Results 1 to 10 of about 922,129 (293)

Ocean-wave phenomenon around Japan due to the 2022 Tonga eruption observed by the wide and dense ocean-bottom pressure gauge networks

Earth, Planets and Space, 2022
Ocean-bottom pressure gauges of wide and dense ocean-bottom observation networks around Japan, S-net and DONET, observed ocean waves caused by the Tonga eruption that started at approximately 13:00 JST (UTC + 0900) on January 15, 2022. We scrutinized the
Hisahiko Kubo, Tatsuya Kubota, Wataru Suzuki, Shin Aoi, Osamu Sandanbata, Naotaka Chikasada, Hideki Ueda   +6 more
doaj   +1 more source

Two end-member earthquake preparations illuminated by foreshock activity on a meter-scale laboratory fault

Nature Communications, 2021
By tuning fault surface heterogeneity, the authors report earthquake preparation processes respectively driven by preslip and cascade-up on a meter-scale laboratory fault. The findings suggest that foreshock activity can be useful for predicting when and
Futoshi Yamashita, Eiichi Fukuyama, Shiqing Xu, Hironori Kawakata, Kazuo Mizoguchi, Shigeru Takizawa   +5 more
doaj   +1 more source

MOWLAS: NIED observation network for earthquake, tsunami and volcano

Earth, Planets and Space, 2020
National Research Institute for Earth Science and Disaster Resilience (NIED) integrated the land observation networks established since the 1995 Kobe earthquake with the seafloor observation networks established since the 2011 Tohoku earthquake and ...
Shin Aoi, Youichi Asano, Takashi Kunugi, Takeshi Kimura, Kenji Uehira, Narumi Takahashi, Hideki Ueda, Katsuhiko Shiomi, Takumi Matsumoto, Hiroyuki Fujiwara   +9 more
doaj   +1 more source

Estimation of source, path, and site factors of S waves recorded at the S-net sites in the Japan Trench area using the spectral inversion technique

Earth, Planets and Space, 2023
S-net is a large-scale ocean bottom (OB) network in the Japan Trench area, consisting of inline-type 150 observatories equipped with seismometers and pressure gauges.
Yadab P. Dhakal, Takashi Kunugi, Hiroaki Yamanaka, Atsushi Wakai, Shin Aoi, Azusa Nishizawa   +5 more
doaj   +1 more source

Evidence of strong long-period ground motions of engineering importance for Nankai Trough plate boundary earthquakes: comparison of ground motions of two moderate-magnitude earthquakes

Earth, Planets and Space, 2018
We analyzed strong-motion and broadband recordings of two moderate-magnitude earthquakes that occurred in the Nankai Trough. The first event was the 2004 Mw 6.5 southeast off-Kii peninsula earthquake, an aftershock event inside the Philippine Sea Plate ...
Yadab P. Dhakal, Wataru Suzuki, Takeshi Kimura, Nobuyuki Morikawa, Takashi Kunugi, Shin Aoi   +5 more
doaj   +1 more source

Estimation of the source process and forward simulation of long-period ground motion of the 2018 Hokkaido Eastern Iburi, Japan, earthquake

Earth, Planets and Space, 2020
In this study, we investigate the source rupture process of the 2018 Hokkaido Eastern Iburi earthquake in Japan (M JMA 6.7) and how the ground motion can be reproduced using available source and velocity models.
Hisahiko Kubo, Asako Iwaki, Wataru Suzuki, Shin Aoi, Haruko Sekiguchi   +4 more
doaj   +1 more source

Effects of random 3D upper crustal heterogeneity on long-period (≥ 1 s) ground-motion simulations

Earth, Planets and Space, 2018
The effects of the short-wavelength heterogeneity of the crustal structure on predicted ground motion at periods of 1 s and longer were investigated by conducting three-dimensional finite-difference simulations using a detailed realistic velocity model ...
Asako Iwaki, Takahiro Maeda, Nobuyuki Morikawa, Shunsuke Takemura, Hiroyuki Fujiwara   +4 more
doaj   +1 more source

Inclusivity in online and distance disaster education: A review of educators' views

Progress in Disaster Science, 2023
Future exemplary education should foster inclusive and respectful learning environments to meet new challenges like digital inequality and power concentration. In the new normal of education due to COVID-19, inclusive online disaster risk reduction (DRR)
Aravindi Samarakkody, Anuradha C. Senanayake, Chamindi Malalgoda, Dilanthi Amaratunga, Richard Haigh, Champika Liyanage, Mo Hamza, Artūras Kaklauskas, Rajib Shaw   +8 more
doaj   +1 more source

Moment tensor inversion of the 2016 southeast offshore Mie earthquake in the Tonankai region using a three-dimensional velocity structure model: effects of the accretionary prism and subducting oceanic plate

Earth, Planets and Space, 2018
The southeast offshore Mie earthquake occurred on April 1, 2016 near the rupture area of the 1944 Tonankai earthquake, where seismicity around the interface of the Philippine Sea plate had been very low until this earthquake.
Shunsuke Takemura, Takeshi Kimura, Tatsuhiko Saito, Hisahiko Kubo, Katsuhiko Shiomi   +4 more
doaj   +1 more source

Peak ground motions and characteristics of nonlinear site response during the 2018 Mw 6.6 Hokkaido eastern Iburi earthquake

Earth, Planets and Space, 2019
The observed peak ground accelerations and peak ground velocities (PGVs) of the 2018 Mw 6.6 Hokkaido eastern Iburi earthquake generally followed the median values from ground motion prediction equations with reasonable errors at fault distances ≥ 50 km ...
Yadab P. Dhakal, Takashi Kunugi, Takeshi Kimura, Wataru Suzuki, Shin Aoi   +4 more
doaj   +1 more source