Akihiko Yokoo,
Assistant Professor

Aso Volcanological Laboratory, Institute for Geothermal Science,
Graduate School of Science, Kyoto University
Minami-Aso, Kumamoto, 869-1404 Japan
TEL +81 967 67 0022; FAX +81 967 67 2153
e-mail: yokoo/at/aso.vgs.kyoto-u.ac.jp


CURRENT RESEARCH


CURRICULUM VITAE


LIST OF PUBLICATIONS

  1. submitted papers (under review):
    1. Tournigand, P.Y., Taddeucci, J., Gaudin, D., Fernandez, J.J.P., Del Bello, E., Scarlato, P., Kueppers, U., Sesterhenn, J., and Yokoo, A., The initial development of transient volcanic plumes as a function of source conditions, Journal of Geophysical Research, submitted in March 2017.
    2. Yamamoto, K., Ohkura, T., Yokoo, A., Tameguri, T., Sonoda, T., and Inoue, H., Vertical ground deformation related with the 2014 and 2015 eruptions at Kuchierabujima volcano, Japan detected by repeated precise leveling surveys, Journal of Natural Disaster Science, submitted in February 2017.
  1. journals (peer reviewed):
    1. McKee, K., Fee, D., Yokoo, A., Matoza, R., and Kim, K., Analysis of gas jetting and fumarole acoustics at Aso Volcano, Japan, Journal of Volcanology and Geothermal Research, 10.1016/j.jvolgeores.2017.03.029, accepted in March 2017.
    2. Kazahaya, R., Shinohara, H., Mori, T., Iguchi, M., and Yokoo, A., Pre-eruptive inflation caused by gas accumulation: Insight from detailed gas flux variation at Sakurajima volcano, Japan, Geophysical Research Letters, 43, 11219-11225, 10.1002/2016GL070727, 2016.
    3. Aizawa, K., Cimarelli, C., Alatorre-Igbargüengoitia, M.A., Yokoo, A., Dingwell, D.B., and Iguchi, M., Physical properties of volcanic lightning: constraints from magnetotelluric and video observations at Sakurajima volcano, Japan, Earth and Planetary Science Letters, 444, 45-55, doi:10.1016/j.epsl.2016.03.024, 2016.
    4. Cimarelli, C., Alatorre-Igbargüengoitia, M.A., Aizawa, K., Yokoo, A., Díaz-Marina, A., Iguchi, M., and Dingwell, D.B., Multiparametric observation of volcanic lightning: Sakurajima volcano, Japan, Geophysical Research Letters, 43, 4221-4228, doi:10.1002/2015GL067445, 2016.
    5. Kim, K., Fee, D., Yokoo, A., and Johnathan, M.L., Acoustic source inversion to estimate volume flux from volcanic explosions, Geophysical Research Letters, 42, 5243-5249, doi:10.1002/2015GL064466, 2015.
    6. Yokoo, A. and Miyabuchi, Y., Eruption at the Nakadake 1st crater of Aso Volcano started in November 2014 (in Japanese), Bulletin of Volcanological Society of Japan, 60, 275-278, doi:10.18940/kazan.60.2_275, 2015.
    7. Fee, D., Yokoo, A., and Johnson, J.B., Introduction to an open communitiy infrasound dataset from the actively erupting Sakurajima Volcano, Japan, Seismological Research Letter, 85, 1151-1162, doi:10.1785/0220140051, 2014.
    8. McKee, K., Fee, D., Rowell, C., and Yokoo, A., Network-based evaluation of the infrasonic source location at Sakurajima Volcano, Seismological Research Letter, 85, 1200-1211, doi:10.1785/0220140119, 2014.
    9. Yokoo, A., Suzuki, Y.J., and Iguchi, M., Dual infrasound sources from a Vulcanian eruption of Sakurajima volcano, inferred from cross-array observation, Seismological Research Letter, 85, 1212-1222, doi:10.1785/0220140047, 2014.
