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Henk Keers's picture

Henk Keers

Associate Professor
  • E-mailHenk.Keers@uib.no
  • Phone+47 55 58 87 48
  • Visitor Address
    Allegaten 41, Bergen
    Bergen
    Room 
    2G15a - 2140
  • Postal Address
    Postboks 7803
    5020 Bergen

Professional Appointments

University of Bergen, Department of Geoscience, Norway, Associate Professor, 2010-

Schlumberger, Oslo Technology Centre, Norway, Geophysical Advisor, 2007-2009

Schlumberger Cambridge Research, UK, Senior Research Scientist, 2000-2007

University of California, Berkeley, Department of Earth and Planetary Sciences, USA, Postdoc, 1997-2000

 

University of Cambridge, Department of Earth Science, UK, Visiting Scientist, 2019

University of Washington, Applied Physics Lab, Seattle, USA, Visiting Scientist, 2015

University of Kiel, Institute for Geoscience, Kiel, Germany, Visiting Scientist, 2015

 

Education

Princeton University, Department of Geosciences, USA, PhD, 1997

Utrecht University, Department of Geosciences, the Netherlands, BSc, 1991

 

Awards

Excellent Teaching Practitioner, University of Bergen, 2021

Invited speaker, International Conference on Underwater Acoustics, 2021

Invited speaker, American Geophysical Union, Fall Meeting, 2016

‘Best Research Project with Commercial Potential’ awarded by BTO/Sparebanken Vest, 2010

UC Berkeley, Miller Fellow, Miller Institute for Basic Research in Science, 1997-1999

 

Main research areas

  • Earthquake seismology
  • Environmental geophysics
  • Geothermal energy
  • Global seismology
  • Ocean acoustics
  • Seismic exploration

Courses

Bachelor level:

  • Introduction to Geophysics (GEOV111), 2012-2014

  • Solid Earth Physics (GEOV112), 2010-present

  • Seismic Acquisition and Data Processing (GEOV113), 2012-2013

Bachelor/Master level:

  • Computational Methods in Geophysics (GEOV219), 2011-2020

  • Global and Applied Geophysics (GEOV265), 2021-

  • Data Analysis and Inversion in Geophysics (GEOV277), 2018-2019

Master level:

  • Writing and Presentation Skills for Geoscience Students (GEOV300), 2015-2016

 

Awards

Excellent Teaching Practitioner, University of Bergen, 2021

Invited speaker, Session on Geoscience Teaching, AGU, 2017

 

Master Students

17. Machine Learning and Long Range Ocean Acoustics (ongoing) - Kristoffer Igland, M

16. Relocating Earthquakes using Seismic Networks on Small Islands: Case Studies from Heimaey (Iceland) and Jan Mayen (Norway) - Robin André Rørstadbotnen, 2019

15. Characterization of a Geothermal Field Using Multiscale Travel Time Tomography – Study of the Miravalles Geothermal Field in Costa Rica - Regine Johansen, M 2019

14. Estimation of Landscape History Using Multiple In Situ Cosmogenic Isotopes; Quantification of Erosion Rates in Rendalssølen in Norway - Audun Hitland, 2019

13. AVO Inversion Using Data Assimilation - Thomas de Jonge, M 2019

12. Comparison of a Classical PSHA and a Rupture Forecast for California - Helga Indrøy, 2018

11. Non-linear AVO Inversion - Anja Tveit, M 2018

10. Double-Difference Relocation and Empirical Green Function Analysis of Storfjorden Earthquakes - Norunn Tjåland, 2017

9. Frequency Selection Strategies for Full Waveform Inversion - Ildus Islamgulov, 2017

8. Anisotropic Properties of a Mid-Lithospheric Discontinuity in Eastern North America –  Mari Farestveit, 2017

7. The Cascadia Subduction zone: Kinky or not? An Implementation of a 2D Background Velocity Model in Teleseismic Scattered-wave Inversion - Maren Kjos Veim, 2017

