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Presentations

Oral and Poster Presentations at International Conferences

  1. B. L. Lysak, Y. Song, C. L. Waters, M. D. Sciffer, and Y. Obana, 'Inter-Hemispheric Differences Due to Ionospheric Asymmetries'(Oral, Invited), American Geophysical Union (AGU) Fall Meeting, 12-16 Dec, 2016, San Francisco, USA.
     
  2. N. Maruyama, P.G. Richards, M. Denton, M. G. Henderson, Y. Obana, J. Raeder, M. R. Hairston, M. Fedrizzi, T. J. FUller-Rowell, T.-W. Fang, M. Codrescu, 'Investigation of the distribution of cold plasmas across geospace during storms using the IPE model (Poster)', American Geophysical Union (AGU) Fall Meeting, 12-16 Dec, 2016, San Francisco, USA.
     
  3. Y. Obana, F. W. Menk, C. L. Waters, M. D. Sciffer, R. L. Lysak, M. B. Moldwin, I. R. Mann, D. Boteler, V. Angelopoulos, and C. T. Russell, 'Latitudinal distribution of quarter-wave length standing Alfvén modes (Oral)', 26th General Assembly of the International Union of Geodesy and Geophysics (IUGG), 22 Jun - 2 July, 2015, Prague, Czech Republic.
     
  4. Yuki Obana, Colin L. Waters, Murray D. Sciffer, Gareth Sciffer, Frederick W. Menk, Robert L. Lysak, 'Characteristics of quarter wave standing Alfven waves observed by the New Zealand magnetometer array (Oral)', Chapman Conference on Low-Frequency Waves in Space Plasmas, 31 Aug-05 Sep 2014, Jeju Isl, Korea.
     
  5. Yuki Obana, Nozomu Nishitani, Tomoaki Hori, Mariko Teramoto, Masahito Nose, Akimasa Yoshikawa, 'A Study of Ionospheric Pc 4 Plasma Oscillation Observed by the Hokkaido HF Radar and its Comparison with Geomagnetic Pulsation on the Ground (Poster)', Asia Oceania Geosciences Society (AOGS) 11th Annual Meeting, Sapporo, 28 Jul-01 Aug, 2014, Sapporo, Japan.
     
  6. Y. Obana, C. L. Waters, M. D. Sciffer, G. Sciffer, F. W. Menk, and R. L. Lysak, 'Mode Transfer from Quarter-Wave to Half-Wave Modes of Standing Alfvén Waves Around the Dawn Terminator (Poster)', Asia Oceania Geosciences Society (AOGS) 11th Annual Meeting, Sapporo, 28 Jul-01 Aug, 2014, Sapporo, Japan.
     
  7. G. D. Sciffer, C. L. Waters, M. D. Sciffer, Y. Obana, 'Modelling ULF Quarter-wave modes', the 13th Australian Space Science Conference (ASSC), 30 Sep - 2 Oct 2013, Sydney, Australia.
     
  8. Y. Obana, F. W. Menk, C. L. Waters, M. D. Sciffer, A. Yoshikawa, F. Honary, M. B. Moldwin, I. R. Mann, D. Boteler, V. Angelopoulos, and C. T. Russell, 'Characteristics of Quarter-Wave ULF Pulsations around the dawn terminator (Oral)' Asia Oceania Geoscience Society (AOGS) 10th Annual Meeting, 24 - 28 June 2013, Brisbane, Australia.
     
  9. Shiokawa K., Fujii, R., Hashimoto, K., Hosokawa, K., Kadokura A., Kawano H., Kikuchi T., Kitamura K., Miyoshi Y., Nagatsuma T., Nishitani N., Obana Y., Ogawa Y., Ohya H., Okada M., Otsuka Y., Ozaki M., Sato N., Shinohara M., Tadokoro H., Taguchi M., Tanaka Y., Tanimori T., Tsuchiya F., Yamagisi H., Yoshikawa A., Yukimatsu A., and Yumoto K. , 'Ground Network Observations for the ERG Project (Invited)', THEMIS workshop, Fairbanks, Alaska, March 25-28, 2013.
     
  10. Y. Obana, I. Yoshikawa, F. W. Menk, C. L. Waters, M. D. Sciffer, A. Yoshikawa, M. B. Moldwin, I. R. Mann, and D. Boteler, V. Angelopoulos, and C. T. Russell, 'A Study of Latitudinal Distribution of Quarter-Wave ULF Pulsations (Oral)', International Union of Geodesy and Geophysics (IUGG) 2011, 28 June - 7 July 2011, Melbourne, Australia.
     
