I am interested in elucidating processes occurring inside the Earth using seismological methods. My recent major research topics include:
(1) Elucidation of the lithosphere-asthenosphere system of the oceanic mantle:
Recent advances in ocean bottom broadband seismometry,
together with advances in the seismic analysis methodology,
have brought us new opprtunities to elucidate the lithosphere-asthenosphere
system of the oceanic mantle to eventually resolve the condition neccesary to operate
plate tectonics in the Earth.
- Takeuchi, N., H. Kawakatsu, H. Shiobara, T. Isse, H. Sugioka, A. Ito, and H. Utada (2020),
Inversion of Longer-Period OBS Waveforms for P Structures in the Oceanic Lithosphere and Asthenosphere,
J. Geophys. Res., Solid Earth,
125, e2019JB018810.
https://doi.org/10.1029/2019JB018810
(pdf, SI).
-
Isse, T., H. Kawakatsu, T. Yoshizawa, A. Takeo, H. Shiobara, H. Sugioka, A. Ito, and D. Suetsugu (2019),
Surface wave tomography for the Pacific Ocean incorporating seafloor seismic observations and plate thermal evolution,
Earth Planet Science Lett., 510, 116-130.
(pdf, SI)
-
Takeo, A, H. Kawakatsu, T. Isse, K. Nishida, H. Shiobara,
H. Sugioka, A. Ito, and H. Utada (2018),
In-situ characterization of the lithosphere-asthenosphere system
beneath NW Pacific Ocean via broadband dispersion survey with
two OBS arrays, G-cubed, 19.
https://doi.org/10.1029/2018GC007588
(PDF).
-
Kawakatsu, H. and H. Utada (2017),
Seismic and Electrical Signatures of the Lithosphere-Asthenosphere System
of the Normal Oceanic Mantle,
Annual Review of Earth and Planetary Sciences,
45, 139-167,
doi: 10.1146/annurev-earth-063016-020319
(E-print).
(PDF)
-
Takeuchi, N., H. Kawakatsu, H. Shiobara, T. Isse,
H. Sugioka, A. Ito, and H. Utada (2017),
Determination of Intrinsic Attenuation in the Oceanic Lithosphere-Asthenosphere System,
Science, 358, 1593-1596, DOI: 10.1126/science.aao3508
(PDF)
-
Kawakatsu, H. (2016),
A new fifth parameter for transverse isotropy,
Geophys. Jour. Inter.,
204 682-685, doi: 10.1093/gji/ggv479.
(PDF)
-
Takeo, A., H. Kawakatsu, T. Isse, K. Nishida,
H. Sugioka, A. Ito, H. Shiobara, and D. Suetsugu (2016),
Intensity of seismic azimuthal anisotropy in the oceanic
lithosphere and as- thenosphere from broadband surface-wave
analysis of OBS array records at 60 Ma seafloor,
J. Geophys. Res., 121, 1927-1947, doi:10.1002/2015JB012429.
(PDF).
-
Kawakatsu, H., J.-P. Montagner and T.-R. A. Song (2015),
On DLA's eta,
GSA Special Paper 514: The Interdisciplinary Earth: A Volume in Honor of Don L. Anderson (edited by G. Foulger et al.), pp. 33-38.
(PDF with correction)
- Takeo, A., K. Nishida, T. Isse, H. Kawakatsu,
H. Shiobara, H. Sugioka, and T. Kanazawa (2013),
Radially anisotropic structure beneath the Shikoku Basin from broadband
surface wave analysis of ocean bottom seismometer records
J. Geophys. Res., 118, doi:10.1002/jgrb.50219.
(PDF)
-
Kumar, P., H. Kawakatsu,
M. Shinohara, Kanazawa, Araki, K. Suyehiro (2011),
P and S-receiver function analysis of seafloor borehole broadband
seismic data,
JGR,
116, B12308, doi:10.1029/2011JB008506.
(PDF)
-
Kumar, P., and H. Kawakatsu (2011),
Imaging the seismic Lithosphere-Asthenosphere Boundary of the oceanic plate,
G-cubed,
12, Q01006, 1-13.
