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  • November 13, 2017

Performance of Akatsuki/IR2 in Venus orbit: the first year

It is essential for instruments, that work in space or at or near the target bodies, to be characterized under the actual operating conditions. Establishing the procedure of data processing is important as well. IR2, which cools its sensor and optics by a cryo-cooler, is affected in particular by thermal environment in the orbit. Satoh et al. (2017) made efforts to produce the data with best possible quality by understanding… Read more

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  • November 7, 2017

Near-Earth plasma sheet boundary dynamics during substorm dipolarization

Nakamura et al. (2017) report on the evolution of the near-Earth plasma sheet boundary during an intense substorm. Based on multi-point analysis using the four-spacecraft measurements from Magnetospheric Multiscale (MMS) together with Geotail and GOES spacecraft and comparison with MHD model of the reconnection jet, spatial structure of the high-speed plasma flows and associated field-aligned current pattern are deduced. It is shown that the dynamics in the boundary region of the near-Earth plasma sheet are controlled both by the Earthward flow braking process and by the accumulated magnetic flux due to near-Earth reconnection evolving tailward. Click to view the article Read more

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  • August 21, 2017

Volcanic activity on Io and its influence on the dynamics of the Jovian magnetosphere observed by EXCEED/Hisaki in 2015

Jupiter's moon Io, which orbits deep inside the magnetosphere, is the most geologically active object in the solar system. Kurdalagon Patera, a volcano on Io, erupted in 2015 and became a substantial source of Jovian magnetospheric plasma. Based on Earth-orbiting spacecraft observations, Io plasma torus (IPT) exhibited the peak intensity (nearly double) of ionic sulfur emissions roughly 2 month later, followed by a decay phase. This environmental change provides a… Read more

  • News
  • August 18, 2017

Deadline for submissions extended to 31 December: “Towards Forecasting Phreatic Eruptions: Examples from Hakone Volcano and some Global Equivalents”

The deadline for submissions has been extended to 31 December 2017. More information for this special issue can be found via the following link. “Towards Forecasting Phreatic Eruptions: Examples from Hakone Volcano and some Global Equivalents” Read more

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  • August 17, 2017

Vice Editor-in-Chief introduces EPS in AOGS Annual Meeting 2017

Vice Editor-in-chief, Nozomu Nishitani, introduced about EPS in “Innovation Theatre” of AOGS Annual Meeting 2017. Abstract Read more