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  1. All Galileo, GLONASS, QZSS, and BeiDou satellites are equipped with laser retroreflector arrays dedicated to satellite laser ranging (SLR). Using SLR data to new GNSS systems allows for estimating global geode...

    Authors: K. Sośnica, G. Bury, R. Zajdel, D. Strugarek, M. Drożdżewski and K. Kazmierski

    Citation: Earth, Planets and Space 2019 71:20

    Content type: Full paper

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  2. Substorm-associated electron injection, starting on Apr. 5, 2017, was observed by the ERG (Arase), GOES-15 and GOES-13 spacecraft. ERG successfully observed a clear and sufficient extent of manifestations of t...

    Authors: Tzu-Fang Chang, Chio-Zong Cheng, Sunny Wing-Yee Tam, Chih-Yu Chiang, Yoshizumi Miyoshi, Tomoaki Hori, Takefumi Mitani, Takeshi Takashima, Ayako Matsuoka, Mariko Teramoto and Iku Shinohara

    Citation: Earth, Planets and Space 2019 71:18

    Content type: Express Letter

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  3. Geomagnetic field variations as recorded at geomagnetic observatories are important for global electromagnetic studies. However, this data set is rarely used for studying the local electrical conductivity at d...

    Authors: Achim Morschhauser, Alexander Grayver, Alexey Kuvshinov, Friedemann Samrock and Jürgen Matzka

    Citation: Earth, Planets and Space 2019 71:17

    Content type: Express Letter

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  4. The detection and study of the rotational motion of space debris, which is affected by environmental factors, is a popular topic. However, relevant research in extremely low-orbit regions cannot be conducted d...

    Authors: Hou-Yuan Lin, Ting-Lei Zhu, Zhi-Peng Liang, Chang-Yin Zhao, Dong Wei, Wei Zhang, Xing-Wei Han, Hai-Feng Zhang, Zhi-Bin Wei, Yu-Qiang Li, Jian-Ning Xiong, Jin-Wei Zhan, Chen Zhang, Yi-Ding Ping, Qing-Li Song, Hai-Tao Zhang…

    Citation: Earth, Planets and Space 2019 71:16

    Content type: Full paper

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  5. The present contribution investigates the temporal changes in volcaniclastic sediment transport over the 2-year period after the 2014 eruption of Ontake Volcano in two small drainage basins where increased tur...

    Authors: Kyoko S. Kataoka, Takane Matsumoto, Takeshi Saito, Yoshitaka Nagahashi and Tsutomu Iyobe

    Citation: Earth, Planets and Space 2019 71:15

    Content type: Express Letter

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  6. Strombolian explosions are one of the most studied eruptive styles and are characterized by intermittent explosions. The mechanism of a Strombolian explosion is modeled as a large gas pocket (slug) migrating t...

    Authors: Kyoka Ishii, Akihiko Yokoo, Tsuneomi Kagiyama, Takahiro Ohkura, Shin Yoshikawa and Hiroyuki Inoue

    Citation: Earth, Planets and Space 2019 71:13

    Content type: Full paper

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  7. Monochromatic infrasound waves are scarcely reported volcanic infrasound signals. These waves have the potential to provide constraints on the conduit geometry of a volcano. However, to further investigate the...

    Authors: Akihiko Yokoo, Kyoka Ishii, Takahiro Ohkura and Keehoon Kim

    Citation: Earth, Planets and Space 2019 71:12

    Content type: Full paper

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  8. Transient mesospheric echo in the VHF range was detected at an altitude of 65–70 km during the auroral breakup that occurred from 2220 to 2226 UT on June 30, 2017. During this event, the footprint of the Arase...