(PDF)
-
Kawakatsu, H., P. Kumar, Y. Takei,
M. Shinohara, T. Kanazawa, E. Araki, K. Suyehiro (2009),
Seismic Evidence for Sharp Lithosphere-Asthenosphere
Boundaries of Oceanic Plates,
Science, 324, 499-502.
(PDF)
(2) Seismological study of the Earth's deep interior:
Seismology is the only tool that allows us to directly
observe processes in the deep Earth.
Subduction zone:
-
Ishise, M., H. Kawakatsu, M. Morishige, and K. Shiomi (2018),
Radial and azimuthal anisotropy tomography of the NE Japan subduction zone:
implications for the Pacific slab and mantle wedge dynamics,
Geophy. Res. Lett., 45, 3923-3931. https://doi.org/10.1029/2018GL077436.
(PDF,
SI)
- Takeuchi, N., H. Kawakatsu, S. Tanaka, M. Obayashi, Y. J. Chen.,
J. Ning, S. P Grand, F.-L. Niu, J. F Ni,
R. Iritani , K. Idehara , T. Tonegawa (2014),
Upper Mantle Tomography in the Northwestern Pacific Region Using
Triplicated P Waves, J. Geophys. Res., 119, 7667-7685,
DOI:10.1002/2014JB011161.
(PDF)
- Tang, Y., M. Obayashi, F.-L. Niu, S. P Grand, Y. J. Chen.,
H. Kawakatsu,
S. Tanaka, J. Ning, J. F Ni (2014),
Changbaishan volcanism in northeast China linked to
subduction-induced mantle upwelling,
Nature Geoscience, 7, 470-475, doi:10.1038/ngeo2166.
(online;
PDF,
SI)
-
Song, T.-R. A., and H. Kawakatsu (2013),
Subduction of oceanic asthenosphere:
A Critical Appraisal in Central Alaska,
Earth and Planetary Science Letters,
367, 82-94.
(pdf)
-
Song, T.-R. A., and H. Kawakatsu (2012),
Subduction of oceanic asthenosphere: evidence
from sub-slab seismic anisotropy,
Geophy. Res. Lett.,
39, L17301, doi:10.1029/2012GL052639.
(pdf,
supplement )
-
Kawakatsu, H., and S. Yoshioka (2011),
Metastable olivine wedge and deep dry cold slab beneath SW Japan,
EPSL,
303, 1-10.
(PDF)
-
Reynard, B., J. Nakajima, and H. Kawakatsu (2010),
Earthquakes and plastic deformation of anhydrous slab
mantle in double Wadati-Benioff zones,
Geophy. Res. Lett.,
37, L24309, doi:10.1029/2010GL045494.
(PDF)
- Kawakatsu, H., and S. Watada (2007),
Seismic evidence for deep water transportation in the mantle,
Science,
316, 1468-1471
(PDF)
(in Chinese)
- Kato, M., and H. Kawakatsu, (2001),
Seismological in situ estimation of density jumps across the transition zone
discontinuities beneath Japan
,
Geophys. Res. Let., 28, 2541-2544.
(PDF)
Deep Earth:
- Iritani, R., H. Kawakatsu, and N. Takeuchi (2019),
Sharpness of the hemispherical boundary in the inner core beneath the northern Pacific,
Earth Planet Science Lett, 527, 115796.
https://doi.org/10.1016/j.epsl.2019.115796
(pdf).
-
Long, X., H. Kawakatsu, N. Takeuchi (2018),
A sharp structural boundary in lowermost mantle beneath
Alaska detected by core phase differential travel times
for the anomalous South Sandwich Islands to Alaska Path,
Geophys. Res. Lett., 45, https://doi.org/10.1002/2017GL075685.
(PDF,
SI)
- Liu, Z., F.-L. Niu, Y. J. Chen., S. P Grand,
H. Kawakatsu, J. Ning, S. Tanaka, M. Obayashi, J. F Ni (2015),
Receiver function images of the mantle transition zone beneath NE China:
new constraints on intraplate volcanism, deep subduction and their
potential link, Earth Planet Science Lett., 412, 101-111.
