1997

Electromagnetic Research Group for the 1995 Hyogo-ken Nanbu Earthquake, Tectonomag-
netic Signal related with the Occurrence of the 1995 Hyogo-ken Nanbu Earthquake (M7.2)
and Preliminary Results of Electromagnetic Observation around the Focal Area, J. Phys.
Earth, 45, 91-104, 1997.

Iidaka, T., and K. Obara, Seismological evidence for the existence of anisotropic zone in
the metastable wedge inside the subducting Izu-Bonin slab , Geophys. Res. Lett., 24,
3305-3308, 1997.

Iidaka, T, N. Hirata, and T. Yoshihara, Spectrum analysis of the reflected waves observed in
the Nikko region, central Japan, Pure Appl. Geophys., 150, 37-52, 1997.
Hyndman, R. D., M. Yamano, and D. A. Oleskevich, The seismogenic zone of subduction
thrust faults, Island Arc, 6, 244-260, 1997.





Kinoshita, M., and M. Yamano, Hydrothermal regime and constraints on reservoir depth
of the Jade site in the Mid-Okinawa Trough inferred from heat flow measurements, J.
Geophys. Res., 102, 3183-3194, 1997.

Kobayashi, S., and Y. Fukao, Fluid mechanical effects of gravitational differentiation of immiscible
two phases -Structure, self-sustainment and non-linearity- , Bull. Volcano. Soc.
J., 42, s, s281-s292, 1997.

Kuwahara, Y., H. Ito, H. Kawakatsu, T. Ohminato, and T. Kiguchi, Crustal heterogeneity as
inferred from seismic coda wave decomposition by small-aperture array observation, Phys.
Earth Planet. Inter., 104, 247-256, 1997.

Obayashi, M., and Y. Fukao, P and PcP travel time tomography for the core-mantle boundary,
J. Geophys. Res., 102, 17825-17841, 1997.

Nawa, K., Y. Fukao, R. Shichi, and Y. Murat, Inversion of gravity data for the terrain density
distribution in southwest Japan, J. Geophys. Res., 102, 27703-27719, 1997.



Niu, F. L., and H. Kawakatsu, Depth variation of the mid-mantle seismic discontinuity,
Geophys. Res. Lett., 24, 429-432, 1997.

Palshin, N. A., L. L. Vanyan, V. A. Kuznetsov, R. D. Medzhitov, V. M. Nikiforov, H. Utada,
and H. Shimizu, Voltage Measurements with the Cable Crossing the Sea of Japan from
Nakhodka to Naoetsu, Acta Oceanographica Taiwanica, 36, 11-24, 1997.

Shimizu, H., and D. E. Loper, Time and length scales of buoyancy-driven flow structures in
a rotating hydromagnetic fluid, Phys. Earth Planet. Inter., 104, 307-329, 1997.

Shimoizumi, M., T. Mogi, M. Nakada, T. Yukutake, S. Handa, Y. Tanaka, and H. Utada,
Electrical conductivity anomalies beneath the western sea of Kyushu, Japan, Geophys.
Res. Lett., 24, 1551-1554, 1997.

Tsuruga, K., K. Yomogida, S. Honda, H. Ito, T. Ohminato, and H. Kawakatsu, Spatial
and temporal variations of volcanic earthquakes at Sakurajima volcano, Japan, J. Vol.
Geothermal Res., 75, 337-358, 1997.

1998

Fukao, Y., E. Fujita, S. Hori, and K. Kanjo, Response of a volcanic conduit to step-like change
in magma pressure, Geophys. Res. Lett., 25, 105-108, 1998.

Hasegawa, A., S. Horiuchi, and Y. Fukao, Observations and surveys for long-term forecasts,
Zisin, 50, 191-199, 1998.

Iidaka, T., and F. L. Niu, Evidence for an anisotropic lower mantle beneath the eastern Asia:
Comparison of shear-wave splitting data of SKS and P660s , Geophys. Res. Lett., 25,
675-678, 1998.

Iidaka, T., and K. Obara, Reply, Geophys. Res. Lett., 25, 3245-3246, 1998.

Iwasaki T., O. Ozel, T. Moriya, S. Sakai, S. Suzuki, G. Aoki, T. Maeda, and T. Iidaka, Lateral
structure variation across a Collision zone in central Hokkaido, Japan, as revealed from
seismic refraction profilin, Geophys. J. Int., 132, 435-457, 1998.

