Measurements of underground and underwater temperatures by quartz thermometers at Syowa Station, East Antarctica by Kazuo Shibuya, Toshiyasu Nagao, Katsutada Kaminuma

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Three-dimensional topographic and gravity anomaly maps in the vicinity of Mizuho Plateau, East Antarctica by Toshiyasu Nagao, Masaru Awara, Katsutada Kaminuma

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Complexity measure in natural time analysis identifying the accumulation of stresses before major earthquakes by Panayiotis A. Varotsos, Nicholas V. Sarlis, Toshiyasu Nagao

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Study of Geo-Electric Data Collected by the Joint EMSEV-Bishkek RS-RAS Cooperation: Possible Earthquake Precursors by Konstantina Papadopoulou, Efthimios Skordas, Jacques Zlotnicki, Toshiyasu Nagao, Anatoly Rybin

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Nucleation and Cascade Features of Earthquake Mainshock Statistically Explored from Foreshock Seismicity by Masashi Kamogawa, Kazuyoshi Z. Nanjo, Jun Izutsu, Yoshiaki Orihara, Toshiyasu Nagao, Seiya Uyeda

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Development and Preliminary Analysis of a VLF-Band Electromagnetic-Wave Observation System for Short-Term Earthquake Precursory Monitoring by Toshiyasu Nagao, Masashi Kamogawa, Jun Izutsu, Tomoyuki Suzuki, Airi Saito, Shigeki Sugiura, Hitoshi Kondo

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Continued atmospheric electric field measurements following cessation of the long‐term water dropper potential equalizer at Kakioka, Japan by Masashi Kamogawa, Tomoyuki Suzuki, Yasuhiro Minamoto, Toshiyasu Nagao, Tetsuya Kodama, Hironobu Fujiwara, Takeshi Kudo

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Improving the Estimation of the Occurrence Time of an Impending Major Earthquake Using the Entropy Change of Seismicity in Natural Time Analysis by Panayiotis A. Varotsos, Nicholas V. Sarlis, Efthimios S. Skordas, Toshiyasu Nagao, Masashi Kamogawa, E. Leticia Flores-Márquez, Alejandro Ramírez-Rojas, Jennifer Perez-Oregon

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Trial of Multidisciplinary Observation at an Expandable Sub-Marine Cabled Station “Off-Hatsushima Island Observatory” in Sagami Bay, Japan by Toshiyasu Nagao, Ichiro Takahashi, Tomoki Watanabe, Hitoshi Mikada, Kenichi Asakawa, Eiichiro Araki, Ryoichi Iwase, Keizo Sayanagi, Kyohiko Mitsuzawa, Tada-nori Goto, Takafumi Kasaya

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Characteristics of the Blitzortung.org Lightning Location Catalog in Japan by Masashi Kamogawa, Tomoyuki Suzuki, Hironobu Fujiwara, Tomomi Narita, Egon Wanke, Kotaro Murata, Toshiyasu Nagao, Tetsuya Kodama, Jun Izutsu, Atsushi Matsuki, Ning Tang, Yasuhiro Minamoto

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