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  1. 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

  2. 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

  3. Research article

    High-resolution mapping and time-series measurements of 222Rn concentrations and biogeochemical properties related to submarine groundwater discharge along the coast of Obama Bay, a semi-enclosed sea in Japan

    High-resolution mapping along the coast and time-series measurements of the radon-222 (222Rn) concentrations in the shallow zone in a semi-enclosed sea, Obama Bay, Japan, were undertaken in 2013. The temporal and...

    Shiho Kobayashi, Ryo Sugimoto, Hisami Honda, Yoji Miyata, Daisuke Tahara, Osamu Tominaga, Jun Shoji, Makoto Yamada, Satoshi Nakada and Makoto Taniguchi

    Progress in Earth and Planetary Science 2017 4:6

    Published on: 24 March 2017

  4. Research article

    ESR signal intensity of quartz in the fine-silt fraction of riverbed sediments from the Yangtze River: a provenance tracer for suspended particulate matter

    The Asian summer monsoon exerts a strong influence on the hydrologic cycle in East Asia. Moreover, the distribution of heavy precipitation in the Yangtze River basin, which covers a large area of South China, ...

    Keita Saito, Ryuji Tada, Hongbo Zheng, Tomohisa Irino, Chao Luo, Mengying He, Ke Wang and Yoshiaki Suzuki

    Progress in Earth and Planetary Science 2017 4:4

    Published on: 22 February 2017

  5. Research article

    Seismic and inter-seismic ground surface deformations of the Murono mud volcano (central Japan): a laser scanning approach

    A small mud volcano in Murono, Niigata Prefecture, north-central Japan, shows active ground surface displacements, not only when large earthquakes occur in the region but also during quiescent periods between ...

    Yuichi S. Hayakawa, Shigekazu Kusumoto and Nobuhisa Matta

    Progress in Earth and Planetary Science 2017 4:3

    Published on: 7 February 2017

  6. Research article

    Model depiction of the atmospheric flows of radioactive cesium emitted from the Fukushima Daiichi Nuclear Power Station accident

    In this study, a new method is proposed for the depiction of the atmospheric transportation of the 137Cs emitted from the Fukushima Daiichi Nuclear Power Station accident. This method employs a combination of the...

    Teruyuki Nakajima, Shota Misawa, Yu Morino, Haruo Tsuruta, Daisuke Goto, Junya Uchida, Toshihiko Takemura, Toshimasa Ohara, Yasuji Oura, Mitsuru Ebihara and Masaki Satoh

    Progress in Earth and Planetary Science 2017 4:2

    Published on: 23 January 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

    Reactions between komatiite and CO2-rich seawater at 250 and 350 °C, 500 bars: implications for hydrogen generation in the Hadean seafloor hydrothermal system

    To understand the chemical nature of hydrothermal fluids in the komatiite-hosted seafloor hydrothermal system in the Hadean, we conducted two hydrothermal serpentinization experiments involving synthetic komat...

    Hisahiro Ueda, Takazo Shibuya, Yusuke Sawaki, Masafumi Saitoh, Ken Takai and Shigenori Maruyama

    Progress in Earth and Planetary Science 2016 3:35

    Published on: 18 November 2016

  10. Review

    A review of atmospheric chemistry observations at mountain sites

    Located far from anthropogenic emission sources, high-altitude mountain stations are considered to be ideal sites for monitoring climatic and environmentally important baseline changes in free tropospheric tra...

    Sachiko Okamoto and Hiroshi Tanimoto

    Progress in Earth and Planetary Science 2016 3:34

    Published on: 26 October 2016

  11. Research article

    Retrieval of radiative and microphysical properties of clouds from multispectral infrared measurements

    Satellite remote sensing of the macroscopic, microphysical, and optical properties of clouds are useful for studying spatial and temporal variations of clouds at various scales and constraining cloud physical ...

    Hironobu Iwabuchi, Masanori Saito, Yuka Tokoro, Nurfiena Sagita Putri and Miho Sekiguchi

    Progress in Earth and Planetary Science 2016 3:32

    Published on: 21 October 2016

  12. 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

  13. 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

  14. 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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