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  1. Content type: Full paper

    The interactions of flowing electrically conductive seawater with Earth’s magnetic field generate electric currents within the oceans, as well as secondary electric currents induced in the resistive solid Eart...

    Authors: Libor Šachl, Zdeněk Martinec, Jakub Velímský, Christopher Irrgang, Johannes Petereit, Jan Saynisch, David Einšpigel and Neesha Regmi Schnepf

    Citation: Earth, Planets and Space 2019 71:58

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  2. Content type: Full paper

    The 2018 Mj 6.7 Hokkaido Eastern Iburi earthquake (Iburi earthquake) occurred near the eastern boundary fault zone of the Ishikari lowlands, which is composed of a northern and southern fault. Aftershock distribu...

    Authors: Makiko Ohtani and Kazutoshi Imanishi

    Citation: Earth, Planets and Space 2019 71:57

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  3. Content type: Full paper

    The observed peak ground accelerations and peak ground velocities (PGVs) of the 2018 Mw 6.6 Hokkaido eastern Iburi earthquake generally followed the median values from ground motion prediction equations with r...

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

    Citation: Earth, Planets and Space 2019 71:56

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  4. Content type: Full paper

    Tsunami deposits were collected along the coast of southwestern Hokkaido and Okushiri Island, northern Japan. The distribution of these deposits suggested that large earthquakes and tsunamis have repeatedly oc...

    Authors: Kei Ioki, Yuichiro Tanioka, Gentaro Kawakami, Yoshihiro Kase, Kenji Nishina, Wataru Hirose, Kei’ichi Hayashi and Ryo Takahashi

    Citation: Earth, Planets and Space 2019 71:54

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  5. Content type: Express Letter

    The Hokkaido Eastern Iburi earthquake (MJMA = 6.7) occurred on September 6, 2018, in the Hokkaido corner region where the Kurile and northeastern Japan island arcs meet. We relocated aftershocks of this intraplat...

    Authors: Kei Katsumata, Masayoshi Ichiyanagi, Mako Ohzono, Hiroshi Aoyama, Ryo Tanaka, Masamitsu Takada, Teruhiro Yamaguchi, Kazumi Okada, Hiroaki Takahashi, Shin’ichi Sakai, Satoshi Matsumoto, Tomomi Okada, Toru Matsuzawa, Shuichiro Hirano, Toshiko Terakawa, Shinichiro Horikawa…

    Citation: Earth, Planets and Space 2019 71:53

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  6. Content type: Full paper

    We report a statistical study of medium-scale traveling ionospheric disturbances (MSTIDs) during 2014–2017 in the low-latitude China region using the Hong Kong Continuously Operating Reference Stations network...

    Authors: Guanyi Chen, Chen Zhou, Yi Liu, Jiaqi Zhao, Qiong Tang, Xiang Wang and Zhengyu Zhao

    Citation: Earth, Planets and Space 2019 71:52

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  7. Content type: Comment

    A recent work by Kimura et al. (Earth Planets Space 71:27, 2019. https://​doi.​org/​10.​1186/​s40623-019-1006-x) (hereafter referred to as K19) claims to provide ...

    Authors: Martin Vallée, Jean Paul Ampuero, Kévin Juhel, Pascal Bernard, Jean-Paul Montagner and Matteo Barsuglia

    Citation: Earth, Planets and Space 2019 71:51

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  8. Content type: Express Letter

    Based on analyses of global navigation satellite system data since 1996, we investigate the spatiotemporal strain field around the Ishikari-Teichi-Toen fault zone, which is a major active fault zone close to t...

    Authors: Mako Ohzono, Hiroaki Takahashi and Chihiro Ito

    Citation: Earth, Planets and Space 2019 71:50

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  9. Content type: Full paper

    Definite increases in the components ratios of CO2/H2O, CO2/H2S, CO2/CH4 and He/CH4 were observed at the fumarolic gases from Owakudani geothermal area located at the center of Hakone volcanic caldera (Honshu Isl...