6. Analysis of Magma Chamber Activity at Yellowstone from 2010 to 2017 – Marie Lien, M 2017

5. Seismic Modeling for Geothermal Reservoir Characterization - Annie Jerkins, M 2016

4. Seismo-Tectonics of the Alborz Mountains (Iran) from Local Earthquake Data – Sara Rezaei, 2015

3. Exploring the Seismicity of the Gakkel Ridge from Arctic Sea Ice - Gaute Hope, M 2013

2. The Application of Full Waveform Inversion to Carbonate Rocks – Njål Greiner, M 2013

1. Ray-Born Modeling and Waveform Inversion - Hans Christian Tengesdal, M 2013

(M stands for 'main supervisor')

 

Courses in University Pedagogy

Collegial Learning and Teaching in STEM Education, 2016-2017

Hot Moments in Teaching and Learning, 2013

Course Evaluations, 2013

Introduction to University Pedagogy, 2012-2013

 

Publications on Teaching

6. Keers, H., Research Based Teaching - Teaching using Research or Learning to do Research? Special Issue on Innovation in Teaching of The Journal for Research and Practice in College Education, 3, 2, 94-97, 2018.

5. Nyberg, B., H. Keers, Technology and Teaching Methods in Geoscience Education - Results from a Worldwide Survey, ISSOTL conference, Bergen, 2018.

4. Keers, H., J. Grytnes, A. Salvanes, R. Waagbø, How Technology Motivates and Enhances Students’ Learning, EuroSOTL conference, University of Lund, 2017.

3. Keers, H., S. Rondenay, Y. Harlap, I. Nordmo, Active Learning, Digital Teaching and Assessment of University Science Courses, SOTL Conference, University of Bergen, 2017.

2. Keers, H., S. Rondenay, Y. Harlap, I. Nordmo, Teaching Computational Geophysics Classes Using Active Learning Techniques (Invited), presentation at AGU fall meeting, San Francisco, 2016.

1. Keers, H., S. Rondenay, Y. Harlap, I. Nordmo, Resources for Computational Geophysics Courses, EOS, 95, 37, 335-336, 2014.

Scientific Papers (Peer Reviewed)

31. de Jonge, T., M. Alerini, H. Keers, AVO Inversion using Data Assimilation: Sensitivity Analysis and Application to the Volve Reservoir (submitted).

30. Jeddi, Z., L. Ottemöller, H. Keers, M. Sørensen, T. Barreyre, The impact of a moderate size earthquake on the Loki Castle hydrothermal vent field: Observations from OBS recordings (submitted).

29. Sarajærvi, M., H. Keers, Efficient 3D Viscoelastic Full Waveform Inversion using ray- Born integrals (submitted).

28. Newrkla, K, H. Ash Shidiqqi, A. Jerkins, L. Ottemöller, H. Keers, Implications of 3D Seismic Raytracing on Focal Mechanism Determination, Bulletin Seismological Society of America, 109, 6, 2746-2754, 2019.

27. Sarajærvi, M., H. Keers, Ray-based Modelling and Imaging in Viscoelastic Media Using Graphics Processing Units, Geophysics, 84, 5, 1-12, 2019.

26. Demuth, A., L. Ottemöller, H. Keers. QLg wave Tomography beneath Norway, Journal of Seismology, doi/10.1007/s10950-018-9798-x, 1-14, 2018.

25. Moghaddam, P., R. Khajavi and H. Keers, Travel time computations using a compact eikonal equation for vertical transverse isotropic media, Geophysical Prospecting, doi: 10.1111/1365-2478.12636, 2018.

24. Sarajærvi, M., H. Keers, Computation of ray-Born seismograms using isochrons, Geophysics, 83, T245-256, 2018.

23. Minakov, A., H. Keers, D. Kolyukhin, H. Tengesdal, Acoustic waveform inversion for ocean turbulence, Journal of Physical Oceanography, 47, 1473-1491, 2017

22. Cristiano L., T. Meier, F. Krüger, H. Keers, C. Weidle, Teleseismic P-wave polarization analysis at the Gräfenberg array, Geophysical Journal International, 207 (3), 1456-1471, 2016.

