H. Kumagai

发表

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

Hiroyuki Kumagai, Masaru Nakano, Bernard A. Chouet, 2003 .

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

Hiroyuki Kumagai, Mineo Kumazawa, Masaru Nakano, 1998 .

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

H. Kumagai, 1996 .

Recent Advances in Quantification of the Sources of Volcano-seismic Signals

M. Nakano, H. Kumagai, 2009 .

On volume-source representations based on the representation theorem

H. Kumagai, N. Kame, M. Ichihara, 2016, Earth, Planets and Space.

Seismic moment and volume change of a spherical source

H. Kumagai, N. Kame, M. Ichihara, 2014, Earth, Planets and Space.

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

H. Tsuji, J. Oikawa, M. Takeo, 2006 .

Very low frequency earthquakes along the Ryukyu subduction zone

Cheng‐Horng Lin, H. Kumagai, Y. Yamanaka, 2012 .

Post-Seismic Crustal Deformation Associated with the 1995 Hyogo-ken Nanbu Earthquake Derived from GPS Observation--Preliminary Analysis of Trimble Data (The 1995 Hyogo-ken Nanbu Earthquake(Part 1))

T. Iwabuchi, T. Matsushima, T. Kato, 1996 .

A phreatic explosion model inferred from a very long period seismic event at Mayon Volcano, Philippines

T. Ohkura, H. Kumagai, Yuta Maeda, 2014 .

Waveform inversion of volcano‐seismic signals assuming possible source geometries

M. Nakano, H. Kumagai, 2005 .

Magmatic Dike Resonances Inferred from Very-Long-Period Seismic Signals

K. Obara, H. Negishi, H. Kumagai, 2003, Science.

Preliminary Analysis of Trimble Data

T. Matsushima, T. Kato, K. Hirahara, 1996 .

Structure of the D″ layer inferred from the Earth's free oscillations

N. Kobayashi, Y. Fukao, H. Kumagai, 1992 .

High‐frequency source radiation during the 2011 Tohoku‐Oki earthquake, Japan, inferred from KiK‐net strong‐motion seismograms

S. Aoi, E. Fukuyama, H. Kumagai, 2012 .

Tsunami Deposits of Large Earthquakes along the Nankai Trough : Investigation around Hamana Lake in central Japan

H. Kumagai, 1999 .

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

B. Chouet, M. Nakano, H. Kumagai, 2002 .

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

B. Chouet, P. Dawson, H. Kumagai, 2005 .

Performance of Broadband Seismic Network of the Philippines

Ishmael C. Narag, J. Bonita, H. Kumagai, 2015 .

Regional Moment Tensor Analysis in the Philippines: CMT Solutions in 2012–2013

J. Bonita, M. Nakano, H. Kumagai, 2015 .

Development and Operation of a Regional Moment Tensor Analysis System in the Philippines: Contributions to the Understanding of Recent Damaging Earthquakes

Ishmael C. Narag, R. Solidum, J. Bonita, 2015 .

Effects of water domains on seismic wavefields: A simulation case study at Taal volcano, Philippines

H. Kumagai, Yuta Maeda, 2013, Earth, Planets and Space.

Source Properties and Triggering Processes of Long‐Period Events Beneath Volcanoes Inferred From an Analytical Formula for Crack Resonance Frequencies

H. Kumagai, Yuta Maeda, R. Torres, 2018, Journal of Geophysical Research: Solid Earth.

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

F. Kimata, K. Obara, Y. Ito, 2009 .

An analytical formula for the longitudinal resonance frequencies of a fluid‐filled crack

H. Kumagai, Yuta Maeda, 2013 .

An approach to source characterization of tremor signals associated with eruptions and lahars

M. Ruiz, P. Mothes, H. Kumagai, 2015, Earth, Planets and Space.

A generalized equation for the resonance frequencies of a fluid-filled crack

H. Kumagai, Yuta Maeda, 2017 .

Acoustic properties of a crack containing magmatic or hydrothermal fluids

Hiroyuki Kumagai, Bernard A. Chouet, B. Chouet, 2000 .