    Authors: Takeshi Ohba, Muga Yaguchi, Kana Nishino, Nozomi Numanami, Yasushi Daita, Chiho Sukigara, Masanori Ito and Urumu Tsunogai

    Citation: Earth, Planets and Space 2019 71:48

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  10. Content type: Full paper

    Spread-F is known as the electron density inhomogeneous structures in F layer of ionosphere and can usually be classified as frequency spread-F (FSF) and range spread-F (RSF). Few studies have reported on the ...

    Authors: Ning Wang, Lixin Guo, Zonghua Ding, Zhenwei Zhao, Zhengwen Xu, Tong Xu and Yanli Hu

    Citation: Earth, Planets and Space 2019 71:47

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  11. Content type: Correction

    Portions of this letter come from the content published in the paper by Ware et al. [1].

    Authors: Randolph H. Ware, David W. Fulker, Seth A. Stein, David N. Anderson, Susan K. Avery, Richard D. Clark, Kelvin K. Droegemeier, Joachim P. Kuettner, J. Minster and Soroosh Sorooshian

    Citation: Earth, Planets and Space 2019 71:46

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    The original article was published in Earth, Planets and Space 2014 52:BF03352303

  12. Content type: Correction

    In the original publication of this article Sun et al. (2019), “El” is missing at the beginning of the title.

    Authors: Yang‑Yi Sun, Huixin Liu, Yasunobu Miyoshi, Loren C. Chang and Libo Liu

    Citation: Earth, Planets and Space 2019 71:45

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    The original article was published in Earth, Planets and Space 2019 71:35

  13. Content type: Frontier letter

    The 2014–2015 eruption of the Nakadake first crater at Aso Volcano in southwestern Japan was characterized by continuous ash emissions and intermittent strombolian eruptions. In this paper, we present the dist...

    Authors: Yasuo Miyabuchi and Chihoko Hara

    Citation: Earth, Planets and Space 2019 71:44

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  14. Content type: Full paper

    A moment magnitude Mw9.0 earthquake hit northeastern Japan at 14:46:18 (Japan Standard Time), March 11, 2011. We have obtained 1 s precise point positioning solutions for 1198 GEONET stations. Although GPS pos...

    Authors: Peiliang Xu, Yuanming Shu, Jingnan Liu, Takuya Nishimura, Yun Shi and Jeffrey T. Freymueller

    Citation: Earth, Planets and Space 2019 71:43

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  15. Content type: Full paper

    The September 6–10, 2017 two-step magnetic storm was caused by an X9 solar flare followed by a CME. The SSC that occurred at 23:43 UT on day 06 when Sym-H reached about 50 nT, was due to a sudden increase in s...

    Authors: Eurico R. de Paula, Cesar B. A. de Oliveira, Ronald G. Caton, Patricia M. Negreti, Inez S. Batista, André R. F. Martinon, Acácio C. Neto, Mangalathayil A. Abdu, João F. G. Monico, Jonas Sousasantos and Alison O. Moraes

    Citation: Earth, Planets and Space 2019 71:42

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  16. Content type: Full paper

    We develop a modified envelope correlation method for locating deep tectonic tremors and apply it to construct a tremor catalog for western Japan. We redefine the envelope cross-correlation method as a maximum...

    Authors: Naoto Mizuno and Satoshi Ide

    Citation: Earth, Planets and Space 2019 71:40

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  17. Content type: Express Letter

    During the past two decades, studies of the Aso volcano in Japan have improved our understanding of the shallow hydrothermal system that exists beneath the active crater of this volcano. Detailed knowledge of ...

    Authors: Wataru Kanda, Mitsuru Utsugi, Shinichi Takakura and Hiroyuki Inoue

    Citation: Earth, Planets and Space 2019 71:37

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  18. Content type: Full paper

    Coronal mass ejections (CMEs) cause disturbances in the environment of the Earth when they arrive at the Earth. However, the prediction of the arrival of CMEs still remains a challenge. We have developed an in...

