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  1. We statistically investigate the spectral scalings of magnetic fluctuations at the upstream and downstream regions near the Venusian bow shock and perform a differentiation by shock geometry. Based on the Venu...

    Authors: S. D. Xiao, M. Y. Wu, G. Q. Wang, Y. Q. Chen and T. L. Zhang

    Citation: Earth, Planets and Space 2021 73:13

    Content type: Express Letter

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  2. Crustal earthquake ruptures tend to initiate near fluid-rich zones. However, it is relatively unknown whether fluid-rich zones can further promote or arrest these ruptures. We image the electrical resistivity ...

    Authors: Koki Aizawa, Shinichi Takakura, Hisafumi Asaue, Katsuaki Koike, Ryokei Yoshimura, Ken’ichi Yamazaki, Shintaro Komatsu, Mitsuru Utsugi, Hiroyuki Inoue, Kaori Tsukamoto, Makoto Uyeshima, Takao Koyama, Wataru Kanda, Tohru Yoshinaga, Nobuo Matsushima, Kazunari Uchida…

    Citation: Earth, Planets and Space 2021 73:12

    Content type: Express Letter

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  3. We quantitatively examined the influence of pore fluid pressure and coseismic stress changes on the seismicity rate changes that followed the 2016 Kumamoto earthquake, on the basis of two approaches. One is a ...

    Authors: Kodai Nakagomi, Toshiko Terakawa, Satoshi Matsumoto and Shinichiro Horikawa

    Citation: Earth, Planets and Space 2021 73:11

    Content type: Full paper

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    The Correction to this article has been published in Earth, Planets and Space 2021 73:24

  4. Using the HF Doppler sounders at middle and low latitudes (Prague, Czech Republic; Tucuman, Argentina; Zhongli, Republic of China, and Sugadaira, Japan), we observed the electric fields of the geomagnetic sudd...

    Authors: Takashi Kikuchi, Jaroslav Chum, Ichiro Tomizawa, Kumiko K. Hashimoto, Keisuke Hosokawa, Yusuke Ebihara, Kornyanat Hozumi and Pornchai Supnithi

    Citation: Earth, Planets and Space 2021 73:10

    Content type: Full paper

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  5. Coronal mass ejections (CMEs) cause various disturbances of the space environment; therefore, forecasting their arrival time is very important. However, forecasting accuracy is hindered by limited CME observat...

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

    Citation: Earth, Planets and Space 2021 73:9

    Content type: Express Letter

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  6. The Iwo-yama volcano of the Kirishima Volcanic Complex in Japan had a small phreatic eruption in April 2018, which newly formed multiple vents. The activity was recorded by two infrasound sensors and two monit...

    Authors: Dan Muramatsu, Takeshi Matsushima and Mie Ichihara

    Citation: Earth, Planets and Space 2021 73:8

    Content type: Express Letter

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  7. We have performed a statistical data analysis on relationship between simultaneous Na density data and cosmic noise absorption (CNA) data, which is an indicator for energetic particle precipitation, obtained a...

    Authors: T. T. Tsuda, Y. -M. Tanaka, R. Tozu, K. Takizawa, M. K. Ejiri, T. Nishiyama, T. D. Kawahara and T. Nakamura

    Citation: Earth, Planets and Space 2021 73:7

    Content type: Full paper

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  8. Surface waves from the 2017 Mw8.2 Tehuantepec earthquake remotely triggered tectonic tremors in the Jalisco region, approximately 1000 km WNW in the northern Mexican subduction zone. This is the first observation...

    Authors: Masatoshi Miyazawa and Miguel Ángel Santoyo

    Citation: Earth, Planets and Space 2021 73:6

    Content type: Full paper

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  9. To analyze the process of subduction of the Nazca and South American plates in the area of the Southern Andes, and its relationship with the tectonic and volcanic regime of the place, magnetotelluric measureme...

