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  1. To investigate the detailed structural properties of the oceanic crust of subducting oceanic plate, we analyzed high-frequency (1 to 16 Hz) trapped P waves during earthquakes that occurred near the oceanic crust ...

    Authors: Shunsuke Takemura, Kazuo Yoshimoto and Takashi Tonegawa
    Citation: Earth, Planets and Space 2015 67:41
    Content type: Full paper Published on:

  2. Enormous earthquakes repeatedly occur in subduction zones, and the slips along megathrusts, in particular those propagating to the toe of the forearc wedge, generate ruinous tsunamis. Quantitative evaluation o...

    Authors: Yohei Hamada, Arito Sakaguchi, Wataru Tanikawa, Asuka Yamaguchi, Jun Kameda and Gaku Kimura
    Citation: Earth, Planets and Space 2015 67:39
    Content type: Full paper Published on:

  4. The 11 April 2012 East Indian Ocean earthquake is unique because of its largest ever recorded aftershock. The main earthquake occurred with a magnitude of 8.6 Mw and was followed by a strong aftershock (8.2 Mw...

    Authors: Anakuzhikkal Sudarsanan Sunil, Mala S Bagiya, Chappidi Divakar Reddy, Manish Kumar and Durbha Sai Ramesh
    Citation: Earth, Planets and Space 2015 67:37
    Content type: Full paper Published on:

  5. Harmonic spectral features of electromagnetic waves in the frequencies of several Hz around the Moon have been identified by Kaguya. The waves have steepened waveforms peculiarly in the compressional component...

    Authors: Yasunori Tsugawa, Yuto Katoh, Naoki Terada, Hideo Tsunakawa, Futoshi Takahashi, Hidetoshi Shibuya, Hisayoshi Shimizu and Masaki Matsushima
    Citation: Earth, Planets and Space 2015 67:36
    Content type: Letter Published on:

  6. Due to the unique geometry of the geomagnetic fields near the magnetic equator and low-latitude regions, the satellite communication system in the African sector is strongly influenced by the effects resulting...

    Authors: Yekoye Asmare Tariku
    Citation: Earth, Planets and Space 2015 67:35
    Content type: Full paper Published on:

  7. High repetition-rate satellite laser ranging (SLR) offers new possibilities for the post-processing of the range measurements. We analyze 11 years of kHz SLR passes of the geodetic satellite Ajisai delivered b...

    Authors: Daniel Kucharski, Georg Kirchner, Toshimichi Otsubo and Franz Koidl
    Citation: Earth, Planets and Space 2015 67:34
    Content type: Full paper Published on:

  8. To conduct practical evaluations of the long-period ground motions (period of 4 to 8 s) in a laterally inhomogeneous large sedimentary basin, we constructed a three-dimensional (3D) sedimentary velocity struct...

    Authors: Shunsuke Takemura, Mai Akatsu, Kei Masuda, Kengo Kajikawa and Kazuo Yoshimoto
    Citation: Earth, Planets and Space 2015 67:33
    Content type: Full paper Published on:

  9. We present evidence from ion-scale plasma turbulence simulations that normal-mode waves and sideband waves co-exist when a plasma evolves from wave fields into turbulence. Ion-scale fluctuations represent norm...

    Authors: Horia Comişel, Yasuhito Narita and Uwe Motschmann
    Citation: Earth, Planets and Space 2015 67:32
    Content type: LETTER Published on:

  10. We analyzed trees that have survived on Yaku island (Yakushima) for 2,000 years. Quite surprisingly, the Fourier and wavelet analyses of the annual growth rate identified 2 cycles of periodicities of 11 and (2...

    Authors: Yasushi Muraki, Takumi Mitsutani, Shoichi Shibata, Syuichi Kuramata, Kimiaki Masuda and Kentaro Nagaya
    Citation: Earth, Planets and Space 2015 67:31
    Content type: LETTER Published on:

  11. To investigate the mechanical properties and deformation patterns of megathrusts in subduction zones, we studied damage zone structures of the Nobeoka Thrust, an exhumed megasplay fault in the Kyushu Shimanto ...

