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  1. The northeastern Turkey is located at the intensely deformed east Anatolian Collision Zone that is formed by the collision of the Arabian Plate with Eurasia. The region is one of the best examples of the conti...

    Authors: Özlem Hacıoğlu, Ahmet Tuğrul Başokur and Elif Tolak Çiftçi

    Citation: Earth, Planets and Space 2018 70:161

    Content type: Full paper

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  2. Typical eruptions of Taal Volcano in the Philippines are frequent and violently explosive. The last devastating phreatomagmatic eruption from 1965 to 1977 resulted in the death of about 200 persons. For this a...

    Authors: Jacques Zlotnicki, Y. Sasai, M. J. S. Johnston, F. Fauquet, E. Villacorte and J. M. Cordon Jr.

    Citation: Earth, Planets and Space 2018 70:159

    Content type: Full paper

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  3. The St. Patrick’s Day geomagnetic storm on March 17, 2015, has been chosen by the space community for synergetic analysis to build a more comprehensive picture of the storm’s origin and evolution. This storm h...

    Authors: Olga V. Kozyreva, Vyacheslav A. Pilipenko, Vladimir B. Belakhovsky and Yaroslav A. Sakharov

    Citation: Earth, Planets and Space 2018 70:157

    Content type: Full paper

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  4. The effects of the short-wavelength heterogeneity of the crustal structure on predicted ground motion at periods of 1 s and longer were investigated by conducting three-dimensional finite-difference simulation...

    Authors: Asako Iwaki, Takahiro Maeda, Nobuyuki Morikawa, Shunsuke Takemura and Hiroyuki Fujiwara

    Citation: Earth, Planets and Space 2018 70:156

    Content type: Full paper

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  5. Magnetic mineral inclusions in silicates are widespread in sediments as well as in igneous rocks. Because they are isolated from surrounding environment, they have potential to preserve original magnetic signa...

    Authors: Yoichi Usui, Takaya Shimono and Toshitsugu Yamazaki

    Citation: Earth, Planets and Space 2018 70:153

    Content type: Full paper

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  6. Global navigation satellite system data from Hakone volcano, central Japan, together with GEONET data from the Geospatial Information Authority of Japan, were used to investigate the processes associated with ...

    Authors: Masatake Harada, Ryosuke Doke, Kazutaka Mannen, Kazuhiro Itadera and Mikio Satomura

    Citation: Earth, Planets and Space 2018 70:152

    Content type: Express Letter

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  7. Volcanic gas composition measurement by Multi-GAS was repeated during the eruptive period in 2014–2015 as well as the quiet period preceding the eruption at Nakadake crater, Aso volcano. The eruptive activity ...

    Authors: Hiroshi Shinohara, Akihiko Yokoo and Ryunosuke Kazahaya

    Citation: Earth, Planets and Space 2018 70:151

    Content type: Full paper

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  8. There are growing demands for integrated study of isotopes, trace elements and crystallography of micron-sized grains observed on polished sections or scattered on surface of sample holders. However, transmiss...

    Authors: Yuchen Xu, Lixin Gu, Yang Li, Bing Mo and Yangting Lin

    Citation: Earth, Planets and Space 2018 70:150

    Content type: Technical report

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  9. We conducted high-resolution reflection analysis of data from 168 seismic stations with an average spacing of about 5 km, in northern Kinki district, southwestern Japan. Reflection analysis has previously been...

    Authors: Shinya Katoh, Yoshihisa Iio, Hiroshi Katao, Masayo Sawada, Kazuhide Tomisaka, Tsutomu Miura and Itaru Yoneda

    Citation: Earth, Planets and Space 2018 70:149

    Content type: Express Letter

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  10. Analysis of 163 isolated substorms showed that their intensity quantified as a maximum absolute value of the AL index increases with an increase in the velocity and number density of the solar wind plasma and ...

    Authors: Vyacheslav Georgievich Vorobjev, Elizaveta Evgenievna Antonova and Oksana Ivanovna Yagodkina

    Citation: Earth, Planets and Space 2018 70:148

    Content type: Full paper

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  11. We discovered a secular change in the travel time of direct S-waves over a 10-year observation period by means of continuous operation of an artificial and stable seismic source, called Accurately Controlled R...

    Authors: Shuhei Tsuji, Koshun Yamaoka, Ryoya Ikuta, Takahiro Kunitomo, Toshiki Watanabe, Yasuhiro Yoshida and Akio Katsumata

    Citation: Earth, Planets and Space 2018 70:146

    Content type: Express Letter

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  12. The geomagnetic field is comprised of drifting and standing fields. The drifting field has two remarkable features. One is predominance of sectorial harmonics when the field is expressed in a spherical harmoni...

