Keisuke YOSHIDA

Previous studies related to earthquake generation processes in Japan

Noto Earthquake Sequence (2020-)

Yoshida, K. R. Takagi, Y. Fukushima, R. Ando, Y. Ohta, Y. Hiramatsu, 2024, Role of a Hidden Fault in the Early Process of the 2024 Mw7.5 Noto Peninsula Earthquake, Geophysical Research Letters, 51 (16) e2024GL110993. https://doi.org/10.1029/2024GL110993
Yoshida, K., N. Uchida, Y. Matsumoto, M. Orimo, T. Okada, S. Hirahara, S. Kimura, R. Hino, 2023, Updip Fluid Flow in the Crust of the Northeastern Noto Peninsula, Japan, Triggered the 2023 Mw6.2 Suzu Earthquake During Swarm Activity, Geophysical Research Letters, 50(21), e2023GL106023. https://doi.org/10.1029/2023GL106023
Yoshida, K., M. Uno, T. Matsuzawa, Y. Yukutake, Y. Mukuhira, H. Sato, T. Yoshida, 2023, Upward Earthquake Swarm Migration in the Northeastern Noto Peninsula, Japan, Initiated From a Deep Ring-Shaped Cluster: Possibility of Fluid Leakage From a Hidden Magma System, Journal of Geophysical Research: Solid Earth, 128(6). https://doi.org/10.1029/2022jb026047

Miyagi-Oki M~7 Interplate Earthquake Sequences

Yoshida, K., 2023, The Mw 6.0-6.8 quasi-repeating earthquakes off Miyagi, Japan, with variable moment release patterns due to a hidden adjacent slip patch, Journal of Geophysical Research: Solid Earth, 128(2), e2022JB025654. https://doi.org/10.1029/2022JB025654
Yoshida, K., T. Matsuzawa, N. Uchida, 2022, The 2021 Mw7.0 and Mw6.7 Miyagi-Oki earthquakes nucleated in a deep seismic/aseismic transition zone: Possible effects of transient instability due to the 2011 Tohoku earthquake, Journal of Geophysical Research: Solid Earth, 127(8). https://doi.org/10.1029/2022JB024887

Fluid-driven swarms triggered by the 2011 Tohoku-Oki earthquake

Yoshida, K., 2021, Studies about the Impacts of Upward Fluid Migration on the Earthquake Occurrence: Constraints from Seismicity Triggered by the 2011 Tohoku-Oki Earthquake, Zisin 2, 74, 95-116. https://doi.org/10.4294/zisin.2020-20
Yoshida, K., T. Matsuzawa, 2020, Heterogeneity in stress field in NE Japan and its implication for the fault strength and the earthquake occurrence mechanism, JOURNAL OF GEOGRAPHY (CHIGAKU ZASSHI), 129(4) 451-471, https://doi.org/10.5026/jgeography.129.451
Yoshida, K., A. Hasegawa, T. Yoshida, and T. Matsuzawa, 2019, Heterogeneities in stress and strength in Tohoku and its relationship with earthquake sequences triggered by the 2011 M9 Tohoku-Oki earthquake, Pure and Applied Geophysics,176 (3), 1335-1355, https://doi.org/10.1007/s00024-018-2073-9
Yoshida, K. and A. Hasegawa, 2018, Hypocenter Migration and Seismicity Pattern Change in the Yamagata-Fukushima Border, NE Japan, Caused by Fluid Movement and Pore Pressure Variation, J. Geophys. Res. Solid Earth, 123 (6),5000-5017. https://doi.org/10.1029/2018JB015468
Yoshida, K. and A. Hasegawa, 2018, Sendai-Okura earthquake swarm induced by the 2011 Tohoku-Oki earthquake in the stress shadow of NE Japan: Detailed fault structure and hypocenter migration, Tectonophysics , 733, 132-147. https://doi.org/10.1016/j.tecto.2017.12.031
Yoshida, K., T. Saito, Y. Urata, Y. Asano and A. Hasegawa, 2017, Temporal changes in stress drop, frictional strength, and earthquake size distribution in the 2011 Yamagata-Fukushima, NE Japan, earthquake swarm, caused by fluid migration, J. Geophys. Res. Solid Earth, 122(12), 10,379-10,397. https://doi.org/10.1002/2017JB014334
Yoshida, K., A. Hasegawa and T. Yoshida, 2016, Temporal variation of frictional strength in an earthquake swarm in NE Japan caused by fluid migration, J. Geophys. Res. Solid Earth, 121. https://doi.org/10.1002/2016JB013022.