Kasahara, J., H. Utada, T. Sato, and H. Kinoshita, Submarine cable OBS using a retired
submarine telecommunication cable: GeO-TOC program, Phys. Earth Planet. Inter., 108,
113-127, 1998.

Kobayashi, N., and K. Nishida, Continuous excitation of planetary free oscillations by atmospheric
disturbances , Nature, 395, 6700, 357-360, 1998.

Kobayashi, N., and K. Nishida, Atmospheric excitation of planetary free oscillations , J. Phys:
Condensed matter, 10, 49, 11557-11560, 1998.

Nawa, K, N. Suda, Y. Fukao, T. Sato, Y. Aoyama, and K. Shibuya, Incessant excitation of
the Earthfs free oscillations, Earth Planets Space, 50, 3-8, 1998.

Nawa, K., N. Suda, Y. Fukao, T. Sato, Y. Aoyama, and K. Shibuya, Incessant excitation of
the Earthfs free oscillations (Reply), Earth Planets Space, 50, 887-892, 1998.

Niu, F. L., and H. Kawakatsu, Determination of the absolute depths of the mantle transition
zone discontinuities beneath China: Effect of the stagnant slabs on the mantle transition
zone discontinuities, Earth Planets Space, 50, 11-12, 965-975, 1998.

Shimizu, H.,T. Koyama, and H. Utada, An observational constraint on the strength of the
toroidal magnetic field at the CMB by time variations of submarine cable voltages, Geophys.
Res. Lett., 25, 4023-4026, 1998.

Suda, N., N. Nawa, and Y. Fukao, Earthfs background free oscillations, Science, 279, 2089-
2091, 1998.

Tajima, F., Y. Fukao, M. Obayashi, and T. Sakurai, Evaluation of slab images in the northwestrn
Pacific, Earth Planets Space, 50, 953-964, 1998.

Tanimoto, T., J. Um, K. Nishida, and N. Kobayashi, Earthfs continuous oscillations observed
on seismically quiet days , Geophys. Res. Lett., 25, 10, 1553-1556, 1998.

Utada, H., T. Yoshino, T. Okubo, and T. Yukutake, Seismic resistivity changes observed at
Aburatsubo, central Japan, revisited, Tectonophysics, 299, 317-331, 1998.

Vanyan, L. L., H. Utada, H. Shimizu, Y. Tanaka, N. A. Palshin, V. Stepanov, V. Kouznetsov,
R. D. Medzhitov, and A. Nozdrina, Studies on the lithosphere and the water transport by
using the Japan Sea Cable (JASC): 1. Theoretical considerations, Earth Planets Space,
50, 35-42, 1998.

Vinnik, L., F. L. Niu, and H. Kawakatsu, Broad-band converted phases from midmantle
discontinuities, Earth Planets Space, 50, 11-12, 987-997, 1998.

Yamamura, K., and H. Kawakatsu, Normal mode solutions for radiation bounary conditions
with an impedance contrast, Geophys. J. Int., 134, 849-855, 1998

1999

Evans, L., P. Tarits, A. D. Chave, A. White, G. Heinson, J. H. Filloux, H. Toh, N. Seama, H.
Utada, J. R. Booker, and M. J. Unsworth, Asymmetric Electrical Structure in the Mantle
Beneath the East Pacific Rise at 17 ‹S, Science, 286, 5440, 752-756, 1999.



Ichiki, M., M. Mishina, T. Goto, N. Oshiman, N. Sumitomo, and H. Utada, Magnetotelluric
investigations for the seismically active area in Northern Miyagi Prefecture, northeastern
Japan, Earth Planets Space, 51, 351-361, 1999.

Kagiyama, T., H. Utada, and T. Yamamoto, Magma ascent beneath Unzen Volcano, SW
Japan, deduced from the electrical resistivity structure, J. Volcanol. Geotherm. Res., 89,
35-42, 1999.

Kikuchi, M., Y. Yamanaka, K. Abe, and Y. Morita, Source rupture process of the Papua New
Guinea warthquake of July 17, 1998 inferred from teleseismic body waves, Earth Planets
Space, 51, 1319-1324, 1999.

Kumagai, H., Y. Fukao, S. Watanabe, and Y. Baba, A self-organized model of earthquakes
with constant stress drops and the b-value of 1, Geophys. Res. Lett., 26, 2817-2820, 1999.
Nishida, K., and N. Kobayashi, Statistical Features of Earthfs Continuous Free Oscillations ,
J. Geophys. Res., 104, 28, 741-750, 1999.