    Authors: Mari Hamahashi, Yohei Hamada, Asuka Yamaguchi, Gaku Kimura, Rina Fukuchi, Saneatsu Saito, Jun Kameda, Yujin Kitamura, Koichiro Fujimoto and Yoshitaka Hashimoto
    Citation: Earth, Planets and Space 2015 67:30
    Content type: Full paper Published on:

  13. We explore the Rayleigh-wave phase-velocity structure beneath northern Vietnam over a broad period range of 5 to 250 s. We use the two-stations technique to derive the dispersion curves from the waveforms of 7...

    Authors: Cédric P Legendre, Li Zhao, Win-Gee Huang and Bor-Shouh Huang
    Citation: Earth, Planets and Space 2015 67:28
    Content type: Full paper Published on:

  14. The local vertical datum in Japan is based on the Helmert’s approximation of mean gravity along the plumbline. However, determination of a rigorous orthometric height requires that the integral-mean value of g...

    Authors: Patroba Achola Odera and Yoichi Fukuda
    Citation: Earth, Planets and Space 2015 67:27
    Content type: Full paper Published on:

  15. Although precursory signs of an earthquake can occur before the event, it is difficult to observe such signs with precision, especially on earth’s surface where artificial noise and other factors complicate si...

    Authors: Hiroshi Ishii and Yasuhiro Asai
    Citation: Earth, Planets and Space 2015 67:26
    Content type: Full paper Published on:

  18. Auroral microphysics still remains partly unexplored. Cutting-edge ground-based optical observations using scientific complementary metal-oxide semiconductor (sCMOS) cameras recently enabled us to observe the ...

    Authors: Ryuho Kataoka, Yoko Fukuda, Yoshizumi Miyoshi, Hiroko Miyahara, Satoru Itoya, Yusuke Ebihara, Donald Hampton, Hanna Dahlgren, Daniel Whiter and Nickolay Ivchenko
    Citation: Earth, Planets and Space 2015 67:23
    Content type: Frontier letter Published on:

  19. We describe an automated technique to determine parameters of traveling ionospheric disturbances (TIDs) using the Super Dual Auroral Radar Network (SuperDARN) high frequency (HF) radar data. The technique is b...

    Authors: Alexey V Oinats, Vladimir I Kurkin and Nozomu Nishitani
    Citation: Earth, Planets and Space 2015 67:22
    Content type: Letter Published on:

  20. Chorus wave emissions are one of the most intense naturally occurring phenomena in the very low (VLF) and extremely low frequency (ELF) ranges. They are believed to be one of the major contributors to accelera...

    Authors: Claudia Martinez-Calderon, Kazuo Shiokawa, Yoshizumi Miyoshi, Mitsunori Ozaki, Ian Schofield and Martin Connors
    Citation: Earth, Planets and Space 2015 67:21
    Content type: FULL PAPER Published on:

  21. Three category 3 (organic) particles (RB-QD04-0001, RB-QD04-0047-02, and RA-QD02-0120) and so-called ‘white object’ found in the sample container have been examined by micro-Raman and infrared (IR) spectroscop...

    Authors: Fumio Kitajima, Masayuki Uesugi, Yuzuru Karouji, Yukihiro Ishibashi, Toru Yada, Hiroshi Naraoka, Masanao Abe, Akio Fujimura, Motoo Ito, Hikaru Yabuta, Hajime Mita, Yoshinori Takano and Tatsuaki Okada
    Citation: Earth, Planets and Space 2015 67:20
    Content type: Letter Published on:

  22. The height-time-concentration map of neutral sodium (Na) atoms measured by a Na lidar during the night of 18 to 19 March 2007 over Gadanki, India (13.5° N, 79.2° E) reveals an unusual structure in the Na layer...

    Authors: Sumanta Sarkhel, John D Mathews, Shikha Raizada, Ramanathan Sekar, Dibyendu Chakrabarty, Amitava Guharay, Geonhwa Jee, Jeong-Han Kim, Robert B Kerr, Geetha Ramkumar, Sundararajan Sridharan, Qian Wu, Martin G Mlynczak and James M Russell III
    Citation: Earth, Planets and Space 2015 67:19
    Content type: Full paper Published on:

    The Erratum to this article has been published in Earth, Planets and Space 2015 67:145

  23. This study investigates the impact of dynamical processes in the neutral atmosphere on the high-midlatitude ionosphere during two sudden stratospheric warming (SSW) events. For this purpose, the reanalysis met...

