise interferometry using rotational ground motion [pdf]
• AGU 2011: C. Hadziioannou, E. Larose, P.Roux, M. Campillo, J. Wassermann, H. Igel - Do variations of the ambient noise wavefield reflect on measured seismic velocity changes? [pdf]
• QUEST Workshop 2011: C. Hadziioannou, P. Gaebler, U. Schreiber, J. Wassermann, H. Igel - Examining ambient noise using co-located measurements of rotational and translational motion, Iceland, July 2011
• EGU 2011: C. Hadziioannou, E. Larose, Y. Aoki, T. Takeda, M. Campillo - Ambient seismic noise monitoring in Chuetsu, Japan and the area affected by wave speed variations [poster]
• QUEST Workshop 2010: C. Hadziioannou, F. Brenguier, E. Larose, M. Campillo - Introduction to Monitoring velocity variations using Ambient Noise Correlation: Application to Tiltmeter data [presentation], Sardinia, September 2010
• AGU 2009: C. Hadziioannou, E. Larose, A. Baig, M. Campillo - Increasing the temporal resolution of ambient seismic noise monitoring [poster]
• Workshop on Noise and Diffuse Wavefields, Neustadt, July 2009: C. Hadziioannou, E. Larose, O. Coutant, P. Roux, M. Campillo - Stability of Monitoring Weak Changes in Multiply Scattering Media with Ambient Noise Correlation: Laboratory Experiments. [extended abstract]
• AGU 2008: C. Hadziioannou, E. Larose, M. Campillo, P. Roux - Monitoring Weak Changes in Multiply Scattering Media with Coda Waves: Laboratory Experiments [poster]
• Joint Japanese/French workshop, Tokyo, June 2008: C. Hadziioannou - Postseismic relaxation along the San Andreas fault at Parkfield investigated with continuous seismological observations