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  1. Full paper

    Low-energy particle experiments–electron analyzer (LEPe) onboard the Arase spacecraft

    In this report, we describe the low-energy electron instrument LEPe (low-energy particle experiments–electron analyzer) onboard the Arase (ERG) spacecraft. The instrument measures a three-dimensional distribut...

    Yoichi Kazama, Bo-Jhou Wang, Shiang-Yu Wang, Paul T. P. Ho, Sunny W. Y. Tam, Tzu-Fang Chang, Chih-Yu Chiang and Kazushi Asamura

    Earth, Planets and Space 2017 69:165

    Published on: 11 December 2017

  2. Full paper

    Analyzing the continuous volcanic tremors detected during the 2015 phreatic eruption of the Hakone volcano

    In the present study, we analyze the seismic signals from a continuous volcanic tremor that occurred during a small phreatic eruption of the Hakone volcano, in the Owakudani geothermal region of central Japan,...

    Yohei Yukutake, Ryou Honda, Masatake Harada, Ryosuke Doke, Tatsuhiko Saito, Tomotake Ueno, Shin’ichi Sakai and Yuichi Morita

    Earth, Planets and Space 2017 69:164

    Published on: 6 December 2017

  3. Full paper

    Application of a simplified calculation for full-wave microtremor H/V spectral ratio based on the diffuse field approximation to identify underground velocity structures

    Under the diffuse field approximation, the full-wave (FW) microtremor H/V spectral ratio (H/V) is modeled as the square root of the ratio of the sum of imaginary parts of the Green’s function of the horizontal co...

    Hao Wu, Kazuaki Masaki, Kojiro Irikura and Francisco José Sánchez-Sesma

    Earth, Planets and Space 2017 69:162

    Published on: 4 December 2017

  4. Full paper

    Ground-based instruments of the PWING project to investigate dynamics of the inner magnetosphere at subauroral latitudes as a part of the ERG-ground coordinated observation network

    The plasmas (electrons and ions) in the inner magnetosphere have wide energy ranges from electron volts to mega-electron volts (MeV). These plasmas rotate around the Earth longitudinally due to the gradient an...

    Kazuo Shiokawa, Yasuo Katoh, Yoshiyuki Hamaguchi, Yuka Yamamoto, Takumi Adachi, Mitsunori Ozaki, Shin-Ichiro Oyama, Masahito Nosé, Tsutomu Nagatsuma, Yoshimasa Tanaka, Yuichi Otsuka, Yoshizumi Miyoshi, Ryuho Kataoka, Yuki Takagi, Yuhei Takeshita, Atsuki Shinbori…

    Earth, Planets and Space 2017 69:160

    Published on: 28 November 2017

  5. Express Letter

    Continuous seismic monitoring of Nishinoshima volcano, Izu-Ogasawara, by using long-term ocean bottom seismometers

    Nishinoshima in Izu-Ogasawara started erupting in November 2013, and the island size increased. Continuous monitoring is important for study of the formation process. Since it is difficult to make continuous o...

    Masanao Shinohara, Mie Ichihara, Shin’ichi Sakai, Tomoaki Yamada, Minoru Takeo, Hiroko Sugioka, Yutaka Nagaoka, Akimichi Takagi, Taisei Morishita, Tomozo Ono and Azusa Nishizawa

    Earth, Planets and Space 2017 69:159

    Published on: 25 November 2017

  6. Express Letter

    Electrical conductivity of the global ocean

    The electrical conductivity of the ocean is a fundamental parameter in the electrodynamics of the Earth System. This parameter is involved in a number of applications ranging from the calibration of in situ oc...

    Robert H. Tyler, Tim P. Boyer, Takuto Minami, Melissa M. Zweng and James R. Reagan

    Earth, Planets and Space 2017 69:156

    Published on: 14 November 2017

  7. Frontier Letter

    Performance of Akatsuki/IR2 in Venus orbit: the first year

    The first year (December 2015 to November 2016) of IR2 after Akatsuki’s successful insertion to an elongated elliptical orbit around Venus is reported with performance evaluation and results of data acquisitio...

    Takehiko Satoh, Takao M. Sato, Masato Nakamura, Yasumasa Kasaba, Munetaka Ueno, Makoto Suzuki, George L. Hashimoto, Takeshi Horinouchi, Takeshi Imamura, Atsushi Yamazaki, Takayuki Enomoto, Yuri Sakurai, Kosuke Takami, Kenta Sawai, Takashi Nakakushi, Takumi Abe…

    Earth, Planets and Space 2017 69:154

    Published on: 3 November 2017

  8. Full paper

    Comparison of shipborne GNSS-derived precipitable water vapor with radiosonde in the western North Pacific and in the seas adjacent to Japan

    We installed two global navigation satellite system (GNSS) antennas on a research vessel, the RYOFU MARU of the Japan Meteorological Agency, and conducted experimental observations to assess the GNSS-derived ...

