World's Best Scientists 2026 revealed!
Hiroyuki Kumagai

Hiroyuki Kumagai

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 34 8107 7519 247 233 170 3581

Hiroyuki Kumagai publications per year

The chart shows the history of publications by Hiroyuki Kumagai between 1992 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Hiroyuki Kumagai published across 35 years, from 1992 to 2026, averaging 5.1 papers a year. Output peaked at 16 publications in 2016. 4 of the 177 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1992 to 2026. Vertical axis: number of publications, 0 to 16. Peak 16 publications in 2016. 1992: 2 publications 1993: 1 publication 1994: 0 publications 1995: 2 publications 1996: 3 publications 1997: 1 publication 1998: 1 publication 1999: 4 publications 2000: 1 publication 2001: 5 publications 2002: 3 publications 2003: 4 publications 2004: 5 publications 2005: 7 publications 2006: 4 publications 2007: 5 publications 2008: 4 publications 2009: 6 publications 2010: 7 publications 2011: 6 publications 2012: 5 publications 2013: 7 publications 2014: 9 publications 2015: 11 publications 2016: 16 publications 2017: 10 publications 2018: 14 publications 2019: 10 publications 2020: 7 publications 2021: 4 publications 2022: 4 publications 2023: 1 publication 2024: 4 publications 2025: 3 publications 2026: 1 publication
1992 2026

177 publications in total across all disciplines

View publications per year as a table
Hiroyuki Kumagai: publications per year, 1992 to 2026
Year Publications
1992 2
1993 1
1994 0
1995 2
1996 3
1997 1
1998 1
1999 4
2000 1
2001 5
2002 3
2003 4
2004 5
2005 7
2006 4
2007 5
2008 4
2009 6
2010 7
2011 6
2012 5
2013 7
2014 9
2015 11
2016 16
2017 10
2018 14
2019 10
2020 7
2021 4
2022 4
2023 1
2024 4
2025 3
2026 1
Total 177
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Hiroyuki Kumagai publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Hiroyuki Kumagai sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 58 bars. Horizontal axis: publications, 38–47 to 603+. Vertical axis: number of scientists, 0 to 557. Most scientists, 557, have 128–137 publications. The last bar groups every scientist with 603 publications or more. The highlighted bar, 168–177 publications, is where this scientist sits. 38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38–47 publications 603+

This scientist: 170 publications — 49th percentile

49% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

View publications distribution as a table
Number of Earth Science scientists by publication count, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
Publications Scientists This scientist
38–47 5
48–57 33
58–67 94
68–77 161
78–87 278
88–97 376
98–107 404
108–117 484
118–127 540
128–137 557
138–147 491
148–157 495
158–167 458
168–177 490 170
178–187 414
188–197 401
198–207 333
208–217 292
218–227 290
228–237 262
238–247 243
248–257 208
258–267 185
268–277 147
278–287 128
288–297 119
298–307 120
308–317 107
318–327 93
328–337 87
338–347 64
348–357 87
358–367 60
368–377 60
378–387 34
388–397 50
398–407 44
408–417 31
418–427 39
428–437 27
438–447 36
448–457 27
458–467 29
468–477 30
478–487 19
488–497 15
498–507 18
508–517 19
518–527 16
528–537 10
538–547 11
548–557 14
558–567 11
568–577 7
578–587 14
588–597 5
598–602 4
603+ 100
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Hiroyuki Kumagai D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Hiroyuki Kumagai sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 77 bars. Horizontal axis: D-Index, 30 to 106+. Vertical axis: number of scientists, 0 to 389. Most scientists, 389, have 36 D-Index. The last bar groups every scientist with 106 D-Index or more. The highlighted bar, 34 D-Index, is where this scientist sits. 30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 34 D-Index — 15th percentile

15% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

View D-Index distribution as a table
Number of Earth Science scientists by D-index, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
D-Index Scientists This scientist
30 144
31 215
32 278
33 379
34 366 34
35 372
36 389
37 366
38 344
39 349
40 296
41 289
42 277
43 279
44 248
45 257
46 212
47 202
48 207
49 204
50 183
51 178
52 182
53 178
54 163
55 117
56 163
57 120
58 113
59 136
60 135
61 96
62 103
63 83
64 103
65 83
66 89
67 92
68 89
69 78
70 75
71 53
72 62
73 54
74 35
75 52
76 50
77 32
78 37
79 20
80 33
81 36
82 34
83 34
84 24
85 19
86 18
87 26
88 30
89 17
90 21
91 19
92 15
93 14
94 20
95 9
96 10
97 15
98 13
99 3
100 13
101 3
102 9
103 4
104 6
105 6
106+ 98
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Overview

Hiroyuki Kumagai is affiliated with Nagoya University in Japan and has contributed extensively to the field of Earth and Planetary Sciences, with a strong focus on geophysics. Their research portfolio spans related subfields, including geophysics, astronomy and astrophysics, atmospheric science, and artificial intelligence.

The scientist's work extensively covers topics such as earthquake and tectonic studies, seismic waves and analysis, earthquake detection and analysis, geological and tectonic studies in Latin America, planetary science and exploration, astro and planetary science, and high-pressure geophysics and materials.