  11. Y. Obana, I. Yoshikawa, F. W. Menk, C. L. Waters, M. D. Sciffer, A. Yoshikawa, M. B. Moldwin, I. R. Mann, and D. Boteler, 'Multipoint Observation of Quarter-Wave Length, Standing Alfvén Modes (Oral)', American Geophysical Union (AGU) 2010 Fall Meeting, San Francisco, USA, 13-17/Dec/2010.
     
  12. F. W. Menk, Y. Obana, C. L. Waters, M. D. Sciffer, A. Yoshikawa, I. Yoshikawa, M. B. Moldwin, I. R. Mann, and D. Boteler, 'Quarter Wave Field Line Resonances: Variation With Latitude', 38th COSPAR Scientific Assembly 2010, 18-25/Jul/2010, Bremen, Germany.
     
  13. I. Yoshikawa, G. Murakami, K. Yoshioka, Y. Obana, K. Sakai, T. Homma, A. Yamazaki, M. Taguchi, M. Kagitani, ‘Plasmaspheric EUV image seen from the lunar orbit’, Asia Oceania Geosciences Society, 5-9/Jul/2010, Hyderabad, India.
     
  14. Y. Obana, F. W. Menk, C. L. Waters, M. D. Sciffer, A. Yoshikawa, I. Yoshikawa, M. B. Moldwin, I. R. Mann, and D. Boteler, 'Quarter-wave modes of standing Alfvén waves detected by cross-phase analysis: Latitudinal distribution', 2010 Western Pacific Geophysics Meeting, 22–25/Jun/2010, Taipei, Taiwan.
     
  15. Y. Obana, F. W. Menk, I. Yoshikawa, F. Honary, and D. Boteler, 'He+’s Rapid Refilling during Recovery Phases of Magnetic Storms', The 33rd Symposium on Space and Upper Atmospheric Sciences in the Polar Regions (第33回極域宙空圏シンポジウム), 12-13/Nov/2009, National Institute of Polar Research, Tokyo, Japan. (国立極地研究所, 東京, 日本).
     
  16. Y. Obana, F. W. Menk, I. Yoshikawa, F. Honary, and D. Boteler, 'Different Time Scales of the Plasmaspheric Refilling between the He+ and Total Mass Densities', URSI/COSPAR International Reference Ionosphere (IRI) 2009 Workshop, Kagoshima, Japan, 2-7/Nov/2009.
     
  17. G. Murakami, I. Yoshikawa, Y. Obana, K. Yoshioka, G. Ogawa, A. Yamazaki, M. Kagitani, M. Taguchi, and M. Kikuchi, ‘Global Images of the Plasmapause from the Meridian Perspective Observed by KAGUYA’, International Association of Geomagnetism and Aeronomy (IAGA) 2009, Sopron, Hungary, 24-29/Aug/2009.
     
  18. Y. Obana, F. W. Menk, and I. Yoshikawa, ‘Simultaneous Observation of Plasmaspheric Refilling using ULF and He+ Imaging data’, International Association of Geomagnetism and Aeronomy (IAGA) 2009, Sopron, Hungary, 24-29/Aug/2009.
     
  19. Y. Obana, F. W. Menk, and I. Yoshikawa, ‘A Conjunction Study of Plasmaspheric Drainage Plumes in June 2001 using IMAGE-EUV and Cross-Phase Measurements’, International Association of Geomagnetism and Aeronomy (IAGA) 2009, Sopron, Hungary, 24-29/Aug/2009.
     
  20. Y. Obana, F. Ezawa, G. Murakami, and I. Yoshikawa, ‘An Intercomparison Study of the Plasmapause between IMAGE-EUV SELENE-UPI, and Cross-phase Measurements’, International Association of Geomagnetism and Aeronomy (IAGA) 2009, Sopron, Hungary, 24-29/Aug/2009.
     
  21. G. Murakami, F. Ezawa, Y. Obana, K. Yoshioka, G. Ogawa, I. Yoshikawa, A. Yamazaki, M/ Kagitani, M. Taguchi, M. Kikuchi, ‘Meridional distribution of the plasmapause observed by Telescope for Extreme Ultraviolet onboard KAGUYA spacecraft’, Asia Oceania Geosciences Society (AOGS), Singapore, 11-15/Aug/2009.
     
  22. Y. Obana, I. Yoshikawa, and F. W. Menk, ‘A Study of Plasmaspheric Drainage Plumes Using Coordinated Ground-based Magnetometers and He+ Imaging Data’, Asia Oceania Geosciences Society (AOGS), Singapore, 11-15/Aug/2009.
     