    10. Suwa, H., Suzuki, Y.J., and Yokoo, A., Estimation of exit velocity of volcanic plume from analysis of vortex structures, Earth and Planetary Science Letters, 385C, 154-161, doi:10.1016/j.epsl.2013.10.032, 2014.
    11. Shimano, T., Nishimura, T., Chiga, N., Yoshibasaki, Y., Iguchi, M., Miki, D., and Yokoo, A., Development of automatic volcanic ash sampling apparatus at active volcanoes, Bulletin of Volcanology, 73, 773, doi:10.1007/s00445-013-0773-7, 2013.
    12. Ichihara, M., Lyons, J.J., and Yokoo, A., Switching from seismic to seismo-acoustic harmonic tremor at a transition of eruptive activity during the Shinmoe-dake 2011 eruption, Earth, Planets, and Space, 65, 633-653, doi:10.5047/eps.2013.05.003, 2013.
    13. Yokoo, A., Iguchi, M., Tameguri, T. and Yamamaoto, K., Processes prior to outburst of Vulcanian eruption at Showa crater of Sakurajima volcano, Bulletin of Volcanological Society of Japan, 163-181, 2013. abstract
    14. Ichihara, M., Takeo, M., Yokoo, A., Oikawa, J. and Ohminato, T., Monitoring volcanic activities using correlation patterns between infrasound and ground motion, Geophysical Research Letters, 39, L04304, doi:10.1029/2011GL050542, 2012.
    15. Aizawa, K., Kanda, W., Ogawa, Y., Iguchi, M., Yokoo, A., Yakiwara, H. and Sugano, T., Temporal changes in electrical resistivity at Sakurajima volcano from continuous magnetotelluric observations: Possible indication of lateral magma degassing, Journal of Volcanology and Geothermal Research, 199, 165-175, doi:10.1016/j.jvolgeores.2010.11.003, 2011.
    16. Yokoo, A. and Iguchi, M., Using infrasound waves from eruption video to explain ground deformation preceding the eruption of Suwanosejima volcano, Japan, Journal of Volcanology and Geothermal Research, 196, 287-294, doi:10.1016/j.jvolgeores.2010.08.008, 2010.
    17. Aizawa, K., Yokoo, A., Kanda, W., Ogawa, Y. and Iguchi, M., Magnetotelluric pulses generated by volcanic lightning at Sakurajima volcano, Japan, Geophysical Research Letters, 37, L17301, doi:10.1029/2010GL044208, 2010.
    18. Yokoo, A., Continuous thermal monitoring of the 2008 eruptions at Showa crater of Sakurajima volcano, Japan, Earth, Planets and Space, 61, 1345-1350, doi:10.1186/BF03352987, 2009.
    19. Yokoo, A., Tameguri, T. and Iguchi, M., Swelling-up of lava plug associated with Vulcanian eruption at Sakurajima volcano, as revealed by infrasound record -Case study on eruption on January 2, 2007-, Bulletin of Volcanology, 71, 619-630, doi:10.1007/s00445-008-0247-5, 2009.
    20. Yokoo, A., Study on Air Pressure Waves Induced by Volcanic Eruptions -Signals Recorded in Eruption Movies- (in Japanese), Bulletin of Volcanology Society of Japan, 54, 43-50, 2009. full text
    21. Yokoo, A. and Ishihara, K., Analysis of pressure waves observed in Sakurajima eruption movies, Earth, Planets and Space, 59, 177-181, doi:10.1186/BF03352691, 2007.
    22. Yokoo, A., Iguchi, M. and Ishihara, K., Geothermal activity on the flank of Sakurajima volcano inferred from infrared thermal observation (in Japanese with English abstract), Bulletin of Volcanological Society of Japan, 52, 121-126, 2007. abstract full text
    23. Yokoo, A., Ichihara, M., Goto, A. and Taniguchi, H., Atmospheric pressure waves in the field of volcanology, Shock Waves, 15, 295-300, doi:10.1007/s00193-006-0009-2, 2006.