    Authors: Ryuho Kataoka, Takanori Nishiyama, Yoshimasa Tanaka, Akira Kadokura, Herbert Akihito Uchida, Yusuke Ebihara, Mitsumu K. Ejiri, Yoshihiro Tomikawa, Masaki Tsutsumi, Kaoru Sato, Yoshizumi Miyoshi, Kazuo Shiokawa, Satoshi Kurita, Yoshiya Kasahara, Mitsunori Ozaki, Keisuke Hosokawa…

    Citation: Earth, Planets and Space 2019 71:9

    Content type: Express Letter

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  9. The impact of the El Niño Southern Oscillation (ENSO) on the Northern Hemisphere mid-winter zonal wind, temperature, and stationary planetary waves (SPWs) is evaluated using the Middle and Upper Atmosphere Mod...

    Authors: Tatiana S. Ermakova, Olga G. Aniskina, Irina A. Statnaia, Maxim A. Motsakov and Alexander I. Pogoreltsev

    Citation: Earth, Planets and Space 2019 71:8

    Content type: Express Letter

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  10. At many volcano observatories, measurements of the plume height are frequently applied. On the other hand, the recent development of the satellite measurements enables the monitoring of the SO2 mass emitted by th...

    Authors: Masaaki Morita

    Citation: Earth, Planets and Space 2019 71:7

    Content type: Express Letter

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  11. Results from the first VHF profiler research radar in Costa Rica, operating at a central radar frequency of 46.6 MHz, are presented. Emphasis has been on studies of scattering layers detected in the altitude r...

    Authors: Marcial Garbanzo-Salas and Wayne Hocking

    Citation: Earth, Planets and Space 2019 71:6

    Content type: Frontier letter

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  12. Pure magnetite experiences a first-order phase transition (the Verwey transition) near 120–125 K wherein the mineral’s symmetry changes from cubic to monoclinic. This transformation results in the formation of...

    Authors: Anna K. Lindquist, Joshua M. Feinberg, Richard J. Harrison, James C. Loudon and Andrew J. Newell

    Citation: Earth, Planets and Space 2019 71:5

    Content type: Full paper

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  13. The vertical fine structures and the time evolution of plasma irregularities in the sporadic E (Es) layer were observed via calcium ion (Ca+) density measurements using a resonance scattering lidar with a high ti...

    Authors: Mitsumu K. Ejiri, Takuji Nakamura, Takuo T. Tsuda, Takanori Nishiyama, Makoto Abo, Toru Takahashi, Katsuhiko Tsuno, Takuya D. Kawahara, Takayo Ogawa and Satoshi Wada

    Citation: Earth, Planets and Space 2019 71:3

    Content type: Full paper

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  14. We aim to obtain a modal decomposition of the internal geomagnetic field. In order to do so, we perform a principal component analysis of two virtual observatory datasets, with 4-month sampling time, from the ...

    Authors: João Domingos, Maria Alexandra Pais, Dominique Jault and Mioara Mandea

    Citation: Earth, Planets and Space 2019 71:2

    Content type: Full paper

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  15. Continuous measurements of soil CO2 flux are useful for understanding degassing processes and for monitoring volcanic activities. Recent studies at many volcanoes have revealed that soil CO2 flux variations are s...

    Authors: Masaaki Morita, Toshiya Mori, Akihiko Yokoo, Takahiro Ohkura and Yuichi Morita

    Citation: Earth, Planets and Space 2019 71:1

    Content type: Full paper

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  16. Rootless eruption is caused by lava flow entering inland water or wet sediment and forms craters and cones far from the actual vent. Since the rootless eruption can be significantly explosive, the possibility ...

    Authors: Rina Noguchi, Ai Hamada, Ayako I. Suzuki and Kei Kurita

    Citation: Earth, Planets and Space 2018 70:208

    Content type: Express Letter

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  17. Solar wind particles and ionospheric O+ ions influence the near-Earth plasma sheet and inner magnetospheric composition. We studied the behavior of H+, O+ and He+ ions (9–210 keV) for intense and moderate geomagn...