  23. I. Yoshikawa, A. Yamazaki, G. Murakami, K. Yoshioka, F. Ezawa, S. Kameda, W. Miyake, M. Taguchi, M. Kikuchi, S. Okano, T. Sakanoi, M. Kagitani, Y. Obana, M. Nakamura, 'Plasmasphere from the Moon', American Geophysical Union (AGU) 2008 Fall Meeting, San Francisco, USA, 15-19/Dec/2008.
     
  24. Y. Obana, I. Yoshikawa, and F. W. Menk, 'Observation of the Plasmaspheric depletion and refilling ~Comparison between ULF waves and IMAGE-EUV Measurements~', American Geophysical Union (AGU) 2008 Fall Meeting, San Francisco, USA, 15-19/Dec/2008.
     
  25. F. W. Menk, Y. Obana, M. D. Sciffer, and C. L. Waters, 'Observations and Modelling of Quarter Wavelength Mode Standing Alfvén Waves', 2008 Western Pacific Geophysics Meeting (WPGM), Cairns, Australia, 29/Jul-1/Aug/2008.
     
  26. Y. Obana, F. W. Menk, ' Plasmaspheric Ion Refilling Rates', American Geophysical Union (AGU) 2007 Fall Meeting, San Francisco, USA, 10-14/Dec/2007.
     
  27. B. J. Fraser, S. K. Morley, F. W. Menk, C. L. Waters, P. Ponomarenko, M. D. Sciffer, S. Ables, Y. Obana, D. L. Green, 'Solar-terrestrial and space physics research at the University of Newcastle',7th Australian Space Science Conference, Sydney, Austlaria, 24-27/Sep/2007.
     
  28. Y. Obana, F. W. Menk, M. D. Sciffer and C. L. Waters, 'Quarter Waves in the Dawn Terminators at L~3', 7th Australian Space Science Conference, Sydney, Austlaria, 24-27/Sep/2007.
     
  29. Y. Obana, and F. W. Menk, 'Upward Ion Flux for L = 2.3 - 3.8 Flux Tubes in the Recovery Phase of a Moderate Storm', 7th Australian Space Science Conference, Sydney, Austlaria, 24-27/Sep/2007.
     
  30. Y. Obana, and F. W. Menk, 'Ion Refilling Rates for L = 2.3 - 3.8 Flux Tubes', Asia Oceania Geosciences Society (AOGS) 4th Annual Meeting, Bangkok, Thailand, 30/Jul-4/Aug/2007.
     
  31. Y. Obana, F. W. Menk, M. D. Sciffer and C. L. Waters, 'Quarter Waves Detected by Cross-phase Analysis', IUGG XXIV 2007, Perugia, Italy, 2-13/Jul/2007.
     
  32. Y. Obana, and F. W. Menk, 'Ion Refilling Rates for L = 2.3 - 3.8 Flux Tubes', IUGG XXIV 2007, Perugia, Italy, 2-13/Jul/2007.
     
  33. Y. Obana, and F. W. Menk, 'Plasmaspheric mass density variation during a moderate magnetic storm', American Geophysical Union (AGU) 2006 Fall Meeting, San Francisco, USA, 11-15/Dec/2006.
     
  34. Y. Obana, and F. W. Menk, 'Plasma mass density during a magnetic storm in March 2004', The Australian Institute of Physics (AIP) National Congress, Brisbane, Australia, 3-8/Dec/2006.
     
  35. D. Orita, Y. Obana, A. Yoshikawa, and K. Yumoto, 'Analysis of CPMN ULF data at the magnetic conjugate points', AGU Chapman Conference on Magnetospheric ULF Waves, San Diego, USA, 23-24/Mar/2005.
     
  36. S. Takasaki, H. Kawano , Y.-M. Tanaka , A. Yoshikawa , Y. Obana, M. Seto , M. Iijima , K. Yumoto , 'Plasmaspheric Mass Density Increase at low-Latitudes (L`1.3) During Magnetic Storms', AGU Chapman Conference on Magnetospheric ULF Waves, San Diego, USA, 23-24/Mar/2005.
     
  37. Y. Obana, K. Yumoto, D. G. Baishev , S. I. Solovyev , A. Yoshikawa , H. Kawano , and CPMN Group, 'Global Pc 5 Pulsations During the Super Storm in Late October 2003', AGU Chapman Conference on Magnetospheric ULF Waves, San Diego, USA, 21-22/Mar/2005.
     
