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  1. Atmospheric delays are known to cause biases in Global Navigation Satellite System Reflectometry (GNSS-R) altimetry applications, such as for sea-level monitoring. The main quantity of interest is the reflecti...

    Authors: Thalia Nikolaidou, Marcelo Santos, Simon D. P. Williams and Felipe Geremia-Nievinski

    Citation: Earth, Planets and Space 2020 72:91

    Content type: Full paper

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  2. Deep low-frequency tremors and short-term slow slip events (SSEs) are known to occur along the Nankai Trough in Japan. Although short-term SSEs are thought to occur repeatedly in the northern part of Ise Bay, ...

    Authors: Yuichi Kitagawa, Norio Matsumoto and Takeshi Kimura

    Citation: Earth, Planets and Space 2020 72:90

    Content type: Full paper

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  3. Marine gravimeter has been proved to be the primary technique to efficiently obtain middle-to-short wavelength signals of the earth’s gravity field in geodesy, geodynamics and marine sciences research. In rece...

    Authors: Yuan Yuan, Jinyao Gao, Zhaocai Wu, Zhongyan Shen and Guochao Wu

    Citation: Earth, Planets and Space 2020 72:89

    Content type: Technical report

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  4. We introduce a network observation of anomalous long-distance propagation of aeronautical navigation (NAV) very high-frequency (VHF) radio waves due to sporadic E layer (Es). The system has been operative sinc...

    Authors: Keisuke Hosokawa, Jun Sakai, Ichiro Tomizawa, Susumu Saito, Takuya Tsugawa, Michi Nishioka and Mamoru Ishii

    Citation: Earth, Planets and Space 2020 72:88

    Content type: Technical report

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  5. To support monitoring subtle effects in the Earth system such as a mean sea level rise of 3 mm/year, a next-generation VLBI system, the VLBI Global Observing System (VGOS), has been developed and a new VGOS st...

    Authors: Matthias Schartner, Johannes Böhm and Axel Nothnagel

    Citation: Earth, Planets and Space 2020 72:87

    Content type: Full paper

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  6. The southwestern Kuril trench is seismically active due to the subduction of the Pacific plate. Great earthquakes in this zone have frequently induced fatal disasters. Seismic monitoring and hypocenter catalog...

    Authors: Masayoshi Ichiyanagi, Valentin Mikhaylov, Dmitry Kostylev, Yuri Levin and Hiroaki Takahashi

    Citation: Earth, Planets and Space 2020 72:86

    Content type: Technical report

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  7. The precise orbit of the Hayabusa2 spacecraft with respect to asteroid Ryugu is dynamically determined using the data sets collected by the spacecraft’s onboard laser altimeter (LIght Detection And Ranging, LI...

    Authors: Keiko Yamamoto, Toshimichi Otsubo, Koji Matsumoto, Hirotomo Noda, Noriyuki Namiki, Hiroshi Takeuchi, Hitoshi Ikeda, Makoto Yoshikawa, Yukio Yamamoto, Hiroki Senshu, Takahide Mizuno, Naru Hirata, Ryuhei Yamada, Yoshiaki Ishihara, Hiroshi Araki, Shinsuke Abe…

    Citation: Earth, Planets and Space 2020 72:85

    Content type: Full paper

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  8. Obvious crustal deformation is observed during a postseismic period as well as a coseismic period associated with a large earthquake. Major mechanisms of transient postseismic deformation are known as aftersli...

    Authors: Fumiaki Tomita, Takeshi Iinuma, Yusaku Ohta, Ryota Hino, Motoyuki Kido and Naoki Uchida

    Citation: Earth, Planets and Space 2020 72:84

    Content type: Full paper

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  9. Previous studies of the major eruption at Shinmoe-dake volcano, Japan, in January 2011 suggested that gradual injection of magma from a deep source into a shallow reservoir began in December 2009 and led to th...