21. Demuth, A., L. Ottemöller, H. Keers, Ambient noise levels and detection threshold in Norway, Journal of Seismology, DOI 10.1007/s10950-016-9566-8, 2016.

20. Atakan, K., Bjerrum, L., Bungum, H., Dehls, J., Kaynia, A., Keers, H., Kierulf, H., Kværna, T., Langeland, T., Lindholm, C., Maupin, V., Ottemöller, L., Sørensen, M., Yuen, M., The European Plate, Observing System and the Arctic, Arctic, 68, 1-7, 2015.

19. Mikhalevsky, P., Sagen, H., Worcester, P., Baggeroer, A., Orcutt, J., Moore, S., Lee, C.; Vigness-Raposa, K., Freitag, L., Arrott, M., Atakan, K., Beszczynska-Möller, A., Duda, T., Dushaw, B., Gascard, J., Gavrilov, A., Keers, H., Morozov, A., Munk, W., Rixen, M., Sandven, S., Skarsoulis, E., Stafford, K., Vernon, F., Yuen, M., Multipurpose Acoustic Networks in the Integrated Arctic Ocean Observing System, Arctic, 68, 11-27, 2015.

18. Moghaddam, P., H. Keers, F. Herrmann, W. Mulder, A new optimization approach for source-encoding full-waveform inversion, Geophysics, 78, R125-R132, 2013.

17. Moghaddam, P., A. Libak, H. Keers, R. Mjelde, Efficient and accurate modelling of ocean bottom seismometer data using reciprocity, Geophysics, 77, T211-T220, 2012.

16. Libak, A., R. Mjelde, H. Keers, J. I. Faleide, Y. Murai, An integrated geophysical study of Vestbakken Volcanic Province, Western Barents Sea, and adjacent oceanic crust, Marine Geophysical Research, 33, 185-207, 2012.

15. Minakov, A, R. Mjelde, J. I. Faleide, E. Flueh, A. Dannowski, H. Keers, Mafic Intrusions East of Svalbard Imaged by Active-Source Seismic Tomography, Tectonophysics, 518- 521, 106-118, dx.doi.org/10.1016/j.bbr.2011.03.031, 2012.

14. Libak, A., C. H. Eide, R. Mjelde, H. Keers, E. R. Flueh, From pull-apart basins to ultraslow spreading: Results from the western Barents Sea Margin, Tectonophysics, 518-521, 44- 61, doi:10.1016/j.tecto.2011.09.020, 2011.

13. Farmani, M. B., N.-O. Kitterød, H. Keers, Estimation of Unsaturated Flow Parameters Using GPR Tomography and Groundwater Table Data, Vadose Zone Journal, 7, 1-14, doi10.2136/vzj 2007-0169, 2008.

12. Farmani, M. B., N.-O Kitterød, H. Keers, Inverse Modeling of Unsaturated Flow Parameters Using Dynamic Geological Structure Conditioned by GPR Tomography, Water Resources Research, 44, W08401, doi:10.129/2007WR006251, 2008.

11. Vasco, D. W., H. Keers, J. Khazanehdari, A. Cooke, Seismic Imaging of Reservoir Flow Properties: Resolving Water Influx and Reservoir Permeability, Geophysics, 73, O1-O13, 2008.

10. Farmani, M. B., H. Keers, N.-O. Kitterød, Time-Lapse GPR Tomography of Unsaturated Water Flow in an Ice-Contact Delta, Vadose Zone Journal, 6, 46-57, 2007.

9. Keers, H., D. Vasco, L. Johnson, Determination of Porosity and Saturation Using Seismic Waveform Inversion, Stud. Geophys. Ged., 51, 119-140, 2007.