Possible Fluid-driven mainshock-aftershock sequences

Yoshida, K., N. Uchida, S. Hiarahara, T. Nakayama, T. Matsuzawa, T. Okada, Y. Matsumoto, A. Hasegawa, 2020, 2019 M6.7 Yamagata-Oki earthquake in the stress shadow of 2011 Tohoku-Oki earthquake: Was it caused by the reduction in fault strength?, Tectonophysics. https://doi.org/10.1016/j.tecto.2020.228609
Matsumoto, Y. Yoshida, K., T. Matsuzawa, A. Hasegawa, 2021, Fault-valve behavior estimated from intensive foreshocks and aftershocks of the 2017 M 5.3 Kagoshima Bay earthquake sequence, Kyushu, southern Japan, J. Geophys. Res. Solid Earth, 126(5), e2020JB020278. https://doi.org/10.1029/2020JB020278
Yoshida, K., T. Taira, Y. Matsumoto, T. Saito, K. Emoto, T. Matsuzawa, 2020, Stress Release Process Along an Intraplate Fault Analogous to the Plate Boundary: A Case Study of the 2017 M 5.2 Akita-Daisen Earthquake, NE Japan, J. Geophys. Res. Solid Earth, 125(5), e2020JB019527. https://doi.org/10.1029/2020JB019527

2016 Kumamoto Earthquake

Urata, Y., K. Yoshida, E. Fukuyama, H. Kubo, 2017, 3-D Dynamic Rupture Simulations of the 2016 Kumamoto, Japan, Earthquake, Earth, Planets and Space, 69:150, https://doi.org/10.1186/s40623-017-0733-0.
Yoshida, K., Akira Hasegawa, Tatsuhiko Saito, Youichi Asano, Sachiko Tanaka, Kaoru Sawazaki, Yumi Urata, Eiichi Fukuyama, 2016, Stress rotations due to the M6.5 foreshck and M7.3 mainshock in the 2016 Kumamoto, SW Japan, earthquake sequence, Geophys. Res. Lett., 43, 10,097-10,104. https://doi.org/10.1002/2016GL0705812.

2008 Iwate-Miyagi Earthquake

Yoshida, K., A. Hasegawa, T. Okada, and T. Iinuma, 2014, Changes in the stress field after the 2008 M7.2 Iwate-Miyagi Nairiku earthquake in northeastern Japan, J. Geophys. Res. Solid Earth, 119(12), 9016-9030. https://doi.org/10.1002/2014JB011291.
Yoshida, K., A. Hasegawa, T. Okada, H. Takahashi, M. Kosuga, T. Iwasaki, Y. Yamanaka, H. Katao, Y. Iio, A. Kubo, T. Matsushima, H. Miyamachi, and Y. Asano, 2014, Pore pressure distribution in the focal region of the 2008 M7.2 Iwate-Miyagi Nairiku earthquake, Earth, Planets and Space, 66 59. https://doi.org/10.1186/1880-5981-66-59.

2011 Tohoku-Oki Earthquake

Hasegawa, A., K. Yoshida, T. Okada, 2011, Nearly complete stress drop in the 2011 Mw9.0 off the Pacific coast of Tohoku Earthquake, Earth Planets and Space, 63, 703-707. https://doi.org/10.5047/eps.2011.06.007.
Hasegawa, A., K. Yoshida, 2015, Preceding seismic activity and slow slip events in the source area of the 2011 Mw 9.0 Tohoku-Oki earthquake: a review, Geoscience Letters, 2. https://doi.org/10.1186/s40562-015-0025-0.

Low-Frequency Earthquakes

Yoshida, K., A. Hasegawa, S. Noguchi, K. Kasahara, 2020, Low-frequency earthquakes observed in close vicinity of repeating earthquakes in the brittle upper crust of Hakodate, Hokkaido, northern Japan, Geophysical Journal International, 793(20), 228609. https://doi.org/10.1093/gji/ggaa418

Others

Yukutake, Y., Yoshida, K., R. Honda, 2022, Interaction Between Aseismic Slip and Fluid Invasion in Earthquake Swarms Revealed by Dense Geodetic and Seismic Observations, Journal of Geophysical Research: Solid Earth , 127(4). https://doi.org/10.1029/2021jb022933
Kubota, T., H. Kubo, K. Yoshida, N. Y. Chikasada, W. Suzuki, T. Nakamura, H. Tsushima, 2021, Improving the Constraint on the Mw 7.1 2016 Off-Fukushima Shallow Normal-faulting Earthquake With the High Azimuthal Coverage Tsunami Data From the S-net Wide and Dense Network: Implication for the Stress Regime in the Tohoku Overriding Plate, Journal of Geophysical Research: Solid Earth , 126(10). https://doi.org/10.1029/2021JB022223
Maeda S., T. Matsuzawa, T. Shinji, K. Yoshida, and H. Katao, 2018 Complex microseismic activity and depth-dependent stress field changes in Wakayama, southwestern Japan, EARTH PLANETS AND SPACE, 70:21. https://doi.org/10.1186/s40623-018-0788-6
Yoshida, K., A. Hasegawa and T. Okada, 2016, Heterogeneous stress field in the source area of the 2003 M6.4 Northern Miyagi Prefecture, NE Japan, earthquake, Geophys. J. Int., 206.1, 408-419. https://doi.org/10.1093/gji/ggw160.
Yoshida, K., A. Hasegawa, and T. Okada, 2015, Spatially heterogeneous stress field in the source area of the 2011 Mw 6.6 Fukushima-Hamadori earthquake, NE Japan, probably caused by static stress change, Geophys. J. Int., 201(2), 1060-1069. https://doi.org/10.1093/gji/ggv068.
Nakajima, J., K. Yoshida, and A. Hasegawa, 2013, An intraslab seismic sequence activated by the Tohoku-oki earthquake: Evidence for fluid-related embrittlement, J. Geophys. Res-Solid Earth., 118, 3492-3505. https://doi.org/10.1002/jgrb.50246.

Updated on June 9, 2024