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  1. Content type: Express Letter

    Tenerife has been the subject of numerous studies covering a wide range of fields. Many studies have been focused on characterising the magmatic plumbing system. Even so, a controversy still exists regarding t...

    Authors: Perla Piña-Varas, Juanjo Ledo, Pilar Queralt, Alex Marcuello and Nemesio Perez

    Citation: Earth, Planets and Space 2018 70:14

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  2. Content type: Full paper

    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...

    Authors: 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

    Citation: Earth, Planets and Space 2018 70:10

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  3. Content type: Full paper

    In the gravity sensor of a superconducting gravimeter, a superconducting sphere as a test mass is levitated in a magnetic field. Such a sensor is susceptible to applied horizontal as well as vertical accelerat...

    Authors: Yuichi Imanishi, Kazunari Nawa, Yoshiaki Tamura and Hiroshi Ikeda

    Citation: Earth, Planets and Space 2018 70:9

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  4. Content type: Full paper

    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 ...

    Authors: Martina Guzavina, Alexander Grayver and Alexey Kuvshinov

    Citation: Earth, Planets and Space 2018 70:5

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  5. Content type: Full paper

    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...

    Authors: 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…

    Citation: Earth, Planets and Space 2018 70:6

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  6. Content type: Full paper

    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...

    Authors: Nigel Rees, Graham Heinson and Dennis Conway

    Citation: Earth, Planets and Space 2018 70:7

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  7. Content type: Full paper

    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...

    Authors: 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…

    Citation: Earth, Planets and Space 2018 70:4

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  8. Content type: Full paper

    We performed two axial deformation experiments on synthetic polycrystalline anorthite samples with a grain size of ~ 3 μm and 5 vol% Si–Al-rich glass at 900 °C, a confining pressure of 1.0 GPa, and a strain ra...

    Authors: Jun-ichi Fukuda, Jun Muto and Hiroyuki Nagahama

    Citation: Earth, Planets and Space 2018 70:3

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  9. Content type: Express Letter

    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...

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

    Citation: Earth, Planets and Space 2018 70:2

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  10. Content type: Full paper

    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...

    Authors: Hiroshi Kawase, Yuta Mori and Fumiaki Nagashima

    Citation: Earth, Planets and Space 2018 70:1

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  11. Content type: Full paper

    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...

    Authors: Masato Furuya, Takato Suzuki, Jun Maeda and Kosuke Heki

    Citation: Earth, Planets and Space 2017 69:175

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  12. Content type: Full paper

    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...

    Authors: 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…

    Citation: Earth, Planets and Space 2017 69:174

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  13. Content type: Full paper

    We analyzed campaign Global Positioning System observation data in Kuchinoerabu-jima during 2006–2014. Most benchmarks located around Shin-dake crater showed crater-centered radial horizontal displacements. Ho...

    Authors: Kohei Hotta and Masato Iguchi

    Citation: Earth, Planets and Space 2017 69:173

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  14. Content type: Full paper

    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...

    Authors: Takao Kumazawa, Yosihiko Ogata and Hiroshi Tsuruoka

    Citation: Earth, Planets and Space 2017 69:169

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  15. Content type: Full paper

    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...

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

    Citation: Earth, Planets and Space 2017 69:172

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  16. Content type: Technical report

    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...

    Authors: 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

    Citation: Earth, Planets and Space 2017 69:170

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  17. Content type: Full paper

    We provide an overview of data products from observations by the Japanese Venus Climate Orbiter, Akatsuki, and describe the definition and content of each data-processing level. Levels 1 and 2 consist of non-c...

    Authors: Kazunori Ogohara, Masahiro Takagi, Shin-ya Murakami, Takeshi Horinouchi, Manabu Yamada, Toru Kouyama, George L. Hashimoto, Takeshi Imamura, Yukio Yamamoto, Hiroki Kashimura, Naru Hirata, Naoki Sato, Atsushi Yamazaki, Takehiko Satoh, Naomoto Iwagami, Makoto Taguchi…

    Citation: Earth, Planets and Space 2017 69:167

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  18. Content type: Full paper

    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...

    Authors: 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

    Citation: Earth, Planets and Space 2017 69:165

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  19. Content type: Full paper

    The Gravity Recovery and Climate Experiment (GRACE) has monitored global gravity changes since 2002. Gravity changes are considered to represent hydrological water mass movements around the surface of the glob...

    Authors: Yuta Mitsui and Kyohei Yamada

    Citation: Earth, Planets and Space 2017 69:166

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