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

I. Molina, J. Pennec, M. Hall, 2004 .

Enhancing volcano-monitoring capabilities in Ecuador

P. Mothes, I. Molina, P. Palacios, 2007 .

Repeating Earthquakes Along the Colombian Subduction Zone

H. Kumagai, Juan Carlos Bermudez-Barrios, 2019 .

Representation Theorem and Green’s Function (2): —Moment Tensor Representation of Volume Sources—@@@——体積震源のモーメントテンソル表現——

H. Kumagai, N. Kame, M. Ichihara, 2016 .

Topographic Degradation Processes of Lunar Crater Walls Inferred From Boulder Falls

T. Morota, H. Kumagai, Ayame Ikeda, 2022, Journal of Geophysical Research: Planets.

Strong localized asperity of the 2011 Tohoku-Oki earthquake, Japan

S. Aoi, E. Fukuyama, H. Kumagai, 2012, Earth, Planets and Space.

A self‐organized model of earthquakes with constant stress drops and the b‐value of 1

Sei‐ichiro Watanabe, Y. Fukao, H. Kumagai, 1999 .

Elasticity measurements on the material analogous to iron in the inner core of the Earth by FT‐ultrasonic spectroscopy

I. Ohno, Y. Syono, Y. Inouye, 2008 .

Growth-ring analysis of Early Tertiary conifer woods from the Canadian High Arctic and its paleoclimatic interpretation

T. Sweda, J. Basinger, H. Kumagai, 1995 .

Seismic tracking of lahars using tremor signals

P. Palacios, T. Maeda, M. Nakano, 2009 .

Tomographic inversion of P-wave velocity and Q structures beneath the Kirishima volcanic complex, southern Japan, based on finite difference calculations of complex traveltimes

P. Dawson, H. Kumagai, Toshitaka Tomatsu, 2001 .

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

J. Oikawa, T. Ohminato, M. Nakano, 2001, Science.

Depth‐dependent rupture mode along the Ecuador‐Colombia subduction zone

Hiroyuki Kumagai, Wilson Ivan Guachamin Acero, Mario Ruiz, 2017 .

ASSESSING POTENTIAL TSUNAMI HAZARDS IN COLOMBIA

E. Mas, B. Adriano, H. Kumagai, 2016 .

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

M. Nakano, H. Kumagai, H. Inoue, 2008 .

Dynamic landslide processes revealed by broadband seismic records

Hiroyuki Kumagai, Masumi Yamada, Takanori Matsuzawa, 2013 .

Characterization of scattered seismic wavefields simulated in heterogeneous media with topography

Tatsuhiko Saito, H. Kumagai, T. Yamashina, 2010 .

4D seismic tomography of Nevado del Ruiz Volcano, Colombia, 2000–2016

J. Londoño, H. Kumagai, 2018, Journal of Volcanology and Geothermal Research.

Source models of long-period seismic events at Galeras volcano, Colombia

H. Kumagai, R. Torres, K. Taguchi, 2021, Geophysical Journal International.

Source process of very-long-period events accompanying long-period signals at Cotopaxi Volcano, Ecuador

Hiroyuki Kumagai, Alexander Garcia-Aristizabal, Masaru Nakano, 2008 .

Scattering and Attenuation Characteristics at Volcanoes Inferred From Envelope Widths of Natural and Active Seismic Sources

H. Kumagai, Yuta Maeda, R. Torres, 2020, Journal of Geophysical Research: Solid Earth.

Waveform inversion of volcano-seismic signals for an extended source

B. Chouet, M. Nakano, H. Kumagai, 2007 .

Envelope Widths of Volcano‐Seismic Events and Seismic Scattering Characteristics Beneath Volcanoes

J. Londoño, H. Kumagai, Yuta Maeda, 2018, Journal of Geophysical Research: Solid Earth.

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

Hiroyuki Kumagai, Masaru Nakano, Bernard A. Chouet, 2001 .