    Authors: Ken’ichi Yamazaki, Yusuke Yamashita and Shintaro Komatsu

    Citation: Earth, Planets and Space 2020 72:83

    Content type: Full paper

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  10. Being footprints of major magnetic storms and hence major solar eruptions, mid- to low-latitude aurorae have been one of the pathways to understand solar–terrestrial environments. However, it has been reported...

    Authors: Denny M. Oliveira, Hisashi Hayakawa, Ankush Bhaskar, Eftyhia Zesta and Geeta Vichare

    Citation: Earth, Planets and Space 2020 72:82

    Content type: Express Letter

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  11. Nevado del Ruiz Volcano (NRV) had a phreatomagmatic eruption in 1985. The eruption partially melted the volcano’s ice cap leading to floods and lahars flowing down to nearby towns, which killed at least 25,000...

    Authors: Lina Marcela Castaño, Carlos Alberto Ospina, Oscar Ernesto Cadena, Beatriz Galvis-Arenas, John Makario Londono, Carlos Andrés Laverde, Takayuki Kaneko and Mie Ichihara

    Citation: Earth, Planets and Space 2020 72:81

    Content type: Full paper

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  12. From the launch of the Ørsted satellite in 1999, through the CHAMP mission from 2000 to 2010, and now with the Swarm constellation mission starting in 2013, satellite magnetometry has provided excellent monito...

    Authors: Terence J. Sabaka, Lars Tøffner-Clausen, Nils Olsen and Christopher C. Finlay

    Citation: Earth, Planets and Space 2020 72:80

    Content type: Full paper

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  13. A sequence of eruptions in the lower East Rift Zone (LERZ) of the Kilauea, Hawaii volcano commenced in early May 2018 and caused serious damage and residential evacuation. The post-eruption drainage and collap...

    Authors: Kuan-Fu Feng, Hsin-Hua Huang and Yih-Min Wu

    Citation: Earth, Planets and Space 2020 72:74

    Content type: Full paper

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  14. To explore a local relationship between geological structures and the occurrence of very-low-frequency earthquakes (VLFEs), a particular class of slow earthquakes with characteristic periods of 10–100 s, we in...

    Authors: Kazuya Shiraishi, Yasuhiro Yamada, Masaru Nakano, Masataka Kinoshita and Gaku Kimura

    Citation: Earth, Planets and Space 2020 72:72

    Content type: Full paper

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  15. Prompt penetration electric fields were detected during the intense geomagnetic storm on 22 June, 2015 by the HF Doppler sounders at middle and low latitudes; Prague (Czech Republic), Iitate, Oarai, Onna (Japa...

    Authors: Kumiko K. Hashimoto, Takashi Kikuchi, Ichiro Tomizawa, Keisuke Hosokawa, Jaroslav Chum, Dalia Buresova, Masahito Nose and Kiyokazu Koga

    Citation: Earth, Planets and Space 2020 72:71

    Content type: Full paper

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  16. Prospective Proterozoic units in the southern Mount Isa Province are concealed by a poorly defined extent of younger basin cover, leading to poor exploration success. Collection of a magnetotelluric (MT) surve...

    Authors: Janelle M. Simpson and Graham Heinson

    Citation: Earth, Planets and Space 2020 72:69

    Content type: Full paper

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  17. Kusatsu–Shirane Volcano is an active Quaternary andesitic-to-dacitic volcano located in the Central Japan Arc. We conducted a detailed petrological investigation of orthopyroxene (opx)–magnetite (mt) symplecti...

    Authors: Kenta Ueki, Mutsuko Inui, Kenta Matsunaga, Naoya Okamoto and Kazuki Oshio

    Citation: Earth, Planets and Space 2020 72:68

    Content type: Full paper

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  18. The cloud-free, wide-swath, day-and-night observation capability of synthetic aperture radar (SAR) has an important role in rapid landslide monitoring to reduce economic and human losses. Although interferomet...