Frequent publication venues for Kumagai include:

  • Geophysical Journal International
  • Journal of Volcanology and Geothermal Research
  • Journal of Geophysical Research Planets
  • Journal of Geophysical Research Solid Earth
  • Harvard Dataverse

The list of recent papers illustrates the diversity and range of Kumagai's research contributions:

  • Topographic Degradation Processes of Lunar Crater Walls Inferred From Boulder Falls (2022), Journal of Geophysical Research Planets
  • Empirical formula for the quality factors of crack resonances and its application to the estimation of source properties of long-period seismic events at active volcanoes (2020), Geophysical Journal International
  • Source models of long-period seismic events at Galeras volcano, Colombia (2021), Geophysical Journal International
  • Scattering and Attenuation Characteristics at Volcanoes Inferred From Envelope Widths of Natural and Active Seismic Sources (2020), Journal of Geophysical Research Solid Earth
  • Plume height, duration and volume of sustained explosive eruptions inferred from eruption tremor amplitudes (2022), Geophysical Journal International

Kumagai has collaborated frequently with several researchers, including Kimiko Taguchi, Azusa Mori, Roberto Torres, Indira Molina, and Ayame Ikeda, indicating an active participation in multi-author, interdisciplinary work.

Best Publications

  • Acoustic properties of a crack containing magmatic or hydrothermal fluids

    Hiroyuki Kumagai;Bernard A. Chouet

  • Very-Long-Period Seismic Signals and Caldera Formation at Miyake Island, Japan

    Hiroyuki Kumagai;Takao Ohminato;Masaru Nakano;Masahiro Ooi

  • The complex frequencies of long‐period seismic events as probes of fluid composition beneath volcanoes

    Hiroyuki Kumagai;Hiroyuki Kumagai;Bernard A. Chouet

  • Source mechanism of long-period events at Kusatsu–Shirane Volcano, Japan, inferred from waveform inversion of the effective excitation functions

    Masaru Nakano;Hiroyuki Kumagai;Bernard A. Chouet

  • Broadband seismic monitoring of active volcanoes using deterministic and stochastic approaches

    Hiroyuki Kumagai;Masaru Nakano;Takuto Maeda;Hugo Yepes

  • Temporal evolution of a hydrothermal system in Kusatsu-Shirane Volcano, Japan, inferred from the complex frequencies of long-period events

    Hiroyuki Kumagai;Bernard A. Chouet;Masaru Nakano

  • Dynamic landslide processes revealed by broadband seismic records

    Masumi Yamada;Hiroyuki Kumagai;Yuki Matsushi;Takanori Matsuzawa

  • Detection of landslides and submarine slumps using broadband seismic networks

    C. H. Lin;H. Kumagai;M. Ando;T. C. Shin

  • Waveform inversion of oscillatory signatures in long‐period events beneath volcanoes

    Hiroyuki Kumagai;Bernard A. Chouet;Masaru Nakano

  • Source process of a long-period event at Kilauea volcano, Hawaii

    Hiroyuki Kumagai;Bernard A. Chouet;Phillip B. Dawson

  • Waveform inversion in the frequency domain for the simultaneous determination of earthquake source mechanism and moment function

    M. Nakano;H. Kumagai;H. Inoue

  • Seismic tracking of lahars using tremor signals

    Hiroyuki Kumagai;Pablo Palacios;Takuto Maeda;Diego Barba Castillo

  • Vulcanian eruptions with dominant single force components observed during the Asama 2004 volcanic activity in Japan

    Takao Ohminato;Minoru Takeo;Hiroyuki Kumagai;Tadashi Yamashina

  • The excitation and characteristic frequency of the long-period volcanic event: An approach based on an inhomogeneous autoregressive model of a linear dynamic system

    Masaru Nakano;Hiroyuki Kumagai;Mineo Kumazawa;Koshun Yamaoka

  • The dependence of acoustic properties of a crack on the resonance mode and geometry

    Hiroyuki Kumagai;Bernard A. Chouet

  • Time sequence and the recurrence models for large earthquakes along the Nankai Trough revisited

    Hiroyuki Kumagai

  • Magmatic dike resonances inferred from very-long-period seismic signals.

    Hiroyuki Kumagai;Koji Miyakawa;Hiroaki Negishi;Hiroshi Inoue

  • Source mechanism of a very-long-period event at Mt Ontake, central Japan: Response of a hydrothermal system to magma intrusion beneath the summit

    Haruhisa Nakamichi;Hiroyuki Kumagai;Masaru Nakano;Makoto Okubo

  • Resonances of a volcanic conduit triggered by repetitive injections of an ash‐laden gas

    Indira Molina;Hiroyuki Kumagai;Hugo Yepes

  • Three-dimensional P-wave velocity structure of Tungurahua Volcano, Ecuador

    Indira Molina;Hiroyuki Kumagai;Jean-Luc Le Pennec;Jean-Luc Le Pennec;Minard Hall

  • Broadband seismic monitoring of active volcanoes using deterministic and stochastic approaches

    H. Kumagai;M. Nakano;T. Maeda;H. Yepes

Frequent Co-Authors

Hugo Yepes
Hugo Yepes National Polytechnic School
Bernard A. Chouet
Bernard A. Chouet United States Geological Survey
Mario Ruiz
Mario Ruiz National Polytechnic School
Eiichi Fukuyama
Eiichi Fukuyama Kyoto University
Takuto Maeda
Takuto Maeda Hirosaki University
Patricia Mothes
Patricia Mothes National Polytechnic School
Kazuro Hirahara
Kazuro Hirahara RIKEN Center for Advanced Intelligence Project
Phillip B. Dawson
Phillip B. Dawson United States Geological Survey
Yoshio Fukao
Yoshio Fukao Japan Agency for Marine-Earth Science and Technology
Teruyuki Kato
Teruyuki Kato University of Tokyo

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