Source model of an earthquake doublet that occurred in a pull-apart basin along the Sumatran fault, Indonesia

Sunarjo, S. Toda, R. Ando, 2010 .

Reconstruction of a Tertiary Fossil Forest from the Canadian High Arctic using Three-dimensional Computer Graphics

B. LePage, Y. Nobori, T. Sweda, 1997 .

Evidence for slow slip following a moderate‐size earthquake (Mw=5.7) in a subducting plate

N. Fujii, H. Kumagai, K. Takai, 1999 .

Seismic, petrologic, and geodetic analyses of the 1999 dome-forming eruption of Guagua Pichincha volcano, Ecuador

P. Mothes, H. Yepes, M. Monzier, 2007 .

Broadband seismic monitoring of active volcanoes using deterministic and stochastic approaches

M. Ruiz, I. Molina, P. Palacios, 2009 .

Source process of long‐period seismic events at Taal volcano, Philippines: Vapor transportation and condensation in a shallow hydrothermal fissure

H. Kumagai, Yuta Maeda, T. Yamashina, 2013 .

Centroid moment tensor catalogue for Indonesia

Sunarjo, M. Nakano, H. Kumagai, 2010 .

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

I. Molina, H. Yepes, H. Kumagai, 2003 .

Temporal evolution of the magmatic system at Nevado del Ruiz Volcano (Colombia) inferred from long-period seismic events in 2003–2020

I. Molina, C. López, H. Kumagai, 2023, Journal of Volcanology and Geothermal Research.

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

H. Kumagai, Yuta Maeda, R. Torres, 2020 .

Response of a hydrothermal system to magmatic heat inferred from temporal variations in the complex frequencies of long-period events at Kusatsu-Shirane Volcano, Japan

M. Nakano, H. Kumagai, 2005 .

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

Hiroyuki Kumagai, Bernard A. Chouet, B. Chouet, 2001 .

Near-field tsunami forecast system based on near real-time seismic moment tensor estimation in the regions of Indonesia, the Philippines, and Chile

Hiroyuki Kumagai, Nelson Pulido, Eiichi Fukuyama, 2016, Earth, Planets and Space.

Theoretical basis of the amplitude source location method for volcano‐seismic signals

T. Maeda, H. Kumagai, H. Morioka, 2017 .

Estimating plume heights of explosive eruptions using high-frequency seismic amplitudes

H. Kumagai, A. Mori, 2019, Geophysical Journal International.

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

B. Chouet, H. Kumagai, 1999 .

Temporal change of the magma plumbing system at Galeras volcano, Colombia, revealed by repeated seismic tomography in 2009–2018

J. Londoño, H. Kumagai, R. Torres, 2020 .

Detection of landslides and submarine slumps using broadband seismic networks

Hiroyuki Kumagai, Tzay-Chyn Shin, Cheng-Horng Lin, 2010 .

Source amplitudes of volcano-seismic signals determined by the amplitude source location method as a quantitative measure of event size

M. Ruiz, P. Palacios, H. Yepes, 2013 .

Source Quantification of Volcanic-Seismic Signals

H. Kumagai, 2021, Complexity in Tsunamis, Volcanoes, and their Hazards.

Temporal evolution of a magmatic dike system inferred from the complex frequencies of very long period seismic signals

H. Kumagai, 2006 .

Volcano Seismic Signals, Source Quantification of

Hiroyuki Kumagai, H. Kumagai, 2009, Encyclopedia of Complexity and Systems Science.

Ascending seismic source during an explosive eruption at Tungurahua volcano, Ecuador

M. Ruiz, H. Yepes, H. Kumagai, 2011 .

Rupture process and coseismic deformations of the 27 February 2010 Maule earthquake, Chile

Y. Yagi, H. Kumagai, N. Nishimura, 2011 .

Amplitude Source Location Method With Depth‐Dependent Scattering and Attenuation Structures: Application at Nevado del Ruiz Volcano, Colombia

J. Londoño, H. Kumagai, Yuta Maeda, 2019, Journal of Geophysical Research: Solid Earth.