  38. Y. Obana, A. Yoshikawa, R. J. Morris , B. J. Fraser , J. V. Olson , and K. Yumoto, 'Relationship Between toroidal and Poloidal Pc 3-5 Pulsations Observed at the Coordinated CPMN Stations', AGU Chapman Conference on Magnetospheric ULF Waves, San Diego, USA, 21-22/Mar/2005.
     
  39. K. Yumoto. and Y. Obana, 'A New Technique for Electromagnetic Monitoring of the Solid Earth by Means of Coordinated ULF-wave Observations', 2005 International Workshop on Seismo Electromagnetics, Chofu, Japan, 15/Mar/2005.
     
  40. Y. Obana, A. Yoshikawa, J. V. Olson, R. J. Morris, B. J. Fraser, S. I. Solovyev, K. Yumoto, 'Separation of Several Factors Controlling ULF Amplitude', XIth IAGA Workshop on Geomagnetic Observatory Instruments, Data Acquisition and Processing, Tsukuba, Japan, 16/Nov/2004.
     
  41. S. Abe, H. Kawano, A. Yoshikawa, K. Yumoto, Y. Obana, S. I. Solovyev, D. G. Baishev, and J. V. Olson, 'Diagnosis of the Magnetospheric Plasma by Using the Magnetometer Network run by Kyushu University', CAWSES Kickoff Meeting, Irako, Japan, 16-17/Jun/2004.
     
  42. Y. Obana, A. Yoshikawa, J. V. Olson, R. J. Morris, B. J. Fraser, S. I. Solovyev, K. Yumoto, 'A New Technique for Analysis of ULF Waves: To Understand the Magnetosphere-Ionosphere Coupling', CAWSES Kickoff Meeting, Irako, Japan, 16-17/Jun/2004.
     
  43. Y. Obana, A. Yoshikawa, J. V. Olson, R. J. Morris, B. J. Fraser, S. I. Solovyev, and K. Yumoto, 'Techniques to investigate the ionospheric effect on ULF waves', WARS'04 conference, Hobart, Australia, 19/Feb/2004.
     
  44. Abe, S., K. Yumoto, H. Kawano, A. Yoshikawa, Y. Obana, S. I. Solovyev, D. G. Baishev, J. V. Olson, E. W. Worthington, and the CPMN group, 'The diagnosis of the plasmapause by ground magnetometer network observation at multiple local times', ISEE2003,Fukuoka, Japan, 14/Nov/2003.
     
  45. Y. Obana, A. Yoshikawa, R. J. Morris, B. J. Fraser, S. I. Solovyev, and K. Yumoto, 'Environment Factors of Pc 4 Amplitudes Observed at the CPMN Stations', ISEE2003,Fukuoka, Japan, 14/Nov/2003.
     
  46. S. Abe, K. Yumoto, H. Kawano, A. Yoshikawa, Y. Obana, S. I. Solovyev, D. G. Baishev, J. V. Olson, and E. W. Worthington, 'The plasmapause detection by multiple ground magnetic field observations at different local times', IUGG2003,Sapporo, Japan, 11/Jul/2003.
     
  47. Y. Obana, A. Yoshikawa, R. J. Morris, B. J. Fraser, S. I. Solovyev, and K. Yumoto, 'Several Factors of Pc 3-5 amplitudes obtained by the coordinated CPMN stations', IUGG2003,Sapporo, Japan, 11/Jul/2003.
     
  48. Y. Obana, A. Yoshikawa, R. J. Morris, B. J. Fraser, J. V. Olson, S. I. Solovyev, and K. Yumoto, 'LT and MLT Dependencies of Pc 4 Amplitudes at CPMN Conjugate Stations', American Geophysical Union 2001 Fall Meeting, San Francisco, USA, 12/Dec/2001.
     
  49. Y. Obana, A. Yoshikawa, K. Yumoto, J. V. Olson, R. J. Morris, and B. J. Fraser, 'Quantitative Analysis of the North-South Asymmetry of Pc 3-5 Amplitudes Observed at the High-Latitude Conjugate Stations' IAGA-IASPEI Joint Scientific Assembly, Hanoi, Vietnam, 22/Aug/2001.
     
  50. Y. Obana, A. Yoshikawa, K. Yumoto, J. V. Olson, and R. J. Morris, 'Effects of the Ionospheric Conditions on the ULF Pulsations Observed at Geomagnetic Conjugate Pair Stations', The First S-RAMP conference,Sapporo, Japan, 5/Oct/2000.