1. Geomagnetism

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  1. 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

  2. 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

  3. 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

  4. 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

  5. Full paper

    Probing Earth’s conductivity structure beneath oceans by scalar geomagnetic data: autonomous surface vehicle solution

    The electric conductivity distribution of the Earth’s crust and upper mantle provides a key to unraveling its structure. Information can be obtained from vector data time series of the natural variations of th...

    Alexey Kuvshinov, Jürgen Matzka, Benny Poedjono, Friedemann Samrock, Nils Olsen and Sudhir Pai

    Earth, Planets and Space 2016 68:189

    Published on: 22 November 2016

  6. Technical report

    Scanning SQUID microscope system for geological samples: system integration and initial evaluation

    We have developed a high-resolution scanning superconducting quantum interference device (SQUID) microscope for imaging the magnetic field of geological samples at room temperature. In this paper, we provide d...

    Hirokuni Oda, Jun Kawai, Masakazu Miyamoto, Isoji Miyagi, Masahiko Sato, Atsushi Noguchi, Yuhji Yamamoto, Jun-ichi Fujihira, Nobuyoshi Natsuhara, Yoshiyasu Aramaki, Takashige Masuda and Chuang Xuan

    Earth, Planets and Space 2016 68:179

    Published on: 12 November 2016

  7. Full paper

    Estimating ionospheric currents by inversion from ground-based geomagnetic data and calculating geoelectric fields for studies of geomagnetically induced currents

    This research focuses on the inversion of geomagnetic variation field measurements to obtain the source currents in the ionosphere and magnetosphere, and to determine the geoelectric fields at the Earth’s surf...

    J. S. de Villiers, R. J. Pirjola and P. J. Cilliers

    Earth, Planets and Space 2016 68:154

    Published on: 9 September 2016

  8. Letter

    A Swarm lithospheric magnetic field model to SH degree 80

    The Swarm constellation of satellites was launched in November 2013 and since then has delivered high-quality scalar and vector magnetic field measurements. A consortium of several research institutions was se...

    Erwan Thébault, Pierre Vigneron, Benoit Langlais and Gauthier Hulot

    Earth, Planets and Space 2016 68:126

    Published on: 20 July 2016

  9. Full paper

    Recent geomagnetic secular variation from Swarm and ground observatories as estimated in the CHAOS-6 geomagnetic field model

    We use more than 2 years of magnetic data from the Swarm mission, and monthly means from 160 ground observatories as available in March 2016, to update the CHAOS time-dependent geomagnetic field model. The new mo...

    Christopher C. Finlay, Nils Olsen, Stavros Kotsiaros, Nicolas Gillet and Lars Tøffner-Clausen

    Earth, Planets and Space 2016 68:112

    Published on: 11 July 2016

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