    Yoshinori Shoji, Kazutoshi Sato, Masanori Yabuki and Toshitaka Tsuda

    Earth, Planets and Space 2017 69:153

    Published on: 3 November 2017

  9. Full paper

    A statistical analysis of Pc1–2 waves at a near-cusp station in Antarctica

    A statistical study of Pc1–2 waves at southern polar latitudes is presented. Ultra-low frequency geomagnetic field measurements collected at the Italian station Mario Zucchelli (Terra Nova Bay, Antarctica, alt...

    M. Regi, M. Marzocchetti, P. Francia and M. De Lauretis

    Earth, Planets and Space 2017 69:152

    Published on: 3 November 2017

  10. Full paper

    Investigation of the fluid flow dynamic parameters for Newtonian and non-Newtonian materials: an approach to understanding the fluid flow-like structures within fault zones

    To understand the fault zone fluid flow-like structure, namely the ductile deformation structure, often observed in the geological field (e.g., Ramsay and Huber The techniques of modern structure geology, vol....

    H. Tanaka, Y. Shiomi and K.-F. Ma

    Earth, Planets and Space 2017 69:151

    Published on: 2 November 2017

  11. Full paper

    3-D dynamic rupture simulations of the 2016 Kumamoto, Japan, earthquake

    Using 3-D dynamic rupture simulations, we investigated the 2016 Mw7.1 Kumamoto, Japan, earthquake to elucidate why and how the rupture of the main shock propagated successfully, assuming a complicated fault geome...

    Yumi Urata, Keisuke Yoshida, Eiichi Fukuyama and Hisahiko Kubo

    Earth, Planets and Space 2017 69:150

    Published on: 1 November 2017

  12. Correction

    Correction to: Geomagnetically conjugate observations of ionospheric and thermospheric variations accompanied by a midnight brightness wave at low latitudes

    After publication of this work (Fukushima et al. 2017) some errors were noticed. In Figures 2b, 2c and 2f the letters ‘N’, ‘N’ and ‘S’ appear in the images, respectively. The original article was corrected. The p...

    D. Fukushima, K. Shiokawa, Y. Otsuka, M. Kubota, T. Yokoyama, M. Nishioka, S. Komonjinda and C. Y. Yatini

    Earth, Planets and Space 2017 69:149

    Published on: 1 November 2017

    The original article was published in Earth, Planets and Space 2017 69:112

  13. Correction

    Correction to: Distribution of water-group ion cyclotron waves in Saturn’s magnetosphere

    After publication of this work (Chou and Cheng 2017), an error was noticed. In the Acknowledgements section, the wrong institution name was given as ‘the National Science Council of Taiwan’. However, the correct ...

    Marty Chou and Chio Zong Cheng

    Earth, Planets and Space 2017 69:148

    Published on: 31 October 2017

    The original article was published in Earth, Planets and Space 2017 69:122

  14. Full paper

    Dynamics of a fault model with two mechanically different regions

    We consider a fault containing two regions with different mechanical behaviours: a strong, velocity-weakening region (asperity) and a weak, velocity-strengthening region. The fault is embedded in a shear zone ...

    Michele Dragoni and Emanuele Lorenzano

    Earth, Planets and Space 2017 69:145

    Published on: 23 October 2017

  15. Full paper

    Which is heterogeneous, stress or strength? An estimation from high-density seismic observations

    Using data from high-density seismic observation networks installed in the western Nagano Prefecture region in Japan, we precisely determined focal mechanisms and estimated the high-resolution stress field at ...

    Yoshihisa Iio, Itaru Yoneda, Masayo Sawada, Tsutomu Miura, Hiroshi Katao, Yoichiro Takada, Kentaro Omura and Shigeki Horiuchi

    Earth, Planets and Space 2017 69:144

    Published on: 20 October 2017

  16. Correction

    Correction to: Magnitude–frequency distribution of volcanic explosion earthquakes

    Magnitude–frequency distributions of volcanic explosion earthquakes that are associated with occurrences of vulcanian and strombolian eruptions, or gas burst activity, are examined at six active volcanoes. The...

    Takeshi Nishimura, Masato Iguchi, Mohammad Hendrasto, Hiroshi Aoyama, Taishi Yamada, Maurizio Ripepe and Riccardo Genco

    Earth, Planets and Space 2017 69:143

    Published on: 20 October 2017

    The original article was published in Earth, Planets and Space 2016 68:125

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