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  1. Full paper

    Theory, modeling, and integrated studies in the Arase (ERG) project

    Understanding of underlying mechanisms of drastic variations of the near-Earth space (geospace) is one of the current focuses of the magnetospheric physics. The science target of the geospace research project ...

    Kanako Seki, Yoshizumi Miyoshi, Yusuke Ebihara, Yuto Katoh, Takanobu Amano, Shinji Saito, Masafumi Shoji, Aoi Nakamizo, Kunihiro Keika, Tomoaki Hori, Shin’ya Nakano, Shigeto Watanabe, Kei Kamiya, Naoko Takahashi, Yoshiharu Omura, Masahito Nose…

    Earth, Planets and Space 2018 70:17

    Published on: 1 February 2018

  2. Express Letter

    Triggering processes of microseismic events associated with water injection in Okuaizu Geothermal Field, Japan

    A continuous water injection test was conducted to halt the reduction in steam production in the Okuaizu Geothermal Field, Japan. Understanding the factors triggering microseismicity associated with water inje...

    Kyosuke Okamoto, Li Yi, Hiroshi Asanuma, Takashi Okabe, Yasuyuki Abe and Masatoshi Tsuzuki

    Earth, Planets and Space 2018 70:15

    Published on: 1 February 2018

  3. Full paper

    Mean winds at the cloud top of Venus obtained from two-wavelength UV imaging by Akatsuki

    Venus is covered with thick clouds. Ultraviolet (UV) images at 0.3–0.4 microns show detailed cloud features at the cloud-top level at about 70 km, which are created by an unknown UV-absorbing substance. Images...

    Takeshi Horinouchi, Toru Kouyama, Yeon Joo Lee, Shin-ya Murakami, Kazunori Ogohara, Masahiro Takagi, Takeshi Imamura, Kensuke Nakajima, Javier Peralta, Atsushi Yamazaki, Manabu Yamada and Shigeto Watanabe

    Earth, Planets and Space 2018 70:10

    Published on: 15 January 2018

  4. Full paper

    Do ocean tidal signals influence recovery of solar quiet variations?

    The solar quiet (Sq) source morphology changes on a daily basis and becomes disturbed during periods of increased magnetic activity. Therefore, it may be preferable to use single-day magnetic field recordings ...

    Martina Guzavina, Alexander Grayver and Alexey Kuvshinov

    Earth, Planets and Space 2018 70:5

    Published on: 11 January 2018

  5. Full paper

    Initial products of Akatsuki 1-μm camera

    The status and initial products of the 1-μm camera onboard the Akatsuki mission to Venus are presented. After the successful retrial of Venus’ orbit insertion on Dec. 2015 (5 years after the failure in Dec. 20...

    Naomoto Iwagami, Takeshi Sakanoi, George L. Hashimoto, Kenta Sawai, Shoko Ohtsuki, Seiko Takagi, Kazunori Uemizu, Munetaka Ueno, Shingo Kameda, Shin-ya Murakami, Masato Nakamura, Nobuaki Ishii, Takumi Abe, Takehiko Satoh, Takeshi Imamura, Chikako Hirose…

    Earth, Planets and Space 2018 70:6

    Published on: 11 January 2018

  6. Full paper

    Monitoring hydraulic stimulation using telluric sounding

    The telluric sounding (TS) method is introduced as a potential tool for monitoring hydraulic fracturing at depth. The advantage of this technique is that it requires only the measurement of electric fields, wh...

    Nigel Rees, Graham Heinson and Dennis Conway

    Earth, Planets and Space 2018 70:7

    Published on: 11 January 2018

  7. Full paper

    Software-type Wave–Particle Interaction Analyzer on board the Arase satellite

    We describe the principles of the Wave–Particle Interaction Analyzer (WPIA) and the implementation of the Software-type WPIA (S-WPIA) on the Arase satellite. The WPIA is a new type of instrument for the direct...

    Yuto Katoh, Hirotsugu Kojima, Mitsuru Hikishima, Takeshi Takashima, Kazushi Asamura, Yoshizumi Miyoshi, Yoshiya Kasahara, Satoshi Kasahara, Takefumi Mitani, Nana Higashio, Ayako Matsuoka, Mitsunori Ozaki, Satoshi Yagitani, Shoichiro Yokota, Shoya Matsuda, Masahiro Kitahara…

    Earth, Planets and Space 2018 70:4

    Published on: 8 January 2018

  8. Express Letter

    Autonomous spectrographic system to analyse the main elements of fireballs and meteors

    We present a meteor observation system based on imaging CCD cameras, wide-field optics and a diffraction grating. This system is composed of two independent spectrographs with different configurations, which a...