    Authors: Boris G Shpynev, Vladimir I Kurkin, Konstantin G Ratovsky, Marina A Chernigovskaya, Anastasiya Yu Belinskaya, Svetlana A Grigorieva, Alexander E Stepanov, Vasily V Bychkov, Dora Pancheva and Plamen Mukhtarov
    Citation: Earth, Planets and Space 2015 67:18
    Content type: Letter Published on:

  24. Borehole breakouts are enlargements and elongation of a borehole in a particular direction, caused by failure of the borehole wall rock due to concentration of stresses around the borehole, and thus, have been...

    Authors: Yasuhiro Yamada and Jun Shibanuma
    Citation: Earth, Planets and Space 2015 67:17
    Content type: Letter Published on:

  25. At Integrated Ocean Drilling Program (IODP) Site C0008 in the Nankai Trough slope sediment, we discovered in situ temperature anomalies at 80 to 160 m below the seafloor, where pore fluid Cl and δ ...

    Authors: Masataka Kinoshita, Hiroaki Fukase, Shusaku Goto and Tomohiro Toki
    Citation: Earth, Planets and Space 2015 67:16
    Content type: Letter Published on:

  26. Based on the spherical harmonic expansion of geomagnetic disturbance observed on the mid-latitude surface of the Earth, external and internal field separation is conducted in which the external component is ma...

    Authors: Dan Xu, Huaran Chen and Mengtan Gao
    Citation: Earth, Planets and Space 2015 67:15
    Content type: Full paper Published on:

  27. This paper describes a new method for tracing paleo-shear zones of the continental crust by self-potential (SP) data inversion. The method falls within the deterministic inversion framework, and it is exclusiv...

    Authors: Salah A Mehanee
    Citation: Earth, Planets and Space 2015 67:14
    Content type: FULL PAPER Published on:

  29. The data from the analysis of samples returned by Hayabusa from asteroid 25143 Itokawa are used to constrain the preaccretion history, the geological activity that occurred after accretion, and the dynamical h...

    Authors: Harold C Connolly Jr, Dante S Lauretta, Kevin J Walsh, Shogo Tachibana and William F Bottke Jr
    Citation: Earth, Planets and Space 2015 67:12
    Content type: Letter Published on:

  30. The author has developed a new leveling method for use with magnetic survey data, which consists of adjusting each measurement using the weighted spatial average of its neighboring data and subsequent temporal...

    Authors: Takemi Ishihara
    Citation: Earth, Planets and Space 2015 67:11
    Content type: Full paper Published on:

  31. We study if and how the South Atlantic Anomaly influences the ionospheric solar quiet (Sq) current system. Geomagnetically quiet days are processed for the years 1990 and 2011, and the Sq foci tracks are analy...

    Authors: Stephan Koch and Alexey Kuvshinov
    Citation: Earth, Planets and Space 2015 67:10
    Content type: FULL PAPER Published on:

  32. This study is focused to investigate the Pc5 geomagnetic pulsations in response to the solar wind forcing and their relationship with the relativistic electron flux at geostationary orbit. We analyzed the corr...

    Authors: Mauro Regi, Marcello De Lauretis and Patrizia Francia
    Citation: Earth, Planets and Space 2015 67:9
    Content type: Full paper Published on:

  34. We determined the seismic attenuation structure of the Kumano Basin, a forearc basin in the central part of the Nankai subduction zone. Despite its importance for understanding the physical condition of the Ea...

    Authors: Ryota Hino, Takeshi Tsuji, Nathan L Bangs, Yoshinori Sanada, Jin-Oh Park, Roland von Huene, Gregory F Moore, Eiichiro Araki and Masataka Kinoshita
    Citation: Earth, Planets and Space 2015 67:7
    Content type: Frontier letter Published on:

  35. This study focuses on the results of an audio-frequency magnetotelluric (AMT) survey across the Jigokudani valley, Tateyama volcano, Japan, to investigate the spatial relationship between the distribution of e...

    Authors: Kaori Seki, Wataru Kanda, Yasuo Ogawa, Toshiya Tanbo, Tomokazu Kobayashi, Yuta Hino and Hideaki Hase
    Citation: Earth, Planets and Space 2015 67:6
    Content type: LETTER Published on:

  36. Mineralogy of three LL chondrites including Y-981971, Y-793214, and Y-790782 indicates that granulitic materials may have been formed in some depth of their parent body by an impact event. This process of high...

