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  1. We investigated evolution of ionospheric currents during sudden commencements using a ground magnetometer network in conjunction with an all-sky imager, which has the advantage of locating field-aligned curren...

    Authors: Yukitoshi Nishimura, Takashi Kikuchi, Yusuke Ebihara, Akimasa Yoshikawa, Shun Imajo, Wen Li and Hisashi Utada
    Citation: Earth, Planets and Space 2016 68:144
    Content type: Full paper Published on:

  2. To clarify the effect of the dawn and dusk terminators on Pi2 pulsations, we statistically analyzed the longitudinal phase and amplitude structures of Pi2 pulsations at middle- to low-latitude stations (GMLat...

    Authors: Shun Imajo, Akimasa Yoshikawa, Teiji Uozumi, Shinichi Ohtani, Aoi Nakamizo, Sodnomsambuu Demberel and Boris Mikhailovich Shevtsov
    Citation: Earth, Planets and Space 2016 68:137
    Content type: Full paper Published on:

  3. We present an analysis of ionospheric irregularities at high latitudes during the 2015 St. Patrick’s Day storm. Our study used measurements from ~2700 ground-based GPS stations and GPS receivers onboard five l...

    Authors: Iurii Cherniak and Irina Zakharenkova
    Citation: Earth, Planets and Space 2016 68:136
    Content type: Letter Published on:

  4. Here we study the global distribution of the plasma density irregularities in the topside ionosphere by using the concurrent GPS and Langmuir probe measurements onboard the Swarm satellites. We analyze 18 mont...

    Authors: Irina Zakharenkova, Elvira Astafyeva and Iurii Cherniak
    Citation: Earth, Planets and Space 2016 68:120
    Content type: Letter Published on:

  5. The aim of this work is to study the properties of the magnetic field’s fluctuations produced by ionospheric and magnetospheric electric currents during the St. Patrick’s Day geomagnetic storm (17 March 2015)....

    Authors: Paola De Michelis, Giuseppe Consolini, Roberta Tozzi and Maria Federica Marcucci
    Citation: Earth, Planets and Space 2016 68:105
    Content type: Full paper Published on:

  7. The electric field instruments onboard the Swarm satellites make high-resolution measurements of the F-region ion drift. This paper presents an initial investigation of preliminary ion drift data made availabl...

    Authors: R. A. D. Fiori, A. V. Koustov, D. H. Boteler, D. J. Knudsen and J. K. Burchill
    Citation: Earth, Planets and Space 2016 68:100
    Content type: Full paper Published on:

  8. Preliminary Swarm Langmuir probe measurements recorded during March 2015, a period of time including the St. Patrick storm, are considered. Specifically, six time periods are identified: two quiet periods befo...

    Authors: Alessio Pignalberi, Michael Pezzopane, Roberta Tozzi, Paola De Michelis and Igino Coco
    Citation: Earth, Planets and Space 2016 68:93
    Content type: Full paper Published on:

  9. Multipoint observations of plasma waves are essential for separating spatial and temporal variations of a plasma turbulence. Miniaturization and high environmental (temperature and radiation) robustness are k...

    Authors: Mitsunori Ozaki, Satoshi Yagitani, Hirotsugu Kojima, Ken Takahashi, Hiroki Koji, Takahiro Zushi and Yuya Tokunaga
    Citation: Earth, Planets and Space 2016 68:91
    Content type: Technical report Published on:

  11. The 3D instability of spontaneous fast magnetic reconnection process is studied with magnetohydrodynamic simulations, where 2D model of the spontaneous fast magnetic reconnection process is destabilized in thr...

    Authors: Tohru Shimizu, Hiroyuki Torii and Koji Kondoh
    Citation: Earth, Planets and Space 2016 68:89
    Content type: Full paper Published on:

  14. A relatively new method based on measurements by multipoint continuous Doppler sounding is applied to study the occurrence rate, propagation velocities, and directions of spread F structures over Tucumán, Nor...

    Authors: Jaroslav Chum, Jann-Yenq Liu, Shih-Ping Chen, Miguel Angel Cabrera, Jan Laštovička, Jiří Baše, Dalia Burešová, Jiří Fišer, František Hruška and Rodolfo Ezquer
    Citation: Earth, Planets and Space 2016 68:56
    Content type: Full paper Published on:

  15. In this study, we develop a three-dimensional ionospheric tomography with the ground-based global position system (GPS) total electron content observations. Because of the geometric limitation of GPS observati...

    Authors: C. H. Chen, A. Saito, C. H. Lin, M. Yamamoto, S. Suzuki and G. K. Seemala
    Citation: Earth, Planets and Space 2016 68:32
    Content type: Full paper Published on:

    The Correction to this article has been published in Earth, Planets and Space 2020 72:118

    The Erratum to this article has been published in Earth, Planets and Space 2016 68:122

  16. In this study, we constructed an empirical model of the equatorial electrojet (EEJ), including local time and longitudinal dependence, based on simultaneous data from 12 magnetometer stations located in six lo...

