4. Solid earth sciences

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  1. Research article

    Spatial pattern in stress drops of moderate-sized earthquakes on the Pacific Plate off the south-east of Hokkaido, Japan: implications for the heterogeneity of frictional properties

    We show that the spatial heterogeneity in the coseismic displacement of large earthquakes likely reflects the spatial characteristics of the frictional properties and that it can be inferred from the stress dr...

    Takuji Yamada, Yu Saito, Yuichiro Tanioka and Jun Kawahara

    Progress in Earth and Planetary Science 2017 4:38

    Published on: 13 December 2017

  2. Research article

    Melting phase relations in the MgSiO3–CaSiO3 system at 24 GPa

    The Earth’s lower mantle is composed of bridgmanite, ferropericlase, and CaSiO3-rich perovskite. The melting phase relations between each component are key to understanding the melting of the Earth’s lower mantle...

    Ryuichi Nomura, Youmo Zhou and Tetsuo Irifune

    Progress in Earth and Planetary Science 2017 4:34

    Published on: 28 November 2017

  3. Research article

    Adjoint tomography of the crust and upper mantle structure beneath the Kanto region using broadband seismograms

    A three-dimensional seismic wave speed model in the Kanto region of Japan was developed using adjoint tomography for application in the effective reproduction of observed waveforms. Starting with a model based...

    Takayuki Miyoshi, Masayuki Obayashi, Daniel Peter, Yoko Tono and Seiji Tsuboi

    Progress in Earth and Planetary Science 2017 4:29

    Published on: 3 October 2017

  4. Research article

    Possible climate preconditioning on submarine landslides along a convergent margin, Nankai Trough (NE Pacific)

    Submarine landslides are major agents of sediment mass transfer from the shallow to deep sea. Due to their rapid emplacement and tsunamigenic potential, such landslides are significant geohazards for society a...

    Katrina Kremer, Muhammed O. Usman, Yasufumi Satoguchi, Yoshitaka Nagahashi, Sunil Vadakkepuliyambatta, Giuliana Panieri and Michael Strasser

    Progress in Earth and Planetary Science 2017 4:20

    Published on: 25 July 2017

  5. Research article

    Melting relations in the Fe–S–Si system at high pressure and temperature: implications for the planetary core

    The phase and melting relations in the Fe–S–Si system were determined up to 60 GPa by using a double-sided laser-heated diamond anvil cell combined with X-ray diffraction. On the basis of the X-ray diffraction...

    Takanori Sakairi, Eiji Ohtani, Seiji Kamada, Takeshi Sakai, Tatsuya Sakamaki and Naohisa Hirao

    Progress in Earth and Planetary Science 2017 4:10

    Published on: 31 March 2017

  6. Research article

    Hydrogen mobility in transition zone silicates

    We study the hydrogen mobility in ringwoodite and wadsleyite considering multiple charge-balanced defects, including Mg < = > 2H, Si < = > Mg + 2H, and the hydrogarnet defect, Si < = > 4H, using molecular dyna...

    Razvan Caracas and Wendy R. Panero

    Progress in Earth and Planetary Science 2017 4:9

    Published on: 29 March 2017

  7. Research article

    Interplay of irreversible reactions and deformation: a case of hydrofracturing in the rodingite–serpentinite system

    The interplay of irreversible reactions and deformation during regional metamorphism was analyzed in the reaction zones between rodingite and serpentinite. Rodingites are leucocratic rocks found commonly in se...

    Tadao Nishiyama, Chisato Yoshida- Shiosaki, Yasushi Mori and Miki Shigeno

    Progress in Earth and Planetary Science 2017 4:1

    Published on: 16 January 2017

  8. Research article

    Estimation of seismic velocity changes at different depths associated with the 2014 Northern Nagano Prefecture earthquake, Japan (M W 6.2) by joint interferometric analysis of NIED Hi-net and KiK-net records

    To estimate the seismic velocity changes at different depths associated with a large earthquake, we apply passive image interferometry to two types of seismograms: KiK-net vertical pairs of earthquake records ...

    Kaoru Sawazaki, Tatsuhiko Saito, Tomotake Ueno and Katsuhiko Shiomi

    Progress in Earth and Planetary Science 2016 3:36

    Published on: 22 November 2016

  9. Research article

    Reconstruction of a 2D seismic wavefield by seismic gradiometry

    We reconstructed a 2D seismic wavefield and obtained its propagation properties by using the seismic gradiometry method together with dense observations of the Hi-net seismograph network in Japan. The seismic ...

    Takuto Maeda, Kiwamu Nishida, Ryota Takagi and Kazushige Obara

    Progress in Earth and Planetary Science 2016 3:31

    Published on: 10 October 2016

    The Erratum to this article has been published in Progress in Earth and Planetary Science 2016 3:37

  10. Research article

    Determination of temporal changes in seismic velocity caused by volcanic activity in and around Hakone volcano, central Japan, using ambient seismic noise records

    Autocorrelation functions (ACFs) for ambient seismic noise are considered to be useful tools for estimating temporal changes in the subsurface structure. Velocity changes at Hakone volcano in central Japan, wh...

    Yohei Yukutake, Tomotake Ueno and Kazuki Miyaoka

    Progress in Earth and Planetary Science 2016 3:29

    Published on: 27 September 2016

  11. Research article

    A record of the upper Olduvai geomagnetic polarity transition from a sediment core in southern Yokohama City, Pacific side of central Japan

    A detailed paleomagnetic record of the upper Olduvai polarity transition was obtained from a 106.72 m-long sediment core drilled in southern Yokohama City, located on the northern Miura Peninsula, on the Pacif...

    Chie Kusu, Makoto Okada, Atsushi Nozaki, Ryuichi Majima and Hideki Wada

    Progress in Earth and Planetary Science 2016 3:26

    Published on: 23 September 2016

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