    Authors: Megha Pandya, Bhaskara Veenadhari, Masahito Nosé, Sandeep Kumar, Geoff D. Reeves and A. T. Y. Lui

    Citation: Earth, Planets and Space 2018 70:203

    Content type: Full paper

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  18. When an explosive eruption, such as a Plinian eruption, occurs, in order to estimate ash fall around the volcano and for hazard mitigation, a numerical model is often used. Simulation by a numerical model need...

    Authors: Kensuke Ishii

    Citation: Earth, Planets and Space 2018 70:202

    Content type: Express Letter

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  19. Generally, the dynamical model is used to estimate coordinates of satellite laser ranging (SLR) stations. In this paper, we put forward a kinematic method to estimate the coordinates of SLR stations by using g...

    Authors: Jinyun Guo, Youcun Wang, Yi Shen, Xin Liu, Yu Sun and Qiaoli Kong

    Citation: Earth, Planets and Space 2018 70:201

    Content type: Full paper

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  20. In order to verify the time variability of free core nutation (FCN) period, global superconducting gravimeter (SG) observations were analyzed based on synthetic test data. The gravity data series were synthesi...

    Authors: Xiaoming Cui, Heping Sun, Jianqiao Xu, Jiangcun Zhou and Xiaodong Chen

    Citation: Earth, Planets and Space 2018 70:199

    Content type: Full paper

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  21. Solar flares cause a rapid increase in ionization in the ionosphere owing to significant enhancement of ionizing solar radiation in the X-ray and extreme ultraviolet (EUV) spectral ranges. The change of electr...

    Authors: Jaroslav Chum, Jaroslav Urbář, Jan Laštovička, Miguel Angel Cabrera, Jann-Yenq Liu, Fernando Alberto Miranda Bonomi, Mariano Fagre, Jiří Fišer and Zbyšek Mošna

    Citation: Earth, Planets and Space 2018 70:198

    Content type: Full paper

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  22. Petrological observations and chemical analyses of melt inclusions in scoria were used to investigate the magma ascent and eruption processes of the 1979, 1989, and 2014 eruptions of Nakadake, Aso volcano, Jap...

    Authors: Genji Saito, Osamu Ishizuka, Yoshihiro Ishizuka, Hideo Hoshizumi and Isoji Miyagi

    Citation: Earth, Planets and Space 2018 70:197

    Content type: Full paper

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  23. Seafloor hydrothermal systems in the back-arc region of the Okinawa Trough have been viewed as a modern analogue to the Kuroko-type volcanogenic massive sulfide deposits. Detection of magnetic signatures is wi...

    Authors: Masakazu Fujii, Hiroshi Sato, Eri Togawa, Kazuhiko Shimada and Jun-ichiro Ishibashi

    Citation: Earth, Planets and Space 2018 70:196

    Content type: Full paper

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  24. The Hayabusa2 mission aims to obtain pristine samples from a near-Earth carbonaceous-type (C-type) asteroid, 162173 Ryugu, and return them to Earth. One of the scientific goals of the mission is to understand ...

    Authors: Haruna Sugahara, Yoshinori Takano, Yuzuru Karouji, Kazuya Kumagai, Toru Yada, Naohiko Ohkouchi and Masanao Abe

    Citation: Earth, Planets and Space 2018 70:194

    Content type: Technical report

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  25. A new five-wavelength photometer was developed and installed at the EISCAT Tromsø site (69.6°N, 19.2°E) in January 2017. The photometer consists of two units: an optical unit and a control unit together with a...

    Authors: Satonori Nozawa, Tetsuya Kawabata, Keisuke Hosokawa, Yasunobu Ogawa, Takuo Tsuda, Akira Mizuno, Ryoichi Fujii and Chris Hall

    Citation: Earth, Planets and Space 2018 70:193

    Content type: Technical report

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  26. In 2014, a phreatic eruption occurred at the Ontake Volcano in Central Japan causing multiple deaths and missing persons. Interferometric Synthetic Aperture Radar data showed local-scale subsidence around the ...

