1. Geomagnetism

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  1. Full paper

    Do ocean tidal signals influence recovery of solar quiet variations?

    The solar quiet (Sq) source morphology changes on a daily basis and becomes disturbed during periods of increased magnetic activity. Therefore, it may be preferable to use single-day magnetic field recordings ...

    Martina Guzavina, Alexander Grayver and Alexey Kuvshinov

    Earth, Planets and Space 2018 70:5

    Published on: 11 January 2018

  2. Express Letter

    Electrical conductivity of the global ocean

    The electrical conductivity of the ocean is a fundamental parameter in the electrodynamics of the Earth System. This parameter is involved in a number of applications ranging from the calibration of in situ oc...

    Robert H. Tyler, Tim P. Boyer, Takuto Minami, Melissa M. Zweng and James R. Reagan

    Earth, Planets and Space 2017 69:156

    Published on: 14 November 2017

  3. Express Letter

    Depth profiles of resistivity and spectral IP for active modern submarine hydrothermal deposits: a case study from the Iheya North Knoll and the Iheya Minor Ridge in Okinawa Trough, Japan

    Submarine hydrothermal deposits are one of the promising seafloor mineral resources, because they can store a large amount of metallic minerals as sulfides. The present study focuses on the electrical properti...

    Shogo Komori, Yuka Masaki, Wataru Tanikawa, Junji Torimoto, Yusuke Ohta, Masato Makio, Lena Maeda, Jun-ichiro Ishibashi, Tatsuo Nozaki, Osamu Tadai and Hidenori Kumagai

    Earth, Planets and Space 2017 69:114

    Published on: 16 August 2017

  4. Full paper

    Electrical conductivity of a locked fault: investigation of the Ganos segment of the North Anatolian Fault using three-dimensional magnetotellurics

    This study attempts to reveal the fault zone characteristics of the locked Ganos Fault based on electrical resistivity studies including audio-frequency (AMT: 10,400–1 Hz) and wide-band (MT: 360–0.000538 Hz) m...

    Mustafa Karaş, Sabri Bülent Tank and Sinan Özaydın

    Earth, Planets and Space 2017 69:107

    Published on: 15 August 2017

  5. Full paper

    Electrical conductivity of old oceanic mantle in the northwestern Pacific I: 1-D profiles suggesting differences in thermal structure not predictable from a plate cooling model

    Seafloor magnetotelluric (MT) experiments were recently conducted in two areas of the northwestern Pacific to investigate the nature of the old oceanic upper mantle. The areas are far from any tectonic activit...

    Kiyoshi Baba, Noriko Tada, Tetsuo Matsuno, Pengfei Liang, Ruibai Li, Luolei Zhang, Hisayoshi Shimizu, Natsue Abe, Naoto Hirano, Masahiro Ichiki and Hisashi Utada

    Earth, Planets and Space 2017 69:111

    Published on: 15 August 2017

  6. Full paper

    Automatic selection of Dst storms and their seasonal variations in two versions of Dst in 50 years

    A computer program is developed to automatically identify the geomagnetic storms in Dst index by applying four selection criteria that minimize non-storm-like fluctuations. The program is used to identify the ...

    N. Balan, S. Tulasiram, Y. Kamide, I. S. Batista, J. R. Souza, K. Shiokawa, P. K. Rajesh and N. J. Victor

    Earth, Planets and Space 2017 69:59

    Published on: 26 April 2017

  7. Letter

    Effect of a huge crustal conductivity anomaly on the H-component of geomagnetic variations recorded in central South America

    We describe here an analysis of the H-component of the geomagnetic field recorded in several temporary stations operating simultaneously in the central–eastern region of Brazil during nighttime pulsation even...

    Antonio L. Padilha, Livia R. Alves, Graziela B. D. Silva and Karen V. Espinosa

    Earth, Planets and Space 2017 69:58

    Published on: 26 April 2017

  8. Full paper

    Generation of billow-like wavy folds by fluidization at high temperature in Nojima fault gouge: microscopic and rock magnetic perspectives

    Microscopic billow-like wavy folds have been observed along slip planes of the Nojima active fault, southwest Japan. The folds are similar in form to Kelvin–Helmholtz (KH) instabilities occurring in fluids, wh...

    Tomohiko Fukuzawa, Norihiro Nakamura, Hirokuni Oda, Minoru Uehara and Hiroyuki Nagahama

    Earth, Planets and Space 2017 69:54

    Published on: 18 April 2017

  9. Full paper

    Paleomagnetic direction and paleointensity variations during the Matuyama–Brunhes polarity transition from a marine succession in the Chiba composite section of the Boso Peninsula, central Japan

    The youngest geomagnetic polarity reversal, the Matuyama–Brunhes (M–B) boundary, provides an important plane of data for sediments, ice cores, and lavas. The geomagnetic field intensity and directional changes...

    Makoto Okada, Yusuke Suganuma, Yuki Haneda and Osamu Kazaoka

    Earth, Planets and Space 2017 69:45

    Published on: 21 March 2017

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