    Authors: Takesi Yukutake and Hisayoshi Shimizu

    Citation: Earth, Planets and Space 2018 70:145

    Content type: Full paper

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  13. We performed a simultaneous survey of self-potential and plume turbidity using an autonomous underwater vehicle (AUV) above the Sunrise deposit in the Myojin Knoll caldera of the Izu-Ogasawara arc. A 10-m-long...

    Authors: Yoshifumi Kawada and Takafumi Kasaya

    Citation: Earth, Planets and Space 2018 70:142

    Content type: Full paper

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  14. The characteristic features of the quarterdiurnal tide (QDT) in the mesosphere and lower thermosphere (MLT) are investigated using meteor radar observations from three low-latitude southern hemispheric station...

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

    Citation: Earth, Planets and Space 2018 70:140

    Content type: Full paper

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  15. During the last magmatic eruption period of Aso volcano (November 2014 to May 2015), a controlled-source electromagnetic volcano monitoring experiment (ACTIVE) was conducted. Here, we interpret the temporal va...

    Authors: Takuto Minami, Mitsuru Utsugi, Hisashi Utada, Tsuneomi Kagiyama and Hiroyuki Inoue

    Citation: Earth, Planets and Space 2018 70:138

    Content type: Express Letter

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  16. The most recent and largest caldera-forming eruption occurred at ~ 90 ka at Aso Volcano, SW Japan, and is known as the “Aso-4 eruption.” We performed chemical analyses of amphibole phenocrysts from Aso-4 pyroc...

    Authors: Hidemi Ishibashi, Yukiko Suwa, Masaya Miyoshi, Atsushi Yasuda and Natsumi Hokanishi

    Citation: Earth, Planets and Space 2018 70:137

    Content type: Full paper

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  17. In contrast to surface observation of complex earthquake faults, simple fault-plane models are frequently sufficient to fit geophysical data of seismic wave or crustal deformation. However, earthquake occurren...

    Authors: Yuta Mitsui

    Citation: Earth, Planets and Space 2018 70:136

    Content type: Full paper

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  18. The definitive existence of a giant impact crater, two times larger than the Chixulub crater in the Yucatan peninsula, from an extraterrestrial origin, 1.6 km beneath Wilkes Land, East Antarctica, remain contr...

    Authors: Jaroslav Klokočník, Jan Kostelecký and Aleš Bezděk

    Citation: Earth, Planets and Space 2018 70:135

    Content type: Full paper

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  19. The extremely high-energy electron experiment (XEP) onboard the Arase (ERG) satellite is designed to measure high-energy electrons in the Earth’s radiation belts. The XEP was developed by taking advantage of o...

    Authors: Nana Higashio, Takeshi Takashima, Iku Shinohara and Haruhisa Matsumoto

    Citation: Earth, Planets and Space 2018 70:134

    Content type: Full paper

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  20. Invariants under rotation of the magnetotelluric impedance tensor relax the directional requirements when fitting data using two-dimensional (2D) models. This happens, for instance, when using the familiar imp...

    Authors: Enrique Gómez-Treviño, Yunuhen Muñiz, Mayra Cuellar and Armando Calderón-Moctezuma

    Citation: Earth, Planets and Space 2018 70:133

    Content type: Full paper

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  21. The European Space Agency’s three-satellite constellation Swarm, launched in November 2013, has provided unprecedented monitoring of Earth’s magnetic field via a unique set of gradiometric and multi-satellite mea...

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

    Citation: Earth, Planets and Space 2018 70:130

    Content type: Full paper

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  22. We have analyzed the role of auroral processes in the formation of the outer radiation belt, considering that the main part of the auroral oval maps to the outer part of the ring current, instead of the plasma...

    Authors: Elizaveta E. Antonova, Marina V. Stepanova, Pablo S. Moya, Victor A. Pinto, Vadim V. Vovchenko, Ilya L. Ovchinnikov and Nikita V. Sotnikov

    Citation: Earth, Planets and Space 2018 70:127

    Content type: Full paper

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  23. Optical auroral measurements repeatedly reveal the existence of a transitional stage between a quiescent preexisting arc and its significant auroral expansion in a substorm onset. Such a transitional stage of ...

    Authors: Jun Liang, Eric Donovan, Deborah Gillies, Emma Spanswick and Martin Connors

    Citation: Earth, Planets and Space 2018 70:126

    Content type: Full paper

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  24. Volcanic tremor is often observed to be associated with an increase in volcanic activity and during periods approaching eruptions. It is therefore of crucial importance to study this phenomenon. The opening of...