8. Amodei, D., H. Keers, D. Vasco, L. Johnson, Computation of Uniform Waveforms Using Complex Rays, Physical Review E, 73, 036704 (1-14), 2006.

7. Vasco, D., H. Keers, J. Peterson, E. Majer, Zeroth Order Asymptotics: Waveform Inversion of the Lowest Degree, Geophysics, 68, 614-628, 2003.

6. Chapman, C. H., H. Keers, Application of the Maslov Seismogram Method in Three Dimensions, Stud. Geophys. Ged., 46, 615-649, 2002.

5. Keers, H., D. Vasco, L. Johnson, Viscoacoustic Crosswell Imaging Using Asymptotic Waveforms, Geophysics, 66, 861-870, 2001.

4. Vasco, D., H. Keers, K. Karasaki, Estimation of Reservoir Properties Using Transient Pressure Data: an Asymptotic Approach, Water Resources Research, 36, 3447-3465, 2000.

3. Keers, H., L. Johnson, D. Vasco, Acoustic Crosswell Imaging Using Asymptotic Waveforms, Geophysics, 65, 1569-1582, 2000.

2. Keers, H., F. A. Dahlen, G. Nolet, Chaotic Ray Behavior in Regional Seismology, Geophysical Journal International, 131, 361-380, 1997.

1. Keers, H., G. Nolet, F. A. Dahlen, Ray Theoretical Analysis of Lg, Bulletin of the Seismological Society of America, 86, 726-736, 1995.

Conference Publications

42. Keers, H., K. Galtung, M. Sarajærvi, G. Hope, Efficient Modeling Methods for Ocean Acoustics (Invited), International Conference on Underwater Acoustics, 2021.

41. Shidiqqi, A., Newrkla, K., A. Jerkins, H. Keers, L. Ottemöller, Implications of 3D teleseismic ray-tracing on the determination of focal mechanisms, AGU fall meeting, 2019.

40. Sarajærvi, M., H. Keers, Efficient Modeling and Imaging in Viscoelastic Media Using GPUs, EAGE meeting, Copenhagen, 2018.

39. Demuth, A., Ottemöller, L., Keers, H., Lg wave attenuation tomography for Norway, European Seismological Commission meeting, 2016.

38. Minakov, A., D. Kolyukhin, H. Keers, Imaging of 3D ocean turbulence microstructure using low frequency acoustic waves, EGU meeting, 2015.

37. Demuth, A., Ottemöller, L., Keers, H., Detection limits and ambient noise levels of the Norwegian National Seismic Network, ISC meeting, 2014.

36. Cristiano L., A. Minakov, T. Meier, H. Keers, Observation and modeling of azimuthal anisotropy in the lower crust, EGU meeting, 2014.

35. Tengesdal, H, A. Minakov, H. Keers, Hybrid ray-Born and finite difference full waveform inversion, EAGE meeting, 2014.

34. Raeesi, M., K. Atakan, H. Keers, Revisiting the slip distribution of the May 1960 (Mw 9.5) Chile, IASPEI meeting, 2013.

33. Hope, G., Y. Kristoffersen, L. Ottemöller, H. Keers, J. Hall, Studying microseismicity of the Gakkel ridge from drifting sea ice, IASPEI meeting, 2013.

32. Minakov, A. N., H. Tengesdal, A. Libak, H. Keers, R. Mjelde, Acoustic and Elastic Ray- Born Modeling, EGU meeting, 2013.

31. Libak, A., P. Moghaddam, A. Minakov, H. Keers, R. Mjelde, Waveform Inversion in the northern Norwegian-Greenland Sea, EGU meeting, 2013.

30. Hope, G, Y. Kristoffersen, L. Ottemöller, H. Keers, J. Hall, Experience from studying microseismicity from drifting sea ice at the Gakkel ridge, Nordic Seismology Seminar, 2012.