    24. Yokoo, A., Maeno, F. and Taniguchi, H., Asama Explosion of September 1st, 2004 - On the Damage to Glass Windows and Estimation of Explosion Energy (in Japanese with English abstract), Bulletin of Volcanological Society of Japan, 50, 195-201, 2005. abstract full text
    25. Yokoo, A. and Taniguchi, H., Application of video image processing to detect volcanic pressure waves: A case study on archived images of Aso volcano, Japan, Geophysical Research Letters, 31, L23604, doi:10.1029/2004GL021183, 2004.
    26. Yokoo, A., Ichihara, M. and Taniguchi, H., Flashing arc on Izu-Oshima 1986 eruption (in Japanese with English abstract), Bulletin of Volcanological Society of Japan, 49, 299-304, 2004. abstract full text
    27. Yokoo, A., Taniguchi, H., Goto, A. and Oshima, H., Energy and depth of Usu 2000 phreatic explosions, Geophysical Research Letters, 29, 2195, doi:10.1029/2002GL015928, 2002.
    28. Yokoo, A., Taniguchi, H., Oshima, H., Goto, A., Miyamoto, T. and Research Group on Volcanic Explosions, Study on the Usu 2000 phreatic explosions in terms of field explosion experiments (in Japanese with English abstract), Bulletin of Volcanological Society of Japan, 47, 243-253, 2002. full text
  1. transactions and reports (reviewed inside or non-reviewed):
    1. Yamamoto, K., Yoshikawa, S., Matsushima, T., Ohkura, T., Yokoo, A., Inoue, H., Mishima, T., Uchida, K., Sonoda, T., Seki, K., Komatsu, S., Hotta, K., and Fujita, S., Vertical ground deformation in Sakurajima Volcano measured by precise leveling survey conducted in November 2014 (in Japanese), Annuals of Disaster Prevention Research Institute, Kyoto University, 58B, 70-75, 2015. full text
    2. Yamamoto, K., Matsushima, T., Yoshikawa, S., Ohkura, T., Yokoo, A., Aizawa, K., Inoue, H., Mishima, T., Uchida, K., Sonoda, T., Seki, K., Komatsu, S., Hotta, K., Takahashi, A., Toyofuku, T., Asano, H., and Narita, T., Vertical ground deformation in Sakurajima Volcano and around Aira Caldera measured by precise leveling conducted in October and November 2013 (in Japanese), Annuals of Disaster Prevention Research Institute, Kyoto University, 57B, 116-124, 2014. full text
    3. Nakamichi, H., Aoyama, H., Nishimura, T., Hakiwara, H., Ohta, Y., Yokoo, A., and Iguchi, M., Seismic array observation close to the active crater at Suwanose-jima volcano, southwest Japan in the period from October to November 2010 (in Japanese), Annuals of Disaster Prevention Research Institute, Kyoto University, 56B, 227-235, 2013. full text
    4. Yamamoto, K., Sonoda, T., Takayama, T., Ichikawa, N., Ohkura, T., Yokoo, A., Yoshikawa, S., Inoue, H., Suwa, H., Matsushima, T., Fujita, S., and Kamizono, M., Vertical ground deformation in and around Sakurajima volcano measured by precise leveling (in Japanese), Annuals of Disaster Prevention Research Institute, Kyoto University, 56B, 187-195 2013. full text
    5. Kagiyama, T. and Yokoo, A., Volcanic activity of Nakadake crater, Aso volcano, on the aspect of failed eruption (in Japanese), Monthly Chikyu, 34, 704-705, 2012.
    6. Yokoo, A. and Ichihara, M., Cross-correlation analysis of infrasound and seismic signals at Aso volcano (in Japanese), Monthly Chikyu, 34, 753-765, 2012.