    Authors: Misa Ichimura, Akihiko Yokoo, Tsuneomi Kagiyama, Shin Yoshikawa and Hiroyuki Inoue

    Citation: Earth, Planets and Space 2018 70:125

    Content type: Full paper

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  25. Recent advances in the field of atmospheric and ionospheric sensing by GNSS and SAR technologies were discussed during two workshops held in February 2016 and October 2016 in Italy, hosted by GEOlab of Politec...

    Authors: Toshitaka Tsuda, Eugenio Realini, Yoshinori Shoji, Akinori Saito, Masanori Yabuki and Masato Furuya

    Citation: Earth, Planets and Space 2018 70:123

    Content type: Preface

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  26. Seismic refraction and multi-channel seismic reflection surveys were conducted on the northeastern Hawaiian Arch to examine the effect of hotspot volcanism on the seismic structure of the crust and uppermost m...

    Authors: Akane Ohira, Shuichi Kodaira, Gregory F. Moore, Mikiya Yamashita, Toshiya Fujiwara, Yuka Kaiho, Seiichi Miura and Gou Fujie

    Citation: Earth, Planets and Space 2018 70:121

    Content type: Full paper

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  27. Horizontal crustal strain in the Tohoku area during the twentieth century based on triangulation showed N–S extension and E–W contraction was not significant. This feature was one of the reasons why the 2011 T...

    Authors: Takeshi Sagiya, Nobuhisa Matta and Yusaku Ohta

    Citation: Earth, Planets and Space 2018 70:120

    Content type: Full paper

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  28. The global dynamics of substorms are controlled by several key magnetospheric parameters. In this work we obtain quantitative measures of these parameters from a low-order nonlinear model of the nightside magn...

    Authors: Edmund Spencer, Sai Krishna Vadepu, Pavithra Srinivas, Swadesh Patra and Wendell Horton

    Citation: Earth, Planets and Space 2018 70:118

    Content type: Full paper

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  29. The 2015 unrest of the Hakone volcano in Japan, which began on April 26, generated earthquake swarms accompanied by long-term deformation. The earthquake swarm activity reached its maximum in mid-May and gradu...

    Authors: Ryou Honda, Yohei Yukutake, Yuichi Morita, Shin’ichi Sakai, Kazuhiro Itadera and Kazuya Kokubo

    Citation: Earth, Planets and Space 2018 70:117

    Content type: Full paper

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  30. In order to investigate the seismic velocity structure in the region of concentrated severe damage during the 2016 Kumamoto earthquake sequence, we conducted continuous seismic observations in the central area...

    Authors: Takumi Hayashida, Masumi Yamada, Masayuki Yamada, Koji Hada, Jim Mori, Yoshinori Fujino, Hiromu Sakaue, Sosuke Fukatsu, Eiko Nishihara, Toru Ouchi and Akio Fujii

    Citation: Earth, Planets and Space 2018 70:116

    Content type: Full paper

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  31. The real-time estimation of polar motion (PM) is needed for the navigation of Earth satellite and interplanetary spacecraft. However, it is impossible to have real-time information due to the complexity of the...

    Authors: Sadegh Modiri, Santiago Belda, Robert Heinkelmann, Mostafa Hoseini, José M. Ferrándiz and Harald Schuh

    Citation: Earth, Planets and Space 2018 70:115

    Content type: Full paper

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  32. In association with the September 2014 phreatic eruption (VEI 1–2) at Ontake Volcano, a syn-eruptive and two post-eruptive lahars occurred in the Akagawa–Nigorigawa River, southern flank of the volcano. The pr...

    Authors: Kyoko S. Kataoka, Takane Matsumoto, Takeshi Saito, Katsuhisa Kawashima, Yoshitaka Nagahashi, Tsutomu Iyobe, Akihiko Sasaki and Keisuke Suzuki

    Citation: Earth, Planets and Space 2018 70:113

    Content type: Full paper

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  33. A simple and rapid technique to effectively remove volcanic smoke (vapor-dominated white plume) from visible or thermal infrared images of active craters is proposed, in which multiple photographs taken in a f...

    Authors: Takeshi Hashimoto, Akihiko Terada and Ryo Tanaka

    Citation: Earth, Planets and Space 2018 70:109

    Content type: Frontier letter

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  34. The uppermost structures of incoming oceanic plates have been investigated by seismic exploration surveys, primarily based on two-dimensional profiles. However, their regional-scale lateral variations and shea...

    Authors: Takashi Tonegawa, Koichiro Obana, Gou Fujie and Shuichi Kodaira

    Citation: Earth, Planets and Space 2018 70:106

    Content type: Frontier letter

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