    Authors: Kazumasa Iwai, Daikou Shiota, Munetoshi Tokumaru, Ken’ichi Fujiki, Mitsue Den and Yûki Kubo

    Citation: Earth, Planets and Space 2019 71:39

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  19. Content type: Full paper

    The winonaites are primitive achondrites that are associated with IAB iron meteorites. They provide valuable insights into differentiation processes on asteroids in the early Solar System. However, there is st...

    Authors: Xiaojia Zeng, Yingli Shang, Shijie Li, Xiongyao Li, Shijie Wang and Yang Li

    Citation: Earth, Planets and Space 2019 71:38

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  20. Content type: Full paper

    On 27 April 2016, White Island erupted in a multi-pulse, phreatic event that lasted for ~ 40 min. Six, variably sized pulses generated three ballistic ejections and at least one pyroclastic surge out of the in...

    Authors: Geoff Kilgour, Stephanie Gates, Ben Kennedy, Aaron Farquhar, Ame McSporran and Cameron Asher

    Citation: Earth, Planets and Space 2019 71:36

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  21. Content type: Full paper

    This study examines the influence of the El Niño–Southern Oscillation (ENSO) on the ionospheric total electron content (TEC) diurnal eastward 3 (DE3) and stationary planetary wave 4 (SPW4) which are the major ...

    Authors: Yang-Yi Sun, Huixin Liu, Yasunobu Miyoshi, Loren C. Chang and Libo Liu

    Citation: Earth, Planets and Space 2019 71:35

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    The Correction to this article has been published in Earth, Planets and Space 2019 71:45

  22. Content type: Full paper

    On June 18, 2018, an MJMA6.1 inland crustal earthquake occurred on the northeast edge of the Osaka basin, Japan. This event impacted the region by the maximum PGA larger than 0.9 g, and it was followed by a serie...

    Authors: Miroslav Hallo, Ivo Opršal, Kimiyuki Asano and František Gallovič

    Citation: Earth, Planets and Space 2019 71:34

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  23. Content type: Express Letter

    Owing to the strict restrictions on the use of air guns in marine seismic surveys due to concerns about their potential impact on the marine ecosystem, there have been several cases where seismic surveys were ...

    Authors: Tetsuro Tsuru, Kazuo Amakasu, Jin-Oh Park, Junichi Sakakibara and Mamoru Takanashi

    Citation: Earth, Planets and Space 2019 71:31

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  24. Content type: Full paper

    We have analyzed the temporal variation in coda Q in the northeastern part of an inland high strain rate zone, the Niigata–Kobe Tectonic Zone (NKTZ), in central Japan, to investigate the response of coda Q to the...

    Authors: Masanobu Dojo and Yoshihiro Hiramatsu

    Citation: Earth, Planets and Space 2019 71:32

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  25. Content type: Full paper

    The Mw 6.9 earthquake off Fukushima Prefecture, Japan, of 22 November 2016 was followed by a tsunami that struck the Japanese coast from Hokkaido in northern Japan to Wakayama Prefecture in western Japan. We comp...

    Authors: Kenji Nakata, Yutaka Hayashi, Hiroaki Tsushima, Kenichi Fujita, Yasuhiro Yoshida and Akio Katsumata

    Citation: Earth, Planets and Space 2019 71:30

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  26. Content type: Full paper

    Around the Ogasawara Islands, only a few seismic stations in the area can be used to determine the hypocenters of regional earthquakes; thus, hypocenter location precision tends to be low. To more precisely de...

    Authors: Kenji Nakata, Akio Kobayashi, Akio Katsumata, Fuyuki Hirose, Takahito Nishimiya, Kazuhiro Kimura, Hiroaki Tsushima, Kenji Maeda, Hisatoshi Baba, Noritaka Hanamura, Chisato Yamada and Masashi Kanezashi

    Citation: Earth, Planets and Space 2019 71:29

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  27. Content type: Full paper

    Earthquake ruptures cause mass redistribution, which is expected to induce transient gravity perturbations simultaneously at all distances from the source before the arrival of P-waves. A recent research paper...