    7. Yamamoto, K., Sonoda, T., Takayama, T., Ichikawa, N., Ohkura, T., Yokoo, A., Yoshikawa, S., Inoue, H., Hotta, K., Matsushima, T., Uchida, K., and Nakamoto, M., Vertical ground deformation in Sakruajima volcano measured by precise levelling survesy (during November 2010 - November 2011) (in Japanese), Annuals of Disaster Prevention Research Institute, Kyoto University, 55B, 155-161, 2012. full text
    8. Yokoo, A., Suzuki, Y.J., and Iguchi, M., Infrasound array observation at Sakurajima volcano (in Japanese), Annuals of Disaster Prevention Research Institute, Kyoto University, 55B, 163-167, 2012. full text
    9. Yamamoto, K., Sonoda, T., Takayama, T., Ichikawa, N., Ohkura, T., Yoshikawa, S., Inoue, H., Yokoo, A., Matsushima, T., Uchida, K. and Nakamoto, M. Precise leveling survey around Sakurajima volcano (November 2010) (in Japanese with English Abstract), The 11th Joint Observations of Sakurajima Volcano, 29-34, 2011. full text
    10. Yokoo, A., Shimano, T., Matsumoto, A., Miwa, M., Kazahaya, R., Mannen K., Terada, A., Suzuki, YJ, Kohno, Y., Kozono, T., Sato, E., Hoshide, T., Nakaoka, R. and Minami, S., Report of 2011 IUGG General Assembly in Melbourne, Australia (in Japanese), Bulletin of Volcanological Society of Japan, 56, 213-219, 2011.
    11. Yokoo, A., Infrasound wave from volcanic eruptions (in Japanese), Sound, 26, 11-14, 2011. full text
    12. Aizawa, K., Yokoo, A., Kanda, W. and Ogawa, Y., Magnetotelluric pulses generated by volcanic lightning at Sakurajima volcano, Japan, Conductivity Anomaly Study Report, 12-16, 2010. full text
    13. Iguchi, M., Yokoo, A. and Tameguri, T., Intensity of volcanic explosions at Showa crater of Sakurajima volcano (in Japanese with English Abstract), Annuals of Disaster Prevention Research Institute, Kyoto University, 53B, 233-240, 2010. full text
    14. Aizawa, K., Kanda, W., Ogawa, Y., Iguchi, M., Yokoo, A., Yakiwara, H. and Sugano, T. Electric resistivity change of Sakurajima volcano from magnetotelluric continuous observation (in Japanese with English Abstract), The 11th Joint Observations of Sakurajima Volcano, 73-79, 2010. full text
    15. Shimano, T., Iguchi, M., Yokoo, A. and Miki, D. Grain size monitoring of ashfall from Showa ctarter by time series sampling at Sakurajima volcano (in Japanese with English Abstract), The 11th Joint Observations of Sakurajima Volcano, 93-96, 2010. full text
    16. Yokoo, A., Iguchi, M., Tameguri, T. and Sonoda, T., Eruption activity of Showa crater of Sakurajima volcano until 2010 (in Japanese), Report of Collaborative Study of Disaster Prevention Research Institute, Kyoto University (21G-12; Principal investigator, Shimano, T.), 3-15, 2010. full text
    17. Takimoto, H., Ishimine, Y., Kinoshita, K., Yokoo, A. and Iguchi, M., Quantitative analysis of the discharge speeds of the ash clouds from Sakurajima volcano using particle image velocimetry (in Japanese with English abstract), Report of Collaborative Study of Disaster Prevention Research Institute, Kyoto University (21G-12; Principal investigator, Shimano, T.), 17-21, 2010. full text
    18. Shimano, T., Yokoo, A., Iguchi, M. and Miki, D., Petrological monitoring of Showa crater by time series sampling of ash at Sakurajima volcano (in Japanese with English abstract), Report of Collaborative Study of Disaster Prevention Research Institute, Kyoto University (21G-12; Principal investigator, Shimano, T.), 29-35, 2010. full text
    19. Iguchi, M., et al. (55th of 83 authors), The 2008 project of artificial explosion experiment at Sakurajima volcano (in Japanese with English abstract), Annuals of Disaster Prevention Research Institute, Kyoto University, 52B, 293-307, 2009. full text
