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Narumi Takahashi and Kentaro Imai
The ocean floor network system for earthquakes and tsunamis is one of the effective tools for the early detection of large earthquakes on plate boundaries and the tsunamis they generate. The Dense Oceanfloor Network system for Earthquakes and Tsunamis (D...
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Kentaro Imai, Takashi Hashimoto, Yuta Mitobe, Tatsuo Masuta, Narumi Takahashi and Ryoko Obayashi
Tsunami-related fires may occur in the inundation area during a huge tsunami disaster, and woody debris produced by the tsunami can cause the fires to spread. To establish a practical method for evaluating tsunami-related fire predictions, we previously ...
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Yaobin Li, Xin Xin, Tianfu Xu, Huixing Zhu, Haibin Wang, Qiang Chen and Bo Yang
Gas hydrates are likely to become an important strategic resource with commercial development prospects. It is therefore of great significance to realize the long-term and efficient production of methane hydrate reservoirs. Previous studies have shown th...
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Akira Ijiri, Koichi Iijima, Urumu Tsunogai, Juichiro Ashi and Fumio Inagaki
Clay mineralogy is an important characteristic of mud volcano sediments. This study determined the clay mineral compositions of sediment from two submarine mud volcanoes in the Kumano forearc basin, Nankai Trough, by X-ray diffraction analysis. Similar c...
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Mari Yasuda, Toshiaki Muramoto and Rui Nouchi
In this research, a visiting class on disaster preparedness education for higher-grade elementary school students (10?11 years old) was conducted in Wakayama prefecture, which is exposed to Nankai Trough earthquakes, and in different parts of the three p...
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Khadijeh Qorbani, Bjørn Kvamme and Tatiana Kuznetsova
The ongoing search for new sources of energy has brought natural gas hydrate (NGH) reservoirs to the forefront of attention in both academia and the industry. The amount of gas reserves trapped within these reservoirs surpasses all of the conventional fo...
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Machiko Tamaki, Tetsuya Fujii and Kiyofumi Suzuki
Following the world?s first offshore production test that was conducted from a gas hydrate reservoir by a depressurization technique in 2013, the second offshore production test has been planned in the eastern Nankai Trough. In 2016, the drilling survey ...
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Yi Wang, Jing-Chun Feng, Xiao-Sen Li, Yu Zhang and Gang Li
Natural gas hydrate accumulations were confirmed in the Dongsha Area of the South China Sea by the Guangzhou Marine Geological Survey 2 (GMGS2) scientific drilling expedition in 2013. The drilling sites of GMGS2-01, -04, -05, -07, -08, -09, -11, -12, and...
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Junji Koyama, Motohiro Tsuzuki and Kiyoshi Yomogida
A distinct difference of the earthquake activity in megathrust subduction zones is pointed out, concerning seismic segmentations in the vicinity of Japan?that is, the apparent distribution of earthquake hypocenters characterized by Along-dip Double Segme...
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