    Authors: Masato Ohki, Takahiro Abe, Takeo Tadono and Masanobu Shimada

    Citation: Earth, Planets and Space 2020 72:67

    Content type: Full paper

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  19. Determining the fault parameters of an earthquake is fundamental for studying the earthquake physics, understanding the seismotectonics of the region, and forecasting future earthquake activities in the surrou...

    Authors: Nematollah Ghayournajarkar and Yo Fukushima

    Citation: Earth, Planets and Space 2020 72:64

    Content type: Full paper

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  20. Inelastic deformation due to seismic activity is an important signal that reflects fault evolution. In particular, aftershock sequences indicate the evolution of damage in a medium that has experienced a large...

    Authors: Satoshi Matsumoto, Yoshihisa Iio, Shinichi Sakai and Aitaro Kato

    Citation: Earth, Planets and Space 2020 72:62

    Content type: Full paper

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  21. The Global Navigation Satellite System network in Japan detected transient crustal deformation along the Nankai trough, Japan, from June 2018. Time-dependent inversion analysis shows that a long-term slow slip...

    Authors: Shinzaburo Ozawa, Ryouji Kawabata, Kensuke Kokado and Hiroshi Yarai

    Citation: Earth, Planets and Space 2020 72:61

    Content type: Express Letter

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  22. We evaluated a method for retrieving vertical temperature and Doppler wind velocity profiles of the Venusian nightside mesosphere from the CO2 absorption line resolved by mid-infrared heterodyne spectroscopy. The...

    Authors: Kosuke Takami, Hiromu Nakagawa, Hideo Sagawa, Pia Krause, Isao Murata, Yasumasa Kasaba, Takeshi Kuroda, Shohei Aoki, Toru Kouyama, Theodor Kostiuk, Timothy A. Livengood and Gabriella Gilli

    Citation: Earth, Planets and Space 2020 72:60

    Content type: Full paper

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  23. A possible driver of precipitation of magnetospheric energetic electrons in the high-latitude atmosphere is represented by electromagnetic ion-cyclotron (EMIC) magnetospheric waves. The precipitating particles...

    Authors: P. Francia, M. Regi, M. De Lauretis, M. Pezzopane, C. Cesaroni, L. Spogli and T. Raita

    Citation: Earth, Planets and Space 2020 72:59

    Content type: Full paper

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  24. We report the propagation of substorm-associated magnetic fluctuations by multipoint magnetic observations from ground and space in the same meridional plane. The first Quasi-Zenith Satellite (QZS-1), which ha...

    Authors: Shun Imajo, Masahito Nosé, Mari Aida, Nana Higashio, Haruhisa Matsumoto, Koga Kiyokazu, Charles Smith, Robert J. MacDowall and Akimasa Yoshikawa

    Citation: Earth, Planets and Space 2020 72:58

    Content type: Express Letter

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  25. We investigated the magmatic–hydrothermal system of Aso Volcano, Japan, using broadband magnetotelluric (MT) data. To establish the nature of the shallow crust, a previous resistivity model based on data from ...

    Authors: Nobuo Matsushima, Mitsuru Utsugi, Shinichi Takakura, Tadashi Yamasaki, Maki Hata, Takeshi Hashimoto and Makoto Uyeshima

    Citation: Earth, Planets and Space 2020 72:57

    Content type: Full paper

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  26. Here, we introduce a low-cost airglow imaging system developed for observing plasma bubble signatures in 630.0-nm airglow emission from the F region of the ionosphere. The system is composed of a small camera,...

    Authors: Keisuke Hosokawa, Kohei Takami, Susumu Saito, Yasunobu Ogawa, Yuichi Otsuka, Kazuo Shiokawa, Chia-Hung Chen and Chien-Hung Lin

    Citation: Earth, Planets and Space 2020 72:56

    Content type: Technical report

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  27. Plate-boundary earthquakes of magnitude 8 or greater along the Suruga–Nankai Trough subduction zone have repeated at intervals of 90–150 years, but with widely varying magnitudes and rupture areas. We propose,...