29. Minakov A.N., Mjelde, R., Faleide, J.I., Huismans, R., Dannowski, A., Flueh, E., Glebovsky, V. Yu., Keers, H., Podladchikov, Y., Northern Barents Sea Evolution Linked to the Arctic Ocean, AGU Fall Meeting, 2010.

28. Jakobsen, M., H. Keers, T-matrix Approach to Seismic Modeling in the Acoustic Approximation, Lofoten Conference, 2010.

27. Jakobsen, M., H. Keers, Fast modelling of time-lapse seismic data using integral equation methods. SWLIM meeting, 2010.

26. Jakobsen, M., H. Keers, B. Ruud, I. Psencik and A. Shahraini, Waveform inversion of 4D seismic data using the ray-Born approximation in the frequency domain. EAGE meeting, 2010.

25. Farmani, M. B., N-O. Kitterød, H. Keers, Inverse Modeling of Unsaturated Flow Parameters – What can we learn from GPR Tomography? International Geological Conference (IGC), 2008.

24. Farmani, M. B., N-O. Kitterød, H. Keers, GPR Time-lapse Methods in Hydrology, Annual Conference of the Norwegian Geological Survey (NGU), 2008.

23. Childs, P., Z. Song, P. Kitchenside, C. Thomson, H. Keers, Frechet Kernels for Multiscale Seismic Inversion, SIAM MCIG Conference, 2007.

22. Farmani, M. B., N.-O. Kitterød, H. Keers, Inverse Modeling of Unsaturated Flow Parameters and Geological Structure Conditioned by Time Lapse GPR Tomography, EOS, 92, 2006.

21. Keers, H., T. Standley, A. Kania, Irregular Sampling and Seismic Imaging, EAGE, 68th EAGE Conference and Exhibition, 2006.

20. Farmani, M. B., H. Keers, N.-O. Kitterød, Imaging Unsaturated Water Flux in an Ice-Contact Delta Structure by GPR Tomography, EGU, 1-10906, 2006.

19. Amodei, D., H. Keers, D. Vasco, L. Johnson, Computing Uniformly Asymptotic Seismograms Using Complex Ray Tracing, American Geophysical Union, Fall Meeting, EOS, 90, 2005.

18. Keers, H., L. Johnson, D. Vasco, Waveform Inversion of Timelapse Data, SWILIM VI Workshop, Prague, 2005.

17. Keers, H., C. Chapman, D. Nichols, A Fast Integration Technique for the Generation of ray- Born synthetics, EAGE, 64th Conference and Exhibition, 2002.

16. Keers, H., C. Chapman, The Computation of Seismograms in 3D Heterogeneous Media using Maslov Theory, American Geophysical Union, Fall Meeting, EOS, 82, 2001.

15. Keers, H., L. Johnson, D. Vasco, Poroelastic Waveform Inversion of Crosswell Data, American Geophysical Union, Fall Meeting, EOS, 81, 2000.

14. Keers, H., D. Vasco, L. Johnson, Anelastic Waveform Inversion of High Frequency Waves, American Geophysical Union, Fall Meeting, EOS, 80, 1999.

13. Feighner, M. A., R. Gritto, T. M. Daley, H. Keers, E. L. Majer, Seismic Studies at the Ryepatch (Nevada) Geothermal Reservoir, American Geophysical Union, EOS, 80, 1999.

12. Keers, H., L. Johnson, D. Vasco, High Frequency Waveform Inversion of Cross Well Data, Meeting of the International Union of Geodesy and Geophysics, page B219, 1999.

11. Keers, H., L. Johnson, D. Vasco, Cross Well Imaging of Laboratory Data, Annual Meeting of the Seismological Society of America, Seism. Res. Lett., 70, 259, 1999.

10. Keers, H., G. Nolet and F. A. Dahlen, Wave Chaos and Maslov Integrals, EOS, 77, 178, 1996.

9. Keers, H., G. Nolet and F. A. Dahlen, Crustal Wave Propagation in California, EOS, 77, 524, 1996.

8. Keers, H., G. Nolet and F. A. Dahlen, The computation of amplitude envelopes in strongly heterogeneous media; theory and applications, EOS, 77, AGU Fall meeting, F523, 1996.