    Authors: Maria Jose Segovia, Daniel Diaz, Katarzyna Slezak and Felipe Zuñiga

    Citation: Earth, Planets and Space 2021 73:5

    Content type: Full paper

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  10. Vertical magnetic transfer functions (tippers) estimated at island observatories can constrain the one-dimensional (1-D) conductivity distribution of the oceanic lithosphere and upper mantle. This is feasible ...

    Authors: Rafael Rigaud, Mikhail Kruglyakov, Alexey Kuvshinov, Katia J. Pinheiro, Johannes Petereit, Juergen Matzka and Elena Marshalko

    Citation: Earth, Planets and Space 2021 73:3

    Content type: Full paper

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  11. Chemical stratigraphy is useful for dating deep-sea sediments, which sometimes lack radiometric or biostratigraphic constraints. Oxic pelagic clay contains Fe–Mn oxyhydroxides that can retain seawater 187Os/188Os...

    Authors: Yoichi Usui and Toshitsugu Yamazaki

    Citation: Earth, Planets and Space 2021 73:2

    Content type: Express Letter

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  12. The tectonic stress field was investigated in and around the aftershock area of the Hokkaido Eastern Iburi earthquake (MJMA = 6.7) occurred on 6 September 2018. We deployed 26 temporary seismic stations in the af...

    Authors: Yuki Susukida, 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, Hiroki Miyamachi, Shuichiro Hirano…

    Citation: Earth, Planets and Space 2021 73:1

    Content type: Full paper

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  13. A 6 degrees-of-freedom (6DoF) sensor, measuring three components of translational acceleration and three components of rotation rate, provides the full history of motion it is exposed to. In Earth sciences 6Do...

    Authors: Felix Bernauer, Raphael F. Garcia, Naomi Murdoch, Veronique Dehant, David Sollberger, Cedric Schmelzbach, Simon Stähler, Joachim Wassermann, Heiner Igel, Alexandre Cadu, David Mimoun, Birgit Ritter, Valerio Filice, Özgür Karatekin, Luigi Ferraioli, Johan O. A. Robertsson…

    Citation: Earth, Planets and Space 2020 72:191

    Content type: Full paper

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  14. We show the statistical characteristics of quasi-6-day wave (Q6DW) absolute amplitude in foE and foF2 during 2014–2015 by using six ionosondes at different latitudes. The results show that foE perturbations maxim...

    Authors: Yi Liu, Qiong Tang, Guanyi Chen, Zhuangkai Wang and Chen Zhou

    Citation: Earth, Planets and Space 2020 72:190

    Content type: Full paper

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  15. Constructing a high-precision and high-resolution gravimetric geoid model in the mountainous area is a quite challenging task because of the lack of terrestrial gravity observations, rough topography and the g...

    Authors: Tao Jiang, Yamin Dang and Chuanyin Zhang

    Citation: Earth, Planets and Space 2020 72:189

    Content type: Full paper

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  16. We used near-field strong-motion data to investigate the complex combination of source effect and site response for two recent disastrous earthquakes in southwest Taiwan. We estimated strong-motion generation ...

    Authors: Yi-Ying Wen, Yin-Tung Yen, Chun-Hsiang Kuo and Kuo‐En Ching

    Citation: Earth, Planets and Space 2020 72:188

    Content type: Full paper

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  17. For more than 30 years, a two-step mechanism was used to explain observed Atmospheric band emission (762 nm) in mesopause region. A new mechanism, which leads to the formation of electronically excited molecul...

    Authors: Mykhaylo Grygalashvyly and Gerd Reinhold Sonnemann

    Citation: Earth, Planets and Space 2020 72:187

    Content type: Express Letter

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  18. Allan variances and its related methods are commonly used to analyse a sequence of data in the time domain to measure frequency stability of oscillators. It allows for a determination of noise type as a functi...