Shimizu, H., and H. Utada, Ocean Hemisphere Geomagnetic Network: its instrumental design
and perspective for long-term geomagnetic observations in the Pacific, Earth Planets Space,
51, 917-932, 1999.

Yamaguchi, S., Y. Kobayashi, N. Oshiman, K. Tanimoto, H. Murakami, I. Shiozaki, M.Uyeshima,
H. Utada, and N. Sumitomo, Preliminary report on regional resistivity variation inferred
from the Network-MT investigation in the Shikoku district, southwestern Japan, Earth
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Yamamoto, M., H. Kawakatsu, S. Kaneshima, T. Mori, T. Tutui, Y. Sudo, and Y. Morita,
Detection of a crack-like conduit beneath the active crater at Aso volcano, Japan, Geophys.
Res. Lett., 26, 3677-3680, 1999.

2000

Fujita, E., Y. Fukao, and K. Kanjo, Strain offsets with monotonous damped oscillations
during the 1986 Izu-Oshima Volcano eruption, J. Geophys. Res., 105, 443-462, 2000.
Gorbatov, A., S. Widiyantoro, Y. Fukao, and E. Gordeev, Signature of remnant slabs in the
North Pacific from P-wave tomography, Geophys. J. Int., 142, 27-36, 2000.
Igel, H., N. Takeuchi, R. J. Geller, C. Megnin, H. P. Bunge, E. Clevede, J. Dalkolmo, and
B. Romanowicz, The COSY Project: verification of global seismic modeling algorithms,
Phys. Earth Planet. Inter., 119, 3-23, 2000.

Joseph, E. J., H. Toh, H. Fujimoto, R. V. Iyengar, B. P. Singh, H. Utada, and J. Segawa,
Seafloor electromagnetic induction studies in the Bay of Bengal, Marine Geophys. Res.,
21, 1-21, 2000.

Kawakatsu, H., S. Kaneshima, H. Matsubayashi, T. Ohminato, Y. Sudo, T. Tutui, K. Uhira,
H. Yamasato, H. Ito, and D. Legrand, Aso-94: Aso seismic observation with broadband
instruments, J. Vol. Geothermal Res., 101, 129-154, 2000.

Kunugi, T., Y. Fukao, and M. Ohno, Underdamped responses of a well to nearby swarm
earthquakes, J. Geophys. Res., 105, 7805-7818, 2000.

Legrand, D., S. Kaneshima, and H. Kawakatsu, Moment tensor analysis of near field broadband
waveforms observed at Aso volcano, Japan, J. Vol. Geothermal Res., 101, 155-169,
2000.

Mizutani, H., R. J. Geller, and N. Takeuchi, Comparison of accuracy and efficiency of timedomain
schemes for calculating synthetic seismograms, Phys. Earth Planet. Inter., 119,
75-97, 2000.

Nakatani, M, S. Kaneshima, and Y. Fukao, Size-dependent microearthquake initiation inferred
from high-gain and low-noise observations at Nikko district, Japanf, J. Geophys.
Res., 105, 28095-28109, 2000.

Nawa, K., N. Suda, Y. Fukao, T. Sato, Y. Tamura, K. Shibuya, H. McQueen, H. Virtanen,
and J. Kaariainen, Incessant excitation of the Earthfs free oscillations: global comparison
of superconducting gravimeter records, Phys. Earth Planet. Inter., 120, 289-297, 2000.

Nishida, K., N. Kobayashi, and Y. Fukao, Resonant oscillations between the solid Earth and
the atmosphere, Science, 287, 2244-2246, 2000.
Ogawa, T., and H. Utada, Coseismic piezoelectric effects due to a dislocation 1. An analytic
far and early-time field solution in a homogeneous whole space, Phys. Earth Planet. Inter.,
121, 273-288, 2000.

Ogawa, T., and H. Utada, Electromagnetic signals related to incidence of a teleseismic body
wave into a subsurface piezoelectric body, Earth Planets Space, 52, 4, 253-260, 2000.
Shimizu H., and D. E. Loper, Small-scale helicity and alpha-effect in the Earthfs core, Phys.
Earth Planet. Inter., 121, 139-155, 2000.

Sugioka, H., Y. Fukao, T. Kanazawa, and K. Kanjo, Volcanic events associated with an
enigmatic submarine earthquake, Geophys. J. Int., 142, 361-370, 2000.

