Hjem
Henk Keerss bilde

Henk Keers

Førsteamanuensis
  • E-postHenk.Keers@uib.no
  • Telefon+47 55 58 87 48
  • Besøksadresse
    Realfagbygget, Allégt. 41
    Rom 
    2101
  • Postadresse
    Postboks 7803
    5020 Bergen

- Seismikk og petroleum geophysikk

- Den faste Jorda physikk (jordskelv, seismisk bølgeforplantning og inversjon, gravimetri osv.)

- Geothermisk energi

- Miljø geofysikk

Geov112 (den faste jordas fysikk), Geov219 (computational methods in geophysics) og (en litt) Geov111 (geofysiske methoder) og Geov113 (refleksjonsseismisk datainnsmaling og prosessering)

Bøker
  • Keers, Henk; Salvanes, Anne Gro Vea; Grytnes, John-Arvid; Waagbø, Rune. 2017. How technologies motivate and enhance student learning. Lund University Open Access. 6 sider. ISBN: 978-1-906642-79-2.
Tidsskriftartikler
  • Demuth, Andrea; Ottemöller, Lars; Keers, Henk. 2018. QLg wave tomography beneath Norway. Journal of Seismology. 1-14. doi: 10.1007/s10950-018-9798-x
  • Moghaddam, Peyman Poor; Khajavi, Reza; Keers, Henk. 2018. Travel time computations using a compact eikonal equation for vertical transverse isotropic media. Geophysical Prospecting. 66: 1475-1484. doi: 10.1111/1365-2478.12636
  • Sarajaervi, Martin; Keers, Henk. 2018. Computation of ray-Born seismograms using isochrons. Geophysics. 83: T245-T256. doi: 10.1190/geo2017-0669.1
  • Minakov, Alexander; Keers, Henk; Kolyukhin, Dmitriy; Tengesdal, Hans Christian. 2017. Acoustic waveform inversion for ocean turbulence. Journal of Physical Oceanography. 47: 1473-1491. doi: 10.1175/JPO-D-16-0236.1
  • Cristiano, Luigia; Meier, Thomas; Krüger, Frank; Keers, Henk; Weidle, Christian. 2016. Teleseismic P-wave polarization analysis at the Gräfenberg array. Geophysical Journal International. 207: 1456-1471. doi: 10.1093/gji/ggw339
  • Demuth, Andrea; Ottemöller, Lars; Keers, Henk. 2016. Ambient noise levels and detection threshold in Norway. Journal of Seismology. 20: 889-904. doi: 10.1007/s10950-016-9566-8
  • Atakan, Kuvvet; Bjerrum, Louise Wedderkopp; Bungum, Hilmar; Dehls, John F.; Kaynia, Amir M.; Keers, Henk; Kierulf, Halfdan P.; Kværna, Tormod; Langeland, Tor; Lindholm, Conrad; Maupin, Valerie; Ottemöller, Lars; Sørensen, Mathilde B.; Yuen, Mo Yan. 2015. The European plate observing system and the Arctic. Arctic. 68: 1-7. doi: 10.14430/arctic4446
  • Mikhalevsky, Peter N.; Sagen, Hanne; Worcester, Peter Francis; Baggeroer, Arthur B.; Orcutt, John; Moore, Sue E.; Lee, Craig M.; Vigness-Raposa, Kathleen J.; Freitag, Lee; Arrott, Matthew; Atakan, Kuvvet; Beszczynska-Möller, Agnieszka; Duda, Timothy F.; Dushaw, Brian D.; Gascard, Jean Claude; Gavrilov, Alexander N.; Keers, Henk; Morozov, Andrey K.; Munk, Walter H.; Rixen, Michel; Sandven, Stein; Skarsoulis, Emmanuel; Stafford, Kathleen M.; Vernon, Frank; Yuen, Mo Yan. 2015. Multipurpose Acoustic Networks in the Integrated Arctic Ocean Observing System. Arctic. 68: 1-17. doi: 10.14430/arctic4449
  • Keers, Henk; Rondenay, Stéphane; Harlap, Yael; Nordmo, Ivar. 2014. Resources for computational geophysics courses. EOS. 95: 335-336. doi: 10.1002/2014EO370006
  • Tengesdal, Hans Christian; Minakov, Alexander; Keers, Henk. 2014. Hybrid ray-Born and finite difference full waveform inversion. EAGE Conference and Exhibition.
  • Moghaddam, Peyman Poor; Keers, Henk; Herrmann, Felix J.; Mulder, Wim A. 2013. A new optimization approach for source-encoding full-waveform inversion. Geophysics. 78: R125-R132. doi: 10.1190/GEO2012-0090.1
  • Libak, Audun; Eide, Christian Haug; Mjelde, Rolf; Keers, Henk; Flüh, Ernst. 2012. From pull-apart basins to ultraslow spreading: Results from the western Barents Sea Margin. Tectonophysics. 514: 44-61. doi: 10.1016/j.tecto.2011.09.020
  • Libak, Audun; Mjelde, Rolf; Keers, Henk; Faleide, Jan Inge; Murai, Yoshio. 2012. An integrated geophysical study of Vestbakken Volcanic Province, western Barents Sea continental margin, and adjacent oceanic crust. Marine Geophysical Researches. 33: 185-207. doi: 10.1007/s11001-012-9155-3
  • Minakov, Alexander; Mjelde, Rolf; Faleide, Jan Inge; Flueh, Ernst R.; Dannowski, Anke; Keers, Henk. 2012. Mafic intrusions east of Svalbard imaged by active-source seismic tomography. Tectonophysics. 518-521: 106-118. doi: 10.1016/j.tecto.2011.11.015
  • Moghaddam, Peyman Poor; Libak, Audun; Keers, Henk; Mjelde, Rolf. 2012. Efficient and accurate modeling of ocean bottom seismometer data using reciprocity. Geophysics. 77: T211-T220. doi: 10.1190/GEO2011-0498.1

Se fullstendig oversikt over publikasjoner i CRIStin.

Peer reviewed journals:

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, doi 10.2136/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.

 Patenter:

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, 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.

 Conference papers (since 1998)

 

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

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

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

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

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

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

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

19. 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.

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

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

16. 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.

15. 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.

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

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

12. 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.

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

10. 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.

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

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

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

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

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

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

3. 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.

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

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

 

Reports and white papers:

Keers, H. (one of 15 co-authors), EPOS white paper for the Arctic Observing Summit, Vancouver, Canada, 2013.

Keers, H (one of 13 co-authors), European Plate Observing System: An 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.

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

Keers, H., K. Vogfjord, 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.

 

 

Schlumberger/WesternGeco, Storbrittania og Norge, 2000-2007

Postdoktor, Berkeley, USA, 1997-2000

PhD Geofysikk, Princeton, USA, 1997

MSc Geofysikk, Princeton, USA, 1994

BSc Geophysics, Utrecht, Nederland, 1991

Bergen-Berkeley Seismology consortium (2013-2014)

Forskergrupper