    Authors: Kamil Maciuk, Jacek Kudrys, Mohammad Bagherbandi and Igor V. Bezmenov

    Citation: Earth, Planets and Space 2020 72:186

    Content type: Express Letter

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  19. Quantitative analysis of bubble textures in a large number of volcanic pyroclasts is critical to investigating the eruption dynamics in a volcanic conduit. Here, we used a digital stereo microscope with low-an...

    Authors: Masatoshi Ohashi, Mie Ichihara, Fukashi Maeno, Ben Kennedy and Darren Gravley

    Citation: Earth, Planets and Space 2020 72:185

    Content type: Full paper

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  20. Microwave electromagnetic signals from the Global Navigation Satellite System (GNSS) are affected by their travel through the atmosphere: the troposphere, a non-dispersive medium, has an especial impact on the...

    Authors: Gaël Kermarrec and Steffen Schön

    Citation: Earth, Planets and Space 2020 72:184

    Content type: Full paper

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  21. The generation and evolution of artificial plasma clouds is a complicated process that is strongly dependent on the background environment and release conditions. In this paper, based on a three-dimensional tw...

    Authors: Xiaoli Zhu, Yaogai Hu, Zhengyu Zhao, Binbin Ni and Yuannong Zhang

    Citation: Earth, Planets and Space 2020 72:183

    Content type: Full paper

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  22. We studied temporal variation of the differential rotation and poleward meridional circulation during solar cycle 24 using the magnetic element feature tracking technique. We used line-of-sight magnetograms ob...

    Authors: Shinsuke Imada, Kengo Matoba, Masashi Fujiyama and Haruhisa Iijima

    Citation: Earth, Planets and Space 2020 72:182

    Content type: Full paper

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  23. Polarimetry is a crucial method to investigate solar magnetic fields. From the viewpoint of space weather, the magnetic field in solar filaments, which occasionally erupt and develop into interplanetary flux r...

    Authors: Yoichiro Hanaoka, Yukio Katsukawa, Satoshi Morita, Yukiko Kamata and Noriyoshi Ishizuka

    Citation: Earth, Planets and Space 2020 72:181

    Content type: Technical report

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  24. This study monitors the land subsidence of the whole Pearl River Delta (PRD) (area: ~ 40,000 km2) in China using the ALOS1/PALSAR data (2006–2011) through the SBAS-InSAR method. We also analyze the relationship b...

    Authors: Genger Li, Guangcai Feng, Zhiqiang Xiong, Qi Liu, Rongan Xie, Xiaoling Zhu, Shuran Luo and Yanan Du

    Citation: Earth, Planets and Space 2020 72:179

    Content type: Full paper

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  25. Upper atmospheric conditions are crucial for the safe operation of spacecraft orbiting near Earth and for communication and positioning systems using radio signals. To understand and predict the upper atmosphe...

    Authors: Chihiro Tao, Hidekatsu Jin, Yasunobu Miyoshi, Hiroyuki Shinagawa, Hitoshi Fujiwara, Michi Nishioka and Mamoru Ishii

    Citation: Earth, Planets and Space 2020 72:178

    Content type: Full paper

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  26. Crustal pore pressure, which controls the activities of earthquakes and volcanoes, varies in response to rainfall. The status of pore pressure can be inferred from observed changes in seismic velocity. In this...

    Authors: Rezkia Dewi Andajani, Takeshi Tsuji, Roel Snieder and Tatsunori Ikeda

    Citation: Earth, Planets and Space 2020 72:177

    Content type: Full paper

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  27. An MW 7.1 ~ 50-km-deep intraslab earthquake within the Pacific/Yakutat slab underlying the North American Plate struck Anchorage, southern Alaska, on November 30, 2018. The ground-motion records very close to the...

    Authors: Yujia Guo, Ken Miyakoshi and Masato Tsurugi

    Citation: Earth, Planets and Space 2020 72:176

    Content type: Full paper

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  28. In this study, the seasonal variations of the EEJ longitudinal profiles were examined based on the full CHAMP satellite magnetic measurements from 2001 to 2010. A total of 7537 satellite noon-time passes acros...