Takeuchi, N., and R. J. Geller, Optimally Accurate Second Order Time-Domain Finite Difference
Scheme for Computing Synthetic Seismograms in 2-D and 3-D Media, Phys. Earth
Planet. Inter., 119, 99-131, 2000.

Takeuchi, N., R. J. Geller, and P. R. Cummins, Complete synthetic seismograms for 3-D heterogeneous
Earth models computed using modified DSM operators and theirapplicability
to inversion for Earth structure, Phys. Earth Planet. Inter., 119, 25-36, 2000.

Utada, H., and H. Munekane, On galvanic distortion of regional three-dimensional magnetotelluric
impedances, Geophys. J. Int., 140, 2, 385-398, 2000.

Utada, H., M. Neki, and T. Kagiyama, A study of annual variations in the geomagnetic total
intensity with special attention to detecting volcanomagnetic signals, Earth Planets Space,
52, 91-103, 2000.

Vanyan, L. L., N. A. Palshin, H. Utada, H. Shimizu, and V. M. Nikiforov, Study of the telluric
field using the submarine cable across the Sea of Japan, IZVESTIYA-PHYSICS OF THE
SOLID EARTH, 36, 539-548, 2000.

Widiyantoro, S., A. Gorbatov, B. L. N. Kennett, and Y. Fukao, Improving global shearwave
travel-time tomography using three dimensional ray tracing and iterative inversion,
Geophys. J. Int., 141, 747-758, 2000.

2001

Fukao, Y., S. Widiyantoro, and M. Obayashi, Stagnant slabs in the upper and lower mantle
transition region, Rev. Geophys., 39, 3, 291-323, 2001.

Gorbatov, A., Y. Fukao, and S. Widiyantoro, Application of a three-dimensional ray-tracing
technique to global P, PP, and Pdiff travel time tomography, Geophys. J. Int., 146, 583-
593, 2001.

Gorbatov, A., Y. Fukao, S. Widiyantoro, and E. Gordeev, Seismic evidence for a mantle plume
oceanward of the Kamchatka-Aleutian trench junction, Geophys. J. Int., 146, 282-288,
2001.

Ichiki, M., M. Uyeshima, H. Utada, G. Zhao, J. Tang, and M. Ma, Upper mantle conductivity
structure of the back-arc region beneath northeastern China, Geophys. Res. Lett., 28,
3773-3776, 2001.

Iidaka, T., and F. L. Niu, Mantle and crust anisotropy in the eastern China region as inferred
from waveform splitting of SKS and PpSms, Earth Planets Space, 53, 159-168, 2001.

Iidaka, T., and F. L. Niu, Seismic anisotropy beneath the Lau back-arc basin inferred from
sScS-ScS splitting data, Geophys. Res. Lett., 28, 863-866, 2001.

Kanazawa, T., W. W. Sage, C. Escutia, and Shipboard Scientific Party, Leg 191 summary,
Proc. ODP, Init. Repts., 191, College Station TX (Ocean Drilling Program), 1-49, 2001.

Kato, M., M. Misawa, and H. Kawakatsu, Small Subsidence of the 660-km Discontinuity
Beneath Japan Probed By ScS Reverberations, Geophys. Res. Lett., 28, 447-450, 2001.

Kato, M., and H. Kawakatsu, Seismological in situ estimation of density jumps across the
transition zone discontinuities beneath Japan, Geophys. Res. Lett., 28, 2541-2544, 2001.

Kawakatsu, H., and C. R. Bina, The Great Kanto Earthquake and F. Scott Fitzgerald, EOS
(Trans. Am. Geophys. Union), 82, 577-577, 2001.

Mjelde, R., P. Digranes, M. V. Schaack, H. Shimamura, H. Shiobara, S. Kodaira, O. Naess,
N. Sorenes, and E. Vagnes, Crustal structure of the outer Voring Plateau, offshore Norway,
from ocean bottom seismic and gravity data, J. Geophys. Res., 106, 6769-6791, 2001.

Palshin, N. A., L. L. Vanyan, R. D. Medzhitov, G. I. Shapiro, M. A. Evdoshenko, H. Utada,
H. Shimizu, and Y. Tanaka, Use of the Nakohdka-Naoetsu submarine cable for studying
the temporal variability of the integral water transport in the sea of Japan, Oceanology,
41, 447-453, 2001.



Sugioka, H., Y. Fukao, T. Okamoto, and K. Kanjo, Detection of shallowest submarine seismicity
by acoustic-coupled-shear waves, J. Geophys. Res., 106, 13485-13499, 2001.