    Authors: Shohei Narita and Makoto Murakami

    Citation: Earth, Planets and Space 2018 70:191

    Content type: Full paper

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  27. In order to investigate the role of dikes in the volcanic evolution and the triggering mechanisms of catastrophic mass wasting volcanoes, we have sampled for a pilot study, seven dikes within the Wai’anae volc...

    Authors: Emilio Herrero-Bervera, Bernard Henry and Mário Moreira

    Citation: Earth, Planets and Space 2018 70:190

    Content type: Full paper

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  28. We analyzed strong-motion and broadband recordings of two moderate-magnitude earthquakes that occurred in the Nankai Trough. The first event was the 2004 Mw 6.5 southeast off-Kii peninsula earthquake, an after...

    Authors: Yadab P. Dhakal, Wataru Suzuki, Takeshi Kimura, Nobuyuki Morikawa, Takashi Kunugi and Shin Aoi

    Citation: Earth, Planets and Space 2018 70:189

    Content type: Full paper

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  29. The Kairei (KHF) and Yokoniwa hydrothermal fields (YHF) are hosted in mafic as well as ultramafic rocks distributed at an off-axis volcanic knoll of the Central Indian Ridge. Despite intensive investigations, ...

    Authors: Masakazu Fujii and Kyoko Okino

    Citation: Earth, Planets and Space 2018 70:188

    Content type: Full paper

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  30. After publication of this article (Kaneko et al. 2018), it is noticed there is an error in Fig. 3b; the lower 2.3-µm band image is mistakenly removed. The correct Fig. 3 is given below.

    Authors: Takayuki Kaneko, Atsushi Yasuda, Yoshito Yoshizaki, Kenji Takasaki and Yoshiaki Honda

    Citation: Earth, Planets and Space 2018 70:187

    Content type: Correction

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    The original article was published in Earth, Planets and Space 2018 70:175

  31. Chemical demagnetization is not preferred as a demagnetizing method in paleomagnetism because strong acids are cumbersome to handle and require considerable time compared to alternating field and thermal demag...

    Authors: Chisato Anai, Nobutatsu Mochizuki and Hidetoshi Shibuya

    Citation: Earth, Planets and Space 2018 70:184

    Content type: Technical report

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  32. Our investigations are based on the property that the fields of sources, whose depths are numerically equal to survey heights, are most brightly presented in the data of magnetic survey. Therefore, the magneti...

    Authors: Yury P. Tsvetkov, Konstantin V. Novikov, Andrey A. Ivanov and Oleg M. Brekhov

    Citation: Earth, Planets and Space 2018 70:183

    Content type: Full paper

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  33. Seismic swarm areas below the southeast flank of Ontake volcano, central Japan, provide an important opportunity to study interactions between seismicity, volcanic processes and crustal fluid. On June 25, 2017...

    Authors: Hiroshi Ichihara, Junna Kanehiro, Toru Mogi, Koshun Yamaoka, Noriko Tada, Edward Alan Bertrand and Mamoru Adachi

    Citation: Earth, Planets and Space 2018 70:182

    Content type: Express Letter

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  34. We successfully monitored the ground deformation of an eruption center during the 2015 phreatic eruption of Hakone volcano, Japan, using ground-based interferometric synthetic aperture radar (GB-InSAR). GB-InS...

    Authors: Senro Kuraoka, Yuichi Nakashima, Ryosuke Doke and Kazutaka Mannen

    Citation: Earth, Planets and Space 2018 70:181

    Content type: Express Letter

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  35. This work describes several important improvements made to the International Reference Ionosphere UPdate (IRI UP) method, and a careful validation of its performances under disturbed conditions. The IRI UP met...

    Authors: Alessio Pignalberi, Marco Pietrella, Michael Pezzopane and Rolando Rizzi

    Citation: Earth, Planets and Space 2018 70:180

    Content type: Full paper

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