    Authors: Zié Tuo, Vafi Doumbia, Pierdavide Coïsson, N’Guessan Kouassi and Abdel Aziz Kassamba

    Citation: Earth, Planets and Space 2020 72:174

    Content type: Full paper

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  29. Solar flares trigger an increase in plasma density in the ionosphere including the D region, and cause the absorption of radio waves, especially in high-frequency (HF) ranges, called short-wave fadeout (SWF). ...

    Authors: Chihiro Tao, Michi Nishioka, Susumu Saito, Daikou Shiota, Kyoko Watanabe, Naoto Nishizuka, Takuya Tsugawa and Mamoru Ishii

    Citation: Earth, Planets and Space 2020 72:173

    Content type: Full paper

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  30. Simultaneously estimating plasma parameters of the ionosphere presents a problem for the incoherent scatter radar (ISR) technique at altitudes between ~ 130 and ~ 300 km. Different mixtures of ion concentratio...

    Authors: Miguel Martínez-Ledesma and Francisco Jaramillo Montoya

    Citation: Earth, Planets and Space 2020 72:172

    Content type: Technical report

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  31. Infrasonic stations are sparse at many volcanoes, especially those on remote islands and those with less frequent eruptions. When only a single infrasound station is available, the seismic–infrasonic cross-cor...

    Authors: Aika K. Kurokawa and Mie Ichihara

    Citation: Earth, Planets and Space 2020 72:171

    Content type: Full paper

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  32. Thermal demagnetization furnaces are widely used paleomagnetic facilities for progressive removal of naturally acquired magnetic remanence or the imparting of well-controlled laboratory magnetization. An ideal...

    Authors: Huafeng Qin, Xiang Zhao, Shuangchi Liu, Greig A. Paterson, Zhaoxia Jiang, Shuhui Cai, Jinhua Li, Qingsong Liu and Rixiang Zhu

    Citation: Earth, Planets and Space 2020 72:170

    Content type: Technical report

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  33. On January 19, 2020, an Mw 6.0 earthquake occurred in Jiashi, Xinjiang Uygur Autonomous Region of China. The epicenter was located at the basin-mountain boundary between the southern Tian Shan and the Tarim Basin...

    Authors: Pengfei Yu, Xuejun Qiao, Wei Xiong, Wei Chen, Zhaosheng Nie, Dijin Wang, Zhige Jia and Jie Li

    Citation: Earth, Planets and Space 2020 72:169

    Content type: Full paper

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  34. We analyzed daily displacement time series from 34 continuous GPS stations in Nepal and 5 continuous GPS stations in South Tibet, China, and extracted the first 4.8 years of postseismic motion after the 2015 M...

    Authors: Lina Su, Fuqiang Shi, Weijun Gan, Xiaoning Su and Junyi Yan

    Citation: Earth, Planets and Space 2020 72:168

    Content type: Full paper

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  35. The COVID-19 pandemic that started at the end of 2019 forced populations around the world to reduce social and economic activities; it is believed that this can prevent the spread of the disease. In this paper...

    Authors: Suguru Yabe, Kazutoshi Imanishi and Kiwamu Nishida

    Citation: Earth, Planets and Space 2020 72:167

    Content type: Full paper

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  36. Sediment lithology, especially the clay mineral fraction, is basic geologic information, which is important for understanding faulting and evolutionary process of the accretionary prism. During scientific dril...

    Authors: Suguru Yabe, Rina Fukuchi, Yohei Hamada and Gaku Kimura

    Citation: Earth, Planets and Space 2020 72:166

    Content type: Full paper

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  37. Ionospheric irregularities can affect satellite communication and navigation by causing scintillations of radio signals. The scintillations are routinely measured using ground-based networks of receivers. This...

