KO
Member Since 1991
Kazushige Obara
Earthquake Research Institute, University of Tokyo
AGU Research
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Detection of Deep Low-Frequency Tremors From Continuous Paper Records at a Station in Southwest Japan About 50 Years Ago Based on Convolutional Neural Network
AGU 2024
seismology | 10 december 2024
Hiromichi Nagao, Ryosuke Kaneko, Shin-ichi Ito, Hi...
Since deep low-frequency tremors are considered to be associated with large earthquakes that occur adjacently on the same subducting plate interface, ...
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Comparison of Continuously Recorded Seismic Wavefields in Tectonic and Volcanic Environments Based on the Network Covariance Matrix
JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH
17 december 2023
Andres Barajas, Cyril Journeau, Kazushige Obara, N...
Extended and sufficiently dense seismic networks capture spatiotemporal properties of the continuously recorded wavefields and can be used to compu...
Spatiotemporal Variations of Intermediate‐Depth Earthquakes Before and After 2011 Tohoku Earthquake Revealed by a Template Matching Catalog
GEOPHYSICAL RESEARCH LETTERS
23 november 2023
Qiushi Zhai, Zhigang Peng, Makoto Matsubara, Kazus...
We investigate spatiotemporal changes of intermediate‐depth earthquakes in the double seismic zone beneath Central and Northeastern Japan bef...
Detection of Deep Low‐Frequency Tremors From Continuous Paper Records at a Station in Southwest Japan About 50 Years Ago Based on Convolutional Neural Network
JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH
21 february 2023
Ryosuke Kaneko, Hiromichi Nagao, Shin-ichi Ito, Hi...
Since deep low‐frequency tremors are considered to be associated with large earthquakes that occur adjacently on the same subducting plate in...
Segmentation Characteristics of Tectonic Tremors in Shikoku, Japan, Using Machine Learning Approaches
MACHINE-LEARNING-BASED EARTHQUAKE MONITORING AND SEISMIC ANALYSIS VI ORAL
seismology | 16 december 2022
Kate H. Chen, Hao-Yu Chiu, Kazushige Obara
The Shikoku of the western Nankai Trough showcases the along-strike segmentation of slow earthquake behavior. Whether the spatial variation of tremor ...
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Detection of Deep Low-Frequency Tremors from Continuous Paper Records at a Station in Southwest Japan About 50 Years Ago Based on Convolutional Neural Network for Seismogram Images
MACHINE-LEARNING-BASED EARTHQUAKE MONITORING AND SEISMIC ANALYSIS VI ORAL
seismology | 16 december 2022
Hiromichi Nagao, Ryosuke Kaneko, Shin-ichi Ito, Hi...
The establishment of the High Sensitivity Seismograph Network (Hi-net) in Japan has led to the discovery of deep low-frequency tremors. Since such tre...
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Seismicity Cluster Analysis of Intermediate-depth Earthquakes in Japan using the Nearest-neighbor Method.
MECHANICAL STATE OF SUBDUCTING SLABS AND PHYSICAL MECHANISMS OF DEEP EARTHQUAKES: INTEGRATING SEISMOLOGICAL OBSERVATIONS, LABORATORY EXPERIMENTS, AND NUMERICAL SIMULATION II POSTER
seismology | 15 december 2022
Phuc Mach, Qiushi Zhai, Zhigang Peng, Makoto Matsu...
The physical mechanisms of the intermediate-depth earthquakes (IDEQs) between 70-350 km depth are still in debate. Central and Northeastern Japan is a...
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Spatiotemporal Variations of Shallow Very Low Frequency Earthquake Activity Southeast Off the Kii Peninsula, Along the Nankai Trough, Japan
JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH
24 february 2022
Shunsuke Takemura, Kazushige Obara, Katsuhiko Shio...
Cross‐correlation analysis was applied to long‐term onshore broadband records from April 2004 to March 2021 to detect and relocate shal...