Tadokoro, K., K. Nishigami, M. Ando, N. Hirata, T. Iidaka, Y. Hashida, K.Shimazaki, S.
Ohmi, Y. Kano, M. Koizumi, S. Matsuo, and H. Wada, Seismicity changes related to a
water injection experiment in the Nojima fault zone, The Island Arc, 10, 235-243, 2001.

Uyeshima, M., H. Utada, and Y. Nishida, Network-MT method and its first results in central
and eastern Hokkaido, Geophys. J. Int., 146, 1-19, 2001.

Vinnik, L., M. Kato, and H. Kawakatsu, Search for seismic discontinuities in the lower mantle,
Geophys. J. Int., 147, 41-56, 2001.

Yamaguchi, T., M. Yamano, T. Nagao, and S. Goto, Distribution of radioactive heat production
around an active fault and in accretionary prisms of southwest Japan, Phys. Earth
Planet. Inter., 126, 269-277, 2001.

Yamano, M., and S. Goto, Long-term temperature monitoring in a borehole drilled into the
Nojima Fault, southwest Japan, Island Arc, 10, 326-335, 2001.

2002

Araya, A., T. Kunugi, Y. Fukao, I. Yamada, N. Suda, S. Maruyama, N. Mio, and S. Moriwaki,
Iodine-stabilized Nd:YAG laser applied to a long-baseline interferometer for wideband
earth strain observations interferometer for wideband earth strain observations, Rev. Sci.
Instrum., 73, 6, 2434-2439, 2002.

Fukao, Y., K. Nishida, N. Suda, K. Nawa, and N. Kobayashi, A theory of the Earthfs background
free oscillations, J. Geophys. Res., 107, ESE 11-1-ESE 11-10, 2002.

Kamimura, A., J. Kasahara, M. Shinohara, R. Hino, H. Shiobara, G. Fujie, and T. Kanazawa,
Crustal structure study at the Izu-Bonin subduction zone around 31N: implications of
serpentinized materials along the subduction plate boundary, Phys. Earth Planet. Inter.,
4112, 1-25, 2002.

Kawakatsu, H., On the realtime monitoring of the long-period seismic wavefield,, in Methods
and applications of signal processing in seismic network operations, edited by T. Takanami
and G. Kitagawa, Springer, 251-257, 2002.

Koyama, T., H. Shimizu, and H. Utada, Possible effects of lateral heterogeneity in the Dh
layer on electromagnetic variations of core origin, Phys. Earth Planet. Inter., 129, 99-116,
2002.

Mjelde, R., R. Aurvag, S. Kodaira, H. Shimamura, K. Gunnarsson, A. Nakanishi, and H.
Shiobara, Vp / Vs-ratios from the central Kolbeinsey Ridge to the Jan Mayen Basin,
North Atlantic; implications for the lithology, porosity and present-day stress field, Mar.
Geophys. Res., 23, 125-145, 2002.

Mjelde, R., T. Timenes, H. Shimamura, T. Kanazawa, H. Shiobara, S. Kodaira, and A.
Nakanishi, Acquisition, processing and analysis of densely sampled P- and S-wave OBSdata
on the mid-Norwegian Margin, NE Atlantic, Earth Planets Space, 54, 1219-1236,
2002.

Nishida, K., N. Kobayashi, and Y. Fukao, Origin of the Earthfs ground noise from 2 to 20
mHz , Geophys. Res. Lett., 29, 52-1-52-4, 2002.

Salisbury, M. H., M. Shinohara, C. Richter, and Shipboard Scientific Party, Leg 195 summary,
Proc. ODP, Init. Repts., 195, College Station TX (Ocean Drilling Program), 1-63, 2002.

Sasai, Y., M. Uyeshima, J. Zlotnicki, H. Utada, T. Kagiyama, T. Hashimoto, and Y. Takahashi,
Magnetic and electric field observations during the 2000 activity of Miyake-jima
volcano, Central Japan, Earth Planet. Sci. Lett., 203, 769-777, 2002.

Takeuchi, N., S. Watada, S. Tsuboi, Y. Fukao, M. Kobayashi, Y. Matsuzaki, and T. Nakamura,
Application of distributed object technology to seismic waveform distribution, Seism.
Res. Lett., 73, 166-172, 2002.

Yamamoto, M., H. Kawakatsu, K. Yomogida, and J. Koyama, Long-period (12sec) volcanic
tremor observed at Usu 2000 eruption: Seismological detection of a deep magma plumbing
system , Geophys. Res. Lett., 29 (9), doi:10.1029/2001GL013996, 2002.