    Authors: Sharon Aol, Stephan Buchert and Edward Jurua

    Citation: Earth, Planets and Space 2020 72:164

    Content type: Full paper

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  38. We present a new model of the geomagnetic field spanning the last 20 years and called Kalmag. Deriving from the assimilation of CHAMP and Swarm vector field measurements, it separates the different contributio...

    Authors: Julien Baerenzung, Matthias Holschneider, Johannes Wicht, Vincent Lesur and Sabrina Sanchez

    Citation: Earth, Planets and Space 2020 72:163

    Content type: Full paper

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  39. Electric currents flowing in the terrestrial ionosphere have conventionally been diagnosed by low-earth-orbit (LEO) satellites equipped with science-grade magnetometers and long booms on magnetically clean sat...

    Authors: Jaeheung Park, Claudia Stolle, Yosuke Yamazaki, Jan Rauberg, Ingo Michaelis and Nils Olsen

    Citation: Earth, Planets and Space 2020 72:162

    Content type: Full paper

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  40. We aimed to perform three-dimensional imaging of the underlying geothermal system to a depth of 2 km using magnetotellurics (MT) at around the Yugama crater, the Kusatsu–Shirane Volcano, Japan, which is known ...

    Authors: Kuo Hsuan Tseng, Yasuo Ogawa, Nurhasan, Sabri Bülent Tank, Naoto Ujihara, Yoshimori Honkura, Akihiko Terada, Yoshiya Usui and Wataru Kanda

    Citation: Earth, Planets and Space 2020 72:161

    Content type: Express Letter

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  41. We present the geomagnetic field model COV-OBS.x2 that covers the period 1840–2020. It is primarily constrained by observatory series, satellite data, plus older surveys. Over the past two decades, we consider...

    Authors: Loïc Huder, Nicolas Gillet, Christopher C. Finlay, Magnus D. Hammer and Hervé Tchoungui

    Citation: Earth, Planets and Space 2020 72:160

    Content type: Full paper

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  42. Postseismic Global Navigation Satellite System (GNSS) time series followed by megathrust earthquakes can be interpreted as a result of afterslip on the plate interface, especially in its early phase. Afterslip...

    Authors: Masayuki Kano, Shin’ichi Miyazaki, Yoichi Ishikawa and Kazuro Hirahara

    Citation: Earth, Planets and Space 2020 72:159

    Content type: Full paper

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  43. A driving stress of the Mw5.8 reverse-faulting Awaji Island earthquake (2013), southwest Japan, was investigated using focal mechanism solutions of earthquakes before and after the mainshock. The seismic records ...

    Authors: Kazutoshi Imanishi, Makiko Ohtani and Takahiko Uchide

    Citation: Earth, Planets and Space 2020 72:158

    Content type: Full paper

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  44. The IGRF offers an important incentive for testing algorithms predicting the Earth’s magnetic field changes, known as secular variation (SV), in a 5-year range. Here, we present a SV candidate model for the 13...

    Authors: Sabrina Sanchez, Johannes Wicht and Julien Bärenzung

    Citation: Earth, Planets and Space 2020 72:157

    Content type: Full paper

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  45. Observations of the geomagnetic field taken at Earth’s surface and at satellite altitude are combined to construct continuous models of the geomagnetic field and its secular variation from 1957 to 2020. From t...

    Authors: I. Wardinski, D. Saturnino, H. Amit, A. Chambodut, B. Langlais, M. Mandea and E. Thébault

    Citation: Earth, Planets and Space 2020 72:155

    Content type: Full paper

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  46. As posted by the Working Group V of the International Association of Geomagnetism and Aeronomy (IAGA), the 13th generation of the International Geomagnetic Reference Field (IGRF) has been released at the end o...

    Authors: F. Javier Pavón-Carrasco, Santiago Marsal, J. Miquel Torta, Manuel Catalán, Fátima Martín-Hernández and J. Manuel Tordesillas

    Citation: Earth, Planets and Space 2020 72:152

    Content type: Full paper

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