    20. Yokoo, A. and Tameguri, T., Characteristics of infrasound and seismic signals associated with eruptions at Showa crater of Sakurajima volcano (in Japanese with English abstract), Annuals of Disaster Prevention Research Institute, Kyoto University, 52B, 309-317, 2009. full text
    21. Ishimine, Y., Takimoto, H., Kanda, M., Kinoshita, K., Yokoo, A. and Iguchi, M., PIV analysis of ash clouds ejected from Showa crater of Sakurajima volcano (in Japanese with English abstract), Annuals of Disaster Prevention Research Institute, Kyoto University, 52B, 319-322, 2009. full text
    22. Aizawa, K., Kanda, W., Ogawa, Y., Yokoo, A. and Iguchi, M., Shallow resistivity changes of Sakurajima volcano from magnetotelluric continuous observation, Conductivity Anomaly Study Report, 82, 2009. full text
    23. Yokoo, A., Tameguri, T., Iguchi, M. and Ishihara, K., Sequence and characteristics of the 2007 eruption at Showa crater of Sakurajima volcano (in Japanese with English abstract), Annuals of Disaster Prevention Research Institute, Kyoto University, 51B, 267-273, 2008. full text
    24. Iguchi, M., Tameguri, T. and Yokoo, A., Progress of volcanic activity in 1997-2007 (in Japanese), The 10th Joint Observations of Sakurajima Volcano, 1-18, 2008. full text
    25. Yokoo, A. and Iguchi, M., Geothermal observation on the flank of Sakurajima volcano with infrared thermal camera (in Japanese), The 10th Joint Observations of Sakurajima Volcano, 105-112, 2008. full text
    26. Yokoo, A., Tameguri, T. and Iguchi, M., Continuous monitoring of thermal activity around Showa crater of Sakurajima volcano with an infrared thermal camera (in Japanese), The 10th Joint Observations of Sakurajima Volcano, 113-122, 2008. full text
    27. Yokoo, A. and Matsushima, N., Aerial thermal observation at Sakurajima volcano (in Japanese), The 10th Joint Observations of Sakurajima Volcano, 131-136, 2008. full text
    28. Mori, T., Kagesawa, H., Hirabayashi, J., Yamamoto, K., Miki, D., Yokoo, A., Kazahaya, K., Mori, T., Ohwada, M., Shinohara, H., Saito, G. and Yasuhara, M., Change of SO2 emission rate in the recent 10 years (in Japanese), The 10th Joint Observations of Sakurajima Volcano, 137-142, 2008. full text
    29. Yokoo, A., Iguchi, M., Tameguri, T., Watada, S. and Oikawa, J., Observation of infrasound waves associated with volcanic eruptions at Sakurajima volcano (in Japanese), The 10th Joint Observations of Sakurajima Volcano, 173-181, 2008. full text
    30. Yokoo, A. and Ishihara, K., Volcanic activity around Showa Crater of Sakurajima volcano monitored with infrared and video cameras, Annuals of Disaster Prevention Research Institute, Kyoto University, 50C, 149-156, 2007. full text
    31. Goto, A., Kagiyama, T., Miyamoto, T, Yokoo, A. and Taniguchi, H., Long-term prediction of Usu volcano 2000 eruptive activity based on the measurements of heat discharge rate (in Japanese with English abstract), Geophysical Bulletin of Hokkaido University, 70, 137-144, 2007. full text
    32. Yokoo, A. and Ishihara, K., Some characters of volcanic pressure waves derived from video images, Annuals of Disaster Prevention Research Institute, Kyoto University, 49C, 219-224, 2006. full text
    33. Maeno, F., Yokoo, A., Kanno, S., Kontani, K., Kogure, M. and Taniguchi, H., Distribution of air vibration generated by the eruption of Asama volcano on September 1st, 2004 by questionnaire survey (in Japanese with English abstract), Northeast Asian Studies, 9, 243-252, 2005. full text
    34. Yokoo, A. and Taniguchi, H., Formation process of Taisho II Secondary lava flow at Sakurajima volcano (in Japanese with English abstract), Northeast Asian Studies, 5, 93-111, 2001. full text