2003

Chuillat, A., H. Shimizu, and D. E. Loper, Buoyancy-driven perturbations in a rapidly rotating,
electrically conducting fluid. Part II. Dynamo action, Geophysical and Astrophysical
Fluid Dynamics, 97, 6, 471-487, 2003.

Fukao, Y., A. To, and M. Obayashi, Whole mantle travel time tomographyusing P and PP-P
data, J. Geophys. Res., 108, ESE 8-1-ESE 8-14, 2003.

Hayashi, Y., and Y. Morita, An image of a magma intrusion process inferred from precise
hypocentral migrations of the earthquake swarm east off the Izu peninsula, Geophys. J.
Int., 153, 1, 159-174, 2003.



Loper, D. E., A. Chuillat, and H. Shimizu, Buoyancy-driven perturbations in a rapidly rotating,
electrically conducting fluid. Part I. Flow and magnetic field, Geophysical and
Astrophysical Fluid Dynamics, 97, 6, 429-469, 2003.

Nawa, K., N. Suda, S. Aoki, K. Shibuya, T. Sato, and Y. Fukao, Sea level variation in seismic
normal mode band observed with on-ice GPS and on-land SG at Syowa station, Antarctica,
Geophys. Res. Lett., 30, 55-1-55-4, 2003.

Niu, F. L., H. Kawakatsu, and Y. Fukao, A slightly dipping and strong seismic reflector at
mid-depth beneath the Maiana subduction zone, J. Geophys. Res.,108, No. B9, 2419 J.
Geophys. Res., 108, B9, 2419, doi:10.1029/2002JB002384, 2003.

Takeuchi, N., and R. J. Geller, Accurate Numerical Methods for Solving the Elastic Equation
of Motion for Arbitrary Source Locations, Geophys. J. Int., 154, 852-866, 2003.

Utada, H., Interpretation of time changes in the apparent resistivity observed prior to the
1986 eruption of Izu-Oshima volcano, Japan, J. Volcanol. Geotherm. Res., 126, 97-107,
2003.

Utada, H., T. Koyama, H. Shimizu, and A. D. Chave, A semi-global reference model for
electrical conductivity in the mid-mantle beneath the north Pacific region, Geophys. Res.
Lett., 30, 4, 1194, doi:10.1029/2002GL016092, 2003.

Yamamura, K., O. Sano, H. Utada, Y. Takei, S. Nakao, and Y. Fukao, Long-term observation
of in situ seismic velocity and attenuation, J. Geophys. Res., 108, ESE 5-1~ESE 5-15,
2003.

Yamano, M., M. Kinoshita, S. Goto, and O. Matsubayashi, Extremely high heat flow anomaly
in the middle part of the Nankai Trough, Physics and Chemistry of the Earth, 28, 487-497,
2003.

Zlotnicki, J., Y. Sasai, P. Yvetot, Y. Nishida, M. Uyeshima, F. Fauquet, H. Utada, Y. Takahashi,
G. Donnadieu, Resistivity and self-potential changes associated with volcanic activity:
The July 8, 2000 Miyake-jima eruption (Japan), Earth Planet. Sci. Lett., 205,
139-154, 2003.

2004

Araki, E., M. Shinohara, S. Sacks, A. Linde, T. Kanazawa, H. Shiobara, H. Mikada, and K.
Suyehiro, Improvement of Seismic Observation in the Ocean by Use of Seafloor Boreholes,
Bull. Seism. Soc. Am., 94, 678-690, 2004.

Fukao, Y., T. Koyama, M. Obayashi, and H. Utada, Trans-pacific temperature field in the
mantle transition region derived from seismic and electromagnetic tomography, Earth
Planet. Sci. Lett., 217, 425-434, 2004.

Ichihara, M., and M. Kameda, Propagation of acoustic waves in a visco-elastic two-phase
system: Influences of the liquid viscosity and the internal diffusion, J. Volcanol. Geotherm.
Res., 137, 1-3, 73-91, 2004.

Ichihara, M., H. Okunitani, Y. Ida, and M. Kameda, Dynamics of bubble oscillation and wave
propagation in viscoelastic liquids, J. Volcanol. Geothermal. Res., 129, 1-3, 37-60, 2004.

Isse, T., H. Shiobara, Y. Fukao, K. Mochizuki, T. Kanazawa, H. Sugioka, S. Kodaira, R.
Hino, and D. Suetsugu, Rayleigh wave phase velocity measurements across the Philippine
sea from a broad-band OBS array, Geophys. J. Int., 158, 257-266, 2004.