(PDF)
- Tanaka, S., H. Kawakatsu, M. Obayashi, Y. J. Chen.,
J. Ning, S. P Grand, F.-L. Niu, J. F Ni (2015),
Rapid lateral variation of P-wave velocity at the base of the mantle
near the edge of the Large-Low Shear Velocity Province beneath the
Western Pacific,
Geophys. Jour. Inter., 200, 1052-1065.
(PDF)
- Iritani, R., N. Takeuchi and H. Kawakatsu (2014),
Intricate heterogeneous structure of the top 300 km of
the Earth's inner core inferred from global array data:
II. Frequency dependence of inner core attenuation and its implication,
Earth Planet Science Lett,
405, 231-243
(on line;
PDF)
- Iritani, R., N. Takeuchi and H. Kawakatsu (2014),
Intricate heterogeneous structure of the top 300 km of
the Earth's inner core inferred from global array data:
I. Regional 1D attenuation and velocity profiles,
Phys. Earth Planet. Int.,
230, 15-27.
(online;
PDF)
-
Iritani, R., N. Takeuchi and H. Kawakatsu (2010),
Seismic attenuation structure of the top half of the inner core
beneath the northeastern Pacific,
Geophy. Res. Lett.,
37, L19303, doi:10.1029/2010GL044053.
(PDF)
-
Shen, Xuzhang, Huilan Zhou, and H. Kawakatsu (2008),
Mapping the Upper Mantle Discontinuities beneath China with Teleseismic Receiver Functions
,
Earth Planets Space , 60, 713-719.
(PDF)
- Kawakatsu, H., (2006),
Sharp and seismically transparent inner core boundary region
revealed by an entire network observation of near-vertical PKiKP
,
Earth Planets Space, 58, 855-863.
(PDF; Note: Fig 9 may not print well)
(3) Realtime monitoring of the earth's activity field:
We have developed a new method to monitor Earth's
activity (earthquakes, volcanic activities, etc.) by continuously
monitoring long-period seismic wavefield, and more recently
realtime back-projection methods.
-
Wang, D., H. Kawakatsu,
J. Zhuang, J. Mori, T. Maeda, H. Tsuruoka, and X. Zhao (2017),
Automated Determination of Magnitude and Source Length of Large
Earthquakes using Back-projection and P-wave Amplitudes,
Geophys. Res. Lett., 44, 5447-5456, doi:10.1002/2017GL073801.
(PDF)
-
Wang, D., N. Takeuchi, H. Kawakatsu, and J. Mori (2016),
Estimating High Frequency Energy Radiation of Large Earthquakes
by Image Deconvolution Back-Projection,
Earth Planet Science Lett.,
449, 155-163.
(PDF)
-
Wang, D., H. Kawakatsu,
JĄ„ Mori, B. Ali, Z. Ren, and X. Shen, (2016),
Back-projection analyses from four regional arrays for
rupture over a curved dipping fault:
The Mw 7.7 September 24, 2013 Pakistan Earthquake,
J. Geophys. Res.,
J. Geophys. Res., Solid Earth, 121, 1948-1961, doi:10.1002/2015JB012168.
(PDF)
-
Lee, S.-J., W.-T. Liang, H.-W. Cheng, F.-S. Tu, K.-F. Ma,
H. Tsuruoka, H. Kawakatsu, B.-S. Huang and C.-C. Liu (2014),
Toward real-time regional earthquake simulation I:
Real-time Moment Tensor monitoring (RMT) for regional events in Taiwan,
Geophys. J. Int., doi: 10.1093/gji/ggt371.
(PDF)
- Guilhem, A., D. Dreger, H. Tsuruoka, and H. Kawakatsu (2013),
Moment tensors for rapid characterization of megathrust earthquakes:
the example of the 2011 M9 Tohoku-oki, Japan earthquake,
Geophys. J. Int., 192, 759-772.
(pdf)
- Tsuruoka, H., H. Kawakatsu, and T. Urabe (2009),
GRiD MT (Grid-based Realtime Determination of Moment Tensors)
monitoring the long-period seismic wavefield
Phys. Earth Planet. Int., Special issue:
Earthquakes in subduction zones: A multidisciplinary approach
175, 8-16.
(PDF)
-
Kawakatsu, H., J.-P. Montagner (2008),
Time-reversal seismic-source imaging and moment-tensor inversion
Geophy. J. Int., 175, 686-688.