7. Keers, H., K. Vogfjörd, G. Nolet, F. A. Dahlen, High Frequency Propagation of Crustal Waves, Proceedingsof the 18th Annual Seismic Research Symposium on Monitoring a Comprehensive Test Ban Treaty, 196-202,1996.

6. Keers, H., K. Vogfjörd, G. Nolet, F. A. Dahlen, Effect of Explosion Depth and Crustal Heterogeneity on Lg Waves, Proceedings of the 17th Annual Seismic Research Symposium on Monitoring a Comprehensive Test Ban Treaty, 895-902, 1995.

5. Keers, H., G. Nolet and F. A. Dahlen, Chaos and Lg waves, EOS, AGU spring meeting, S204, 1995.

4. Vogfjörd, K., H. Keers, G. Nolet, F. A. Dahlen and R. Phinney, Composition of Lg, NATO Advanced Study Institute on Monitoring a Comprehensive Test Ban Treaty, Alvor, Portugal, 1995.

3. Keers, H., K. Vogfjörd, G. Nolet and R. Phinney, Lg waves by ray and mode summation; a first comparison, 16th Annual seismic research symposium, AFOSR, 1994.

2. Keers, H., K. Vogfjörd, G. Nolet and R. Phinney, Lg synthesis in media with undulating surfaces by ray summation, EOS, AGU fall mtg, 420, 1994.

1. Keers, H., G. Nolet, Lg-wave propagation using mode and ray summation. EOS, Transactions AGU spring mtg, suppl, 227, 1994.

 

Patents

9. Keers, H., Melbø-Strommen, A., Hopperstad, J.-F., Robertsson, J., Kragh E., Svendsen, M., Yang, L., Frivik, S., Acquiring near-zero offset survey data, Patent WO2009/148900, US patent 8467264, 2013.

8. Keers, H., Vongtragool, S., Welker, K., Frivik, S., Groenaas, H., Determining Positioning of Survey Equipment Using a Model, US patent 8094513, 2012.

7. Keers, H., Geophysical Signal Processing, US patent 0128817, 2011.

6. Keers, H., Kitchenside, P., Nichols, D., Rentsch, S., Busanello, G., Migration velocity analysis using seismic data, US patent 0085413, 2011.

5. Kitchenside, P., Busanello, G., Keers, H., Imaging with Vector Measurements, Patent WO/2010/091115, US/2010/0202250, 2010.

4. Keers, H., Childs, P., Using Waveform Inversion to Determine Properties of a Subsurface Medium, Patent WO/2010/0065778, US patent 0142316, 2010.

3. Tustin, G., Meeten, G., Jones, T., Anderson, V., Trætten, Ø., Keers, H., Kristiansen, O., Heieren, N.-H., Combee, L., Kjellesvig, B., Seismic Data Acquisition Assembly, Patent WO/2010/021880, US/2010/00039890, 2010.

2. Keers, H., H. Bernth, C. Chapman, D. Nichols, Processing Seismic Data, Patent US/2005/0143923, 2005.

1. Martin, J., E. Muyzert, H. Keers, J. Robertsson, N. Goujon, K. Tjom, Seismic Sensing Cable Catenary Shape Determination, Patent GB/2003/004476, 2003.

Reports and White Papers

Keers, H (one of 13 co-authors), European Plate Observing System: A European large scale infrastructure initiative for solid Earth science observations, Norwegian White Paper, 2012.

Feighner, M. A., R. Gritto, T. M. Daley, H. Keers, E. L. Majer, Three-Dimensional Seismic Imaging of the Ryepatch Geothermal Reservoir, Earth Sciences Division, Lawrence Berkeley National Laboratory, Report LBNL-44119, 1999.

Numerous confidential reports and invention disclosures for Schlumberger

Research groups