Marchetti, E., M. Ichihara, and M. Ripepe, Propagation of acoustic waves in a visco-elastic
two-phase system: influence of the gas bubble concentration, J. Volcanol. Geotherm. Res.,
137, 1-3, 93-108, 2004.

Matsubara, W., K. Yomogida, J. Koyama, M. Kasahara, M. Ichiyanagi, H. Kawakatsu, and
M. Yamamoto, Distibution and characteristics in waveform and spectrum of seismic events
associated with the 2000 eruption of My. Usu, J. Vol. Geothermal Res., 136, 141-158,
2004.

Obayashi, M., D. Suetsugu, and Y. Fukao, PP-P differential traveltime measurement with
crustal correction, Geophys. J. Int., 157, 1152-1162, 2004.

Oki, S., Y. Fukao, and M. Obayashi, Reference frequency of teleseismic body waves, J. Geophys.
Res., 109, B04304, doi:10.1029/2003JB002821, 2004.

Perrier, F., P. Morat, T. Yoshino, O. Sano, H. Utada, O. Gensane, and J. L. LeMouel,
Seasonal thermal signatures of heat transfer by water exchange in an underground vault,
Geophys. J. Int., 158, 372-384, 2004.

Shimizu, H., and H. Utada, The feasibility of using decadal caanges in the geoelectric field to
probe Earthfs core, Phys. Earth Planet. Inter., 142, 297-319, 2004.

Shito, A., S. Karato, and J. Park, Frequency dependence of Q in Earth fs upper mantle
inferred from continuous spectra of body waves, Geophys. Res. Lett., 31, L12603,
doi:10.1029/2004GL019582, 2004.

Takeuchi, N., and M. Kobayashi, Improvement of Seismological Earth Models by Using Data
Weighting in Waveform Inversion, Geophys. J. Int., 158, 681-694, 2004.

Tanaka, A., M. Yamano, Y. Yano, and M. Sasada, Geothermal gradient and heat flow data
in and around Japan (I): Appraisal of heat flow from geothermal gradient data, Earth
Planets Space, 56, 1191-1194, 2004.

Toh, H., Y. Hamano, M. Ichiki, and H. Utada, , EOS, 85, 467 and 473, 2004., Geomagnetic
observatory operates at the seafloor in the northwest Pacific Ocean, EOS (Trans. Am.
Geophys. Union), 85, 467, 473-467, 473, 2004.

2005

Baba, K., Electrical structure in marine tectonic settings, Surveys in Geophysics, 26, 6, 701-
731, 2005.

Baba, K., and A. D. Chave, Correction of seafloor magnetotelluric data for topographic effects
during inversion, J. Geophys. Res., 110, B12105, doi:10.1029/2004JB003463, 2005.

Cao, A., B. Romanowicz, and N. Takeuchi, An observation of PKJKP: inferences on inner
core shear properties, Science, 308, 1453-1455, 2005.
Evans, R. L., G. Hirth, K. Baba, D. Forsyth,, A. Chave, and R. Mackie, Geophysical evidence
from the MELT area for compositional controls on oceanic plates, Nature, 478, 249-252,
2005.

Goto, S., M. Yamano, and M. Kinoshita, Thermal response of sediment with vertical fluid flow
to temperature variation at the surface, J. Geophys. Res., 110, B01106, doi:10.1029/2004JB003419,
2005.

Goto, S., H. Hamamoto, and M. Yamano, Climatic and environmental changes at southeastern
coast of Lake Biwa over past 3000 years, inferred from borehole temperature data, Phys.
Earth Planet. Inter., 152, 314-325, 2005.

Hamamoto, H., M. Yamano, and S. Goto, Heat flow measurement in shallow seas through
long-term temperature monitoring, Geophys. Res. Lett., 32, L21311, doi:10.1029/2005GL024138,
2005.

Kasaya, T., T. Goto, H. Mikada, K. Baba, K. Suyehiro, and H. Utada, Resistivity image of
the Philippine Sea Plate around the 1944 Tonankai earthquake zone deduced by Marine
and Land MT surveys, Earth Planets Space, 57, 209-213, 2005.

Kuvshinov, A., H. Utada, D. Avdeev, and T. Koyama, 3-D modelling and analysis of Dst C
-responses in the North Pacific Ocean region, revisited, Geophys. J. Int., 160, 2, 505-526,
2005.