    Authors: Hiroshi Takeda, Hiroshi Nagaoka, Akira Yamaguchi, Yuzuru Karouji and Yuuki Yazawa
    Citation: Earth, Planets and Space 2015 67:5
    Content type: Letter Published on:

  37. The development of real-time tsunami forecast and rapid tsunami warning systems is crucial in order to mitigate tsunami disasters. The present study shows that tsunami prediction from a seismic centroid moment...

    Authors: Takayuki Miyoshi, Tatsuhiko Saito, Daisuke Inazu and Sachiko Tanaka
    Citation: Earth, Planets and Space 2015 67:4
    Content type: Letter Published on:

  39. This paper presents an overview of the capacity-building activities and science-enabling services of the Inter-university Upper atmosphere Global Observation NETwork (IUGONET) project. This Japanese program, w...

    Authors: Akiyo Yatagai, Yuka Sato, Atsuki Shinbori, Shuji Abe and Satoru UeNo
    Citation: Earth, Planets and Space 2015 67:2
    Content type: Technical report Published on:

  40. In this paper, we investigate the role of eastward and upward propagating fast (FK) and ultrafast Kelvin (UFK) waves in the day-to-day variability of equatorial evening prereversal vertical drift and post suns...

    Authors: Mangalathayil A Abdu, Christiano GM Brum, Paulo P Batista, Subramanian Gurubaran, Dora Pancheva, Jose V Bageston, Inez S Batista and Hisao Takahashi
    Citation: Earth, Planets and Space 2015 67:1
    Content type: Full paper Published on:

  41. 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:

  42. Electric fields induced in the conducting Earth by geomagnetic disturbances drive currents in power transmission grids, telecommunication lines or buried pipelines, which can cause service disruptions. A key s...

    Authors: Christoph Püthe, Chandrasekharan Manoj and Alexey Kuvshinov
    Citation: Earth, Planets and Space 2014 66:162
    Content type: FULL PAPER Published on:

  43. We report the results of detailed mineralogical investigations by analytical scanning and transmission electron microscopy of particle RA-QD02-0115 recovered from the surface of asteroid 25143 Itokawa. We divi...

    Authors: Dennis Harries and Falko Langenhorst
    Citation: Earth, Planets and Space 2014 66:163
    Content type: Letter Published on:

  45. Characteristics of long-term variation in the amplitude of solar quiet (Sq) geomagnetic field daily variation have been investigated using 1-h geomagnetic field data obtained from 69 geomagnetic observation st...

    Authors: Atsuki Shinbori, Yukinobu Koyama, Masahito Nose, Tomoaki Hori, Yuichi Otsuka and Akiyo Yatagai
    Citation: Earth, Planets and Space 2014 66:155
    Content type: Full paper Published on:

  47. 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:

  48. We analyzed the 3-D resistivity structure beneath Naruko volcano, northeastern Japan, with the aim of imaging 3-D distribution of fluids in the crust for its volcanic and seismogenic implications. The data wer...

    Authors: Yasuo Ogawa, Masahiro Ichiki, Wataru Kanda, Masaaki Mishina and Koichi Asamori
    Citation: Earth, Planets and Space 2014 66:158
    Content type: Letter Published on:

  49. The ionosonde observations made at 5-min intervals at the Indian dip equatorial station Tirunelveli (8.7°N, 77.8°E geographic; 1.1°N dip latitude) from March 2008 to February 2009 during the extended solar min...

    Authors: Viswanathan Lakshmi Narayanan, Sukanta Sau, Subramanian Gurubaran, Kazuo Shiokawa, Nanan Balan, Kaliappan Emperumal and Samireddipalle Sripathi
    Citation: Earth, Planets and Space 2014 66:160
    Content type: Full paper Published on:

  50. Analyses with a scanning transmission x-ray microscope (STXM) using x-ray absorption near edge structure (XANES) spectroscopy were applied for the molecular characterization of two kinds of carbonaceous partic...

    Authors: Hikaru Yabuta, Masayuki Uesugi, Hiroshi Naraoka, Motoo Ito, A L David Kilcoyne, Scott A Sandford, Fumio Kitajima, Hajime Mita, Yoshinori Takano, Toru Yada, Yuzuru Karouji, Yukihiro Ishibashi, Tatsuaki Okada and Masanao Abe
    Citation: Earth, Planets and Space 2014 66:156
    Content type: Letter Published on:
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