    Authors: Nurul Shazana Abdul Hamid, Huixin Liu, Teiji Uozumi and Akimasa Yoshikawa
    Citation: Earth, Planets and Space 2015 67:205
    Content type: Letter Published on:

  17. A statistical study using a large dataset of Super Dual Auroral Radar Network (SuperDARN) observations is conducted for transient ionospheric plasma flows associated with sudden impulses (SI) recorded on groun...

    Authors: Tomoaki Hori, Atsuki Shinbori, Shigeru Fujita and Nozomu Nishitani
    Citation: Earth, Planets and Space 2015 67:190
    Content type: Frontier letter Published on:

  18. We present three eastward-expanding auroral surge (EEAS) events that were observed intermittently at intervals of about 15 min in the post-midnight sector (01:55–02:40 MLT) by all-sky imagers and magnetometers...

    Authors: Yoshimasa Tanaka, Yasunobu Ogawa, Akira Kadokura, Noora Partamies, Daniel Whiter, Carl-Fredrik Enell, Urban Brändström, Tima Sergienko, Björn Gustavsson, Alexander Kozlovsky, Hiroshi Miyaoka and Akimasa Yoshikawa
    Citation: Earth, Planets and Space 2015 67:182
    Content type: Full paper Published on:

  19. This paper (the second of a series) presents the results of statistical investigation of relationship between the interplanetary electric field E KL and the Polar Cap (PC) index in case of...

    Authors: OA Troshichev and DA Sormakov
    Citation: Earth, Planets and Space 2015 67:170
    Content type: Full paper Published on:

  20. Accurate mapping of the auroral oval into the equatorial plane is critical for the analysis of aurora and substorm dynamics. Comparison of ion pressure values measured at low altitudes by Defense Meteorologica...

    Authors: E. E. Antonova, V. G. Vorobjev, I. P. Kirpichev, O. I. Yagodkina and M. V. Stepanova
    Citation: Earth, Planets and Space 2015 67:166
    Content type: Letter Published on:

    The Erratum to this article has been published in Earth, Planets and Space 2015 67:188

  21. Substorm triggering was the focus of recent two-dimensional superposed-epoch analyses based on Geotail and THEMIS data. The results indicate that magnetic-field dipolarization at X∼−8 Re and magnetic reconnection...

    Authors: Hirotoshi Uchino and Shinobu Machida
    Citation: Earth, Planets and Space 2015 67:165
    Content type: FULL PAPER Published on:

  22. A nonlinear optimization algorithm coupled with a model of auroral current systems allows derivation of physical parameters from data and is the basis of a new inversion technique. We refer to this technique a...

    Authors: Martin Connors and Gordon Rostoker
    Citation: Earth, Planets and Space 2015 67:155
    Content type: Full paper Published on:

  23. The magnetosphere substorm plays a crucial role in the solar wind energy dissipation into the ionosphere. We report on the intensity of the high-latitude ionospheric irregularities during one of the largest st...

    Authors: Iurii Cherniak and Irina Zakharenkova
    Citation: Earth, Planets and Space 2015 67:151
    Content type: Letter Published on:

  24. This paper presents the first results of statistical analysis of 2-year data series obtained with the first midlatitude decameter coherent radar of Russian segment of SuperDARN network. Based on individual eve...

    Authors: Oleg I. Berngardt, Nina A. Zolotukhina and Alexey V. Oinats
    Citation: Earth, Planets and Space 2015 67:143
    Content type: LETTER Published on:

  25. Substorm initiation still remains an unsolved problem, even though there is a consensus among most researchers that its main stages include dayside reconnection and substorm expansion. Dayside reconnection res...

    Authors: M. Kubyshkina, N. Tsyganenko, V. Semenov, D. Kubyshkina, N. Partamies and E. Gordeev
    Citation: Earth, Planets and Space 2015 67:139
    Content type: FULL PAPER Published on:

  26. Recently, it was argued that Hall conductivity and peak intensity of equivalent ionospheric currents are sensitive to the amount of field-aligned acceleration of plasma sheet (PS) electrons, which in turn depe...

    Authors: V A Sergeev, N P Dmitrieva, N A Stepanov, D A Sormakov, V Angelopoulos and A V Runov
    Citation: Earth, Planets and Space 2015 67:133
    Content type: Letter Published on:

  27. This paper provides insights into the possible coupling between reconnection and interchange/ballooning in the magnetotail related to substorms and flow bursts. The results presented are largely based on recen...

    Authors: Joachim Birn, Yi-Hsin Liu, William Daughton, Michael Hesse and Karl Schindler
    Citation: Earth, Planets and Space 2015 67:110
    Content type: LETTER Published on:

  28. We present a comparative study of high-intensity long-duration continuous AE activity (HILDCAA) events, both isolated and those occurring in the “recovery phase” of geomagnetic storms induced by corotating int...