Nishida, K., Y. Fukao, S. Watada, N. Kobayashi, M. Tahira, N. Suda, K. Nawa, T. Oi, and T.
Kitajima, Array observation of background atmospheric waves in the seismic band from 1
mHz to 0.5 Hz, Geophys. J. Int., 162, 824-840, 2005.

Ramesh, D. S., H. Kawakatsu, S. Watada, and X. Yuan, Receiver function images of the
central Chugoku region in the Japanese islands using Hi-net data, Earth Planets Space,
57, 271-280, 2005.

Shimizu, H., J. P. Poirier, and J. L. Le Mouel, On crystallization at the inner core boundary,
Phys. Earth Planet. Inter., 151, 37-51, 2005.

Suetsugu, D., H. Shiobara, H. Sugioka, G. Barruol, E. Schindele, D. Reymond, A. Bonneville,
E. Debayle, T. Isse, T. Kanazawa, and Y. Fukao, Probing South Pacific Mantle Plumes
With Ocean Bottom Seismographs, EOS (Trans. Am. Geophys. Union), 86, 44, 429-435,
2005.

Takeuchi, N., Finite Boundary Perturbation Theory for the Elastic Equation of Motion,
Geophys. J. Int., 160, 1044-1058, 2005.

To, A., B. Romanowicz, Y. Capdeville, and N. Takeuchi, 3D effects of sharp boundaries at
the borders of the African and Pacific Superplumes: Observation and modeling, Earth
Planet. Sci. Lett., 233, 137-153, 2005.

Yamano, M., and S. Goto, Long-term monitoring of the temperature profile in a deep borehole:
temperature variations associated with water injection experiments and natural groundwater
discharge, Phys. Earth Planet. Inter., 152, 326-334, 2005.

Yoneda, A., and M. Ichihara, Shear viscoelasticity of ultrasonic couplers by broadband re-
flectivity measurements, Journal of Applied Physics, 97, 5, 054901, 2005.

2006

Ichihara, M., and E. E. Brodsky, A limit on the effect of rectified diffusion in volcanic systems,
Geophys. Res. Lett., 33, L02316, doi:10.1029/2005GL024753,2006.

Kawai, K., N. Takeuchi, and R. J. Geller, Complete synthetic seismograms up to 2 Hz for
transversely isotropic spherically symmetric media, Geophys. J. Int., 164, 411-424, 2006.

In press

Asari S., H. Shimizu, and H. Utada, Variability of the topographic core-mantle torque calculated
from core surface flow models, Phys. Earth Planet. Inter., in press.

Baba, K., A. D. Chave, R. L. Evans, G. Hirth, and R. L. Mackie, Mantle dynamics beneath
the East Pacific Rise at 17S: Insights from the MELT EM data, J. Geophys. Res., in press.

Ichiki, M., K. Baba, M. Obayashi, and H. Utada, Water content and geotherm in the upper
mantle above the stagnant slab: Interpretation of electrical conductivity and seismic Pwave
velocity models, Phys. Earth Planet. Inter., in press.

Kawakatsu, H., Sharp and Seismically Transparent Inner Core Boundary Region Revealed by
an Entire Network Observation of Near-vertical PKiKP, in press.

Shinohara, M., E. Araki, T. Kanazawa, K. Suyehiro, M. Mochizuki, T. Yamada, K. Nakahigashi,
Y. Kaiho, and Y. Fukao, Deep-sea borehole seismological observatories in the western
Pacific: temporal variation of seismic noise level and event detection, Annals of Geophysics,
in press.

Suetsugu, D., M. Shinohara, E. Araki, T. Kanazawa, K. Suyehiro, T. Yamada, K. Nakahigashi,
H. Shiobara, H. Sugioka, K. Kawai, and Y. Fukao, Mantle discontinuity depths
beneath the West Philippine Basin from receiver function analysis of deep-sea borehole
and seafloor broadband waveforms, Bull. Sesism. Soc. Am., in press.

Takagi, N., S. Kaneshima, H. Kawakatsu, M. Yamamoto, Y. Sudo, T. Okura, S. Yoshikawa,
T. Mori, Apparent migration of tremor source synchronized with the change in the tremor
amplitude observed at Aso volcano, Japan, J. Vol. Geothermal Res., in press.

Vanacore, E., F. Niu, H. Kawakatsu, Observations of the mid-mantle discontinuity beneath
Indonesia from S to P converted waveforms, Geophys. Res. Lett., in press.