    Authors: Masaya Kimura, Nobuki Kame, Shingo Watada, Makiko Ohtani, Akito Araya, Yuichi Imanishi, Masaki Ando and Takashi Kunugi

    Citation: Earth, Planets and Space 2019 71:27

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  28. Content type: Full paper

    We conducted a broadband magnetotelluric (MT) survey along a north–south transect across Unzen graben, Japan. The MT survey line is located ~ 2 km west of the most recent lava dome and consisted of 27 stations...

    Authors: Agnis Triahadini, Koki Aizawa, Yoshiko Teguri, Takao Koyama, Kaori Tsukamoto, Dan Muramatsu, Keita Chiba and Makoto Uyeshima

    Citation: Earth, Planets and Space 2019 71:28

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  29. Content type: Full paper

    The St. Patrick’s Day phenomenon is a geomagnetic storm that deserves serious discussion because of its intensity and effectiveness. This study focuses on the St. Patrick’s Day storm on March 17, 2015, which i...

    Authors: Emre Eroglu

    Citation: Earth, Planets and Space 2019 71:26

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  30. Content type: Full paper

    At approximately 09:36 UTC on 27 April 2016, a phreatic eruption occurred on Whakaari Island (White Island) producing an eruption sequence that contained multiple eruptive pulses determined to have occurred ov...

    Authors: Braden Walsh, Jonathan Procter, Ivan Lokmer, Johannes Thun, Tony Hurst, Bruce Christenson and Arthur Jolly

    Citation: Earth, Planets and Space 2019 71:25

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  31. Content type: Full paper

    In order to statistically investigate the relationship between the low-latitude coronal holes (CHs), the solar wind speed, and the geomagnetic activity in solar cycles 23 (1996–2008) and 24 (2009–2016), we con...

    Authors: Yumi Nakagawa, Satoshi Nozawa and Atsuki Shinbori

    Citation: Earth, Planets and Space 2019 71:24

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  32. Content type: Express Letter

    We present results from the analysis of observations of the Chang’e 3 lander using geodetic Very Long Baseline Interferometry. The applied processing strategy as well as the limiting factors to our approach is...

    Authors: Grzegorz Klopotek, Thomas Hobiger, Rüdiger Haas, Frédéric Jaron, Laura La Porta, Axel Nothnagel, Zhongkai Zhang, Songtao Han, Alexander Neidhardt and Christian Plötz

    Citation: Earth, Planets and Space 2019 71:23

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  33. Content type: Full paper

    Polar mesospheric summer echoes (PMSE) often show different layers. Artificial electron heating experiments are an important diagnostic tool to investigate the parameters in the PMSE regions. The response of P...

    Authors: Safi Ullah, Hailong Li, Abdur Rauf, Lin Meng, Bin Wang and Maoyan Wang

    Citation: Earth, Planets and Space 2019 71:22

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  34. Content type: Full paper

    The Okinawa Trough, to the southwest of Kyusyu, Japan, is an active backarc basin of the Ryukyu (Nansei-Shoto) island arc–trench system caused by the Philippine Sea plate subduction. Unlike other backarc basin...

    Authors: Azusa Nishizawa, Kentaro Kaneda, Mitsuhiro Oikawa, Daishi Horiuchi, Yukari Fujioka and Chiaki Okada

    Citation: Earth, Planets and Space 2019 71:21

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  35. Content type: Full paper

    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

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  36. Content type: Express Letter

    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

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  37. Content type: Express Letter

    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

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  38. Content type: Full paper

    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

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  39. Content type: Express Letter

    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

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  40. Content type: Full paper

    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

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  41. Content type: Full paper

    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

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