    Authors: Yukinobu Okamura and Masanobu Shishikura

    Citation: Earth, Planets and Space 2020 72:55

    Content type: Full paper

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  28. The modulation of the dominant atmospheric tides (i.e. diurnal, semidiurnal and terdiurnal) in the mesosphere and lower thermosphere (MLT) is investigated using long-term meteor wind database from three Southe...

    Authors: Amitava Guharay, Paulo Prado Batista, Ricardo Arlen Buriti and Nelson Jorge Schuch

    Citation: Earth, Planets and Space 2020 72:51

    Content type: Full paper

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  29. The Ramså Basin is situated on the strandflat on the northeastern side of Andøya between Ramså and Skarstein. It is the only known Mesozoic sedimentary basin onshore Norway and therefore represents an easily a...

    Authors: Vikas Chand Baranwal, Marco Brönner, Jan-Steinar Rønning, Harald Elvebakk and Einar Dalsegg

    Citation: Earth, Planets and Space 2020 72:52

    Content type: Full paper

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  30. Using TIME3D-IGGCAS model, we simulated the east–west differences in F-region peak electron density (NmF2) in the Far East mid-latitude region near the longitudinal sectors with very clear zonal variations of ...

    Authors: Zhipeng Ren, Biqiang Zhao, Weixing Wan, Libo Liu, Xing Li and Tingting Yu

    Citation: Earth, Planets and Space 2020 72:50

    Content type: Full paper

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  31. We describe and discuss the preprocessing and calibration steps applied to the magnetic data measured by the three “platform magnetometers” on-board the CryoSat-2 satellite. The calibration is performed by com...

    Authors: Nils Olsen, Giuseppe Albini, Jerome Bouffard, Tommaso Parrinello and Lars Tøffner-Clausen

    Citation: Earth, Planets and Space 2020 72:48

    Content type: Full paper

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  32. A technique for estimating a plasma drift velocity distribution in the ionosphere is presented. This technique is based on a framework for representing a global vector field on a sphere by using a set of local...

    Authors: S. Nakano, T. Hori, K. Seki and N. Nishitani

    Citation: Earth, Planets and Space 2020 72:46

    Content type: Technical report

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  33. Magnetotelluric (MT) method is widely used for revealing deep electrical structure. However, natural MT signals are susceptible to cultural noises. In particular, the existing data-processing methods usually f...

    Authors: Guang Li, Xiaoqiong Liu, Jingtian Tang, Juzhi Deng, Shuanggui Hu, Cong Zhou, Chaojian Chen and Wenwu Tang

    Citation: Earth, Planets and Space 2020 72:45

    Content type: Full paper

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  34. Previous studies have suggested submarine landslides as sources of the tsunami that damaged coastal areas of Palu Bay after the 2018 Sulawesi earthquake. Indeed, tsunami run-up heights as high as 10 m determin...

    Authors: Kenji Nakata, Akio Katsumata and Abdul Muhari

    Citation: Earth, Planets and Space 2020 72:44

    Content type: Full paper

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  35. To clarify the relationship between earthquake occurrence and fluid, we analyzed data from a dense aftershock-observation network with 69 high-gain short-period seismographs installed immediately after the mai...

    Authors: Yoshihisa Iio, Satoshi Matsumoto, Yusuke Yamashita, Shin’ichi Sakai, Kazuhide Tomisaka, Masayo Sawada, Takashi Iidaka, Takaya Iwasaki, Megumi Kamizono, Hiroshi Katao, Aitaro Kato, Eiji Kurashimo, Yoshiko Teguri, Hiroo Tsuda and Takashi Ueno

    Citation: Earth, Planets and Space 2020 72:42

    Content type: Express Letter

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  36. We have explored tsunami current signals in maritime Automatic Identification System (AIS) data during the 2011 Tohoku, Japan, tsunami. The AIS data were investigated in detail taking into account ship motion ...

    Authors: Daisuke Inazu, Tsuyoshi Ikeya, Toshio Iseki and Takuji Waseda

    Citation: Earth, Planets and Space 2020 72:41

    Content type: Full paper

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