(PDF)
- Kawakatsu, H. (1998),
On the realtime monitoring of the long-period seismic wavefield,
Bull. Earthquake Res. Inst., 73, 267-274.
(PDF)
(4) Blue Earth Seismology:
This is a symbolic name of a new field in seismology that
deals not only with the solid part of the Earth but also
with the fluid part (ocean and atmosphere).
Waves and disturbances in the fluid part of the Earth can
excite seismic waves in the solid part (and vice versa)
that we observe with seismometers (or barometers). Such 'noises' are now
used to monitor the physical condition of the
earth's crust and other parts.
-
Nishida, N., J-P. Montagner, and H. Kawakatsu, (2009),
Global Surface Wave Tomography Using Seismic Hum,
Science, 326, 112, 2009
(PDF)
-
Nishida, K, H. Kawakatsu, Y. Fukao, K. Obara (2008),
Background Love and Rayleigh waves simultaneously
generated at the Pacific Ocean floors
Geophys. Res. Lett., 35, L16307, doi:10.1029/2008GL034753.
(PDF)
- Nishida, K., H. Kawakatsu, and S. Obara (2008),
Three-dimensional crustal S-wave velocity structure
in Japan using microseismic data recorded by Hi-net tiltmeters
,
J. Geophys. Res.,
113, B10302, doi:10.1029/2007JB005395.
(PDF)
(5) Volcano seismology:
we are one of the early groups who installed broadband seismometers at volcanoes.
- Kawano, Y., T. Isse, A. Takeo, H. Kawakatsu, D. Suetsugu, H. Shiobara, H. Sugioka, A. Ito, Y. Ishihara, S. Tanaka, M. Obayashi, T. Tonegawa, and J. Yoshimitsu (2020),
Persistent Long-Period Signals Recorded by an OBS Array in the Western-Central Pacific: Activity of Ambrym Volcano in Vanuatu,
Geophy. Res. Lett.,
47, e2020GL089108.
https://doi.org/10.1029/2020GL089108
(pdf, SI).
- Kawakatsu, H., and M. Yamamoto (2015),
Volcano Seismology (2nd ed.),
Schubert, G. (ed.) Treatise on Geophysics, 2nd edition, Volume 4 389-419, Oxford: Elsevier.
(PDF)
-
Yamamoto, M., and H. Kawakatsu (2008),
An efficient method to compute the dynamic response
of a fluid-filled crack
,
Geophys. J. Int., 174, 1174-1186.
(PDF)
- Kawakatsu, H., and M. Yamamoto (2007),
Volcano Seismology
,
Schubert, G. (ed.) Treatise on Geophysics, Volume 4 pp389-420, Oxford: Elsevier.
(Acknowledgements), (PDF)
- Yamamoto, M., H. Kawakatsu, K. Yomogida, J. Koyama (2002)
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.
(PDF)
- Kawakatsu, H., S. Kaneshima, H. Matsubayashi, T. Ohminato,
Y. Sudo, T. Tutui, K. Uhira, H. Yamasato, H. Ito, D. Legrand (2000),
Aso-94: Aso seismic observation with broadband instruments,
J. Vol. Geothermal Res., 101, 129-154.
(PDF)
- Legrand, D., S. Kaneshima, and H. Kawakatsu, (2000),
Moment tensor analysis of near field broadband waveforms observed
at Aso volcano, Japan,
J. Vol. Geothermal Res. , 101, 155-169.
(PDF)
- Yamamoto, M, H. Kawakatsu, S. Kaneshima,
T. Mori, T. Tutui, Y. Sudo, Y. Morita (1999),
Detection of a crack-like conduit beneath active crater at Aso volcano, Japan,
Geophys. Res. Lett., 26, 3677-3680.
(PDF)
- Kaneshima, S., H. Kawakatsu, H. Matsubayashi, Y. Sudo, T. Tutui, T. Ohminato,
H. Ito, K. Uhira, H. Yamasato, J. Oikawa, M. Takeo, T. Iidaka (1996),
Mechanism of Phreatic Eruptions at Aso Volcano Inferred from
Near-Field Broadband Seismic Observations,
Science, 273. 642-645.
(PDF)