    Authors: Rajkumar Hajra, Bruce T Tsurutani, Ezequiel Echer, Walter D Gonzalez, Christiano Garnett Marques Brum, Luis Eduardo Antunes Vieira and Ondrej Santolik
    Citation: Earth, Planets and Space 2015 67:109
    Content type: Full paper Published on:

  30. It is important to study the ‘concentrated’ electrostatic solitary waves/structures (ESWs) associated with the magnetic reconnection. In the literature published as regards this topic, very few studies have re...

    Authors: Shiyou Li, Shifeng Zhang, Hong Cai and Sufang Yu
    Citation: Earth, Planets and Space 2014 66:161
    Content type: Full paper Published on:

  31. We investigate the aspect angle sensitivity of the pump-induced artificial optical emissions in the ionosphere over the European Incoherent Scatter Scientific Association (EISCAT) high-frequency transmitter fa...

    Authors: Michael J Kosch, Carl Bryers, Michael T Rietveld, Timothy K Yeoman and Yasunobu Ogawa
    Citation: Earth, Planets and Space 2014 66:159
    Content type: Full paper Published on:

  32. We derived the coronal magnetic field, plasma density, and temperature from the observation of polarization and intensity of radio thermal free-free emission using the Nobeyama Radioheliograph (NoRH) and extre...

    Authors: Kazumasa Iwai, Kiyoto Shibasaki, Satoshi Nozawa, Takuya Takahashi, Shinpei Sawada, Jun Kitagawa, Shun Miyawaki and Hirotaka Kashiwagi
    Citation: Earth, Planets and Space 2014 66:149
    Content type: Frontier letter Published on:

  33. We investigate possible generation mechanisms of Pc1 pearl structures using multi-point induction magnetometers in Athabasca in Canada, Magadan in Russia, and Moshiri in Japan. We selected two Pc1 pulsations t...

    Authors: Chae-Woo Jun, Kazuo Shiokawa, Martin Connors, Ian Schofield, Igor Poddelsky and Boris Shevtsov
    Citation: Earth, Planets and Space 2014 66:140
    Content type: FULL PAPER Published on:

  34. The Interuniversity Upper atmosphere Global Observation NETwork (IUGONET) project is a 6-year research project which started in 2009. The objective of this project is to establish a metadata database of variou...

    Authors: Shuji Abe, Norio Umemura, Yukinobu Koyama, Yoshimasa Tanaka, Manabu Yagi, Akiyo Yatagai, Atsuki Shinbori, Satoru UeNo, Yuka Sato and Naoki Kaneda
    Citation: Earth, Planets and Space 2014 66:133
    Content type: Technical report Published on:

  35. We plan to observe solar neutrons at Mt. Sierra Negra (4,600 m above sea level) in Mexico using the SciBar detector. This project is named the SciBar Cosmic Ray Telescope (SciCRT). The main aims of the SciCRT ...

    Authors: Yoshinori Sasai, Yuya Nagai, Yoshitaka Itow, Yutaka Matsubara, Takashi Sako, Diego Lopez, Tsukasa Itow, Kazuoki Munakata, Chihiro Kato, Masayoshi Kozai, Takahiro Miyazaki, Shoichi Shibata, Akitoshi Oshima, Hiroshi Kojima, Harufumi Tsuchiya, Kyoko Watanabe…
    Citation: Earth, Planets and Space 2014 66:130
    Content type: Letter Published on:

  36. This paper describes a neural network-based model developed to predict geomagnetic storms time K index as measured at a magnetic observatory located in Hermanus (34°25 S; 19°13 E), South Africa. The parameters us...

    Authors: Jean Uwamahoro and John Bosco Habarulema
    Citation: Earth, Planets and Space 2014 66:95
    Content type: Full paper Published on:

  39. Results of a superposed epoch (SPE) analysis of occurrence of phase scintillation and cycle slips at high latitudes keyed by arrival times of high-speed solar wind streams (HSS) and interplanetary coronal mass...

    Authors: Paul Prikryl, P Thayyil Jayachandran, Sajan C Mushini and Ian G Richardson
    Citation: Earth, Planets and Space 2014 66:62
    Content type: Full paper Published on:

  40. A long-duration upstream ultralow frequency (ULF) wave event was detected on 15 February 2009 by Cluster satellites, close to the bow shock nose. A clear wave activity was identified when the interplanetary ma...

    Authors: Mauro Regi, Marcello De Lauretis, Patrizia Francia and Umberto Villante
    Citation: Earth, Planets and Space 2014 66:43
    Content type: Full paper Published on:

  41. The propagation of compressional Pi 2 waves in the inner magnetosphere is investigated by analyzing the onset delay times between the ground and the geosynchronous altitude. We use the compressional component ...

    Authors: Shun Imajo, Kiyohumi Yumoto, Teiji Uozumi, Hideaki Kawano, Shuji Abe, Akihiro Ikeda, Kiyokazu Koga, Haruhisa Matsumoto, Takahiro Obara, Richard Marshall, Victor A Akulichev, Ayman Mahrous, Adam Liedloff and Akimasa Yoshikawa
    Citation: Earth, Planets and Space 2014 66:20
    Content type: Full paper Published on:
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