    Francisco Ángel Espartero, Germán Martínez, Marta Frías, Francisco Simón Montes Moya and Alberto Javier Castro-Tirado

    Earth, Planets and Space 2018 70:2

    Published on: 3 January 2018

  9. Full paper

    Difference of horizontal-to-vertical spectral ratios of observed earthquakes and microtremors and its application to S-wave velocity inversion based on the diffuse field concept

    We have been discussing the validity of using the horizontal-to-vertical spectral ratios (HVRs) as a substitute for S-wave amplifications after Nakamura first proposed the idea in 1989. So far a formula for HV...

    Hiroshi Kawase, Yuta Mori and Fumiaki Nagashima

    Earth, Planets and Space 2018 70:1

    Published on: 2 January 2018

  10. Full paper

    Midlatitude sporadic-E episodes viewed by L-band split-spectrum InSAR

    Sporadic-E (Es) is a layer of ionization that irregularly appears within the E region of the ionosphere and is known to generate an unusual propagation of very high frequency waves over long distances. The det...

    Masato Furuya, Takato Suzuki, Jun Maeda and Kosuke Heki

    Earth, Planets and Space 2017 69:175

    Published on: 29 December 2017

  11. Full paper

    Wire Probe Antenna (WPT) and Electric Field Detector (EFD) of Plasma Wave Experiment (PWE) aboard the Arase satellite: specifications and initial evaluation results

    This paper summarizes the specifications and initial evaluation results of Wire Probe Antenna (WPT) and Electric Field Detector (EFD), the key components for the electric field measurement of the Plasma Wave E...

    Yasumasa Kasaba, Keigo Ishisaka, Yoshiya Kasahara, Tomohiko Imachi, Satoshi Yagitani, Hirotsugu Kojima, Shoya Matsuda, Masafumi Shoji, Satoshi Kurita, Tomoaki Hori, Atsuki Shinbori, Mariko Teramoto, Yoshizumi Miyoshi, Tomoko Nakagawa, Naoko Takahashi, Yukitoshi Nishimura…

    Earth, Planets and Space 2017 69:174

    Published on: 27 December 2017

  12. Full paper

    Measuring seismicity diversity and anomalies using point process models: case studies before and after the 2016 Kumamoto earthquakes in Kyushu, Japan

    This paper reviews seismic activity in and around the Kumamoto region before and after the April 16, 2016, Kumamoto earthquake of M7.3 using statistical models such as stationary, two-stage, and non-stationary...

    Takao Kumazawa, Yosihiko Ogata and Hiroshi Tsuruoka

    Earth, Planets and Space 2017 69:169

    Published on: 21 December 2017

  13. Full paper

    Medium-energy particle experiments–ion mass analyzer (MEP-i) onboard ERG (Arase)

    The medium-energy particle experiments–ion mass analyzer (MEP-i) was developed for the exploration of energization and radiation in geospace (ERG) mission (Arase), in order to measure the three-dimensional dis...

    Shoichiro Yokota, Satoshi Kasahara, Takefumi Mitani, Kazushi Asamura, Masafumi Hirahara, Takeshi Takashima, Kazuhiro Yamamoto and Yasuko Shibano

    Earth, Planets and Space 2017 69:172

    Published on: 21 December 2017

  14. Technical report

    Visualization tool for three-dimensional plasma velocity distributions (ISEE_3D) as a plug-in for SPEDAS

    This paper introduces ISEE_3D, an interactive visualization tool for three-dimensional plasma velocity distribution functions, developed by the Institute for Space-Earth Environmental Research, Nagoya Universi...

    Kunihiro Keika, Yoshizumi Miyoshi, Shinobu Machida, Akimasa Ieda, Kanako Seki, Tomoaki Hori, Yukinaga Miyashita, Masafumi Shoji, Iku Shinohara, Vassilis Angelopoulos, Jim W. Lewis and Aaron Flores

    Earth, Planets and Space 2017 69:170

    Published on: 21 December 2017

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