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  • July 15, 2019

[Frontier Letter] Temporal variations in discharge rate and component characteristics of tephra-fall deposits during the 2014–2015 eruption of Nakadake first crater, Aso Volcano, Japan

Miyabuchi and Hara (2019) present the distribution, discharged mass, and components of tephra-fall deposits to examine the sequence and characteristics of the 2014-2015 magmatic eruption at Nakadake first crater, Aso Volcano, SW Japan. Continuous monitoring of tephra deposits and visual observation of eruptive phenomena combined with geophysical observations, would provide new insights into magmatic and eruptive processes on small but long-lasting activities at Nakadake Volcano and other similar basaltic to… Read more

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  • June 13, 2019

Highly Cited 14 Articles Published in EPS

Web of Science picked the following 14 articles published in EPS as "highly cited papers". As of January/February 2019, these highly cited papers received enough citations to place it in the top 1% of the academic field of Geosciences based on a highly cited threshold for the field and publication year. Don't miss spotlighted papers published in EPS! From Section 1. Geomagnetism Finlay et al. (2016): Recent geomagnetic secular variation… Read more

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  • June 2, 2019

[Frontier Letter] Constraining the magnetic properties of ultrafine- and fine-grained biogenic magnetite

Studies of biogenic magnetite and magnetotactic bacteria are gaining increasing prominence, spanning the disciplines of earth and planetary science and biological science. Zhang and Pan (2018) review the characterization of magnetite associated with magnetoferritins and magnetotactic bacteria. The former relates to important potential biomedical applications whereas the latter applies to the continued effort to define modern magnetotactic bacteria populations and magnetofossils in deep geologic time. This article was a contribution to the special issue of “Recent Advances in Geo-, Paleo- and Rock- Magnetism”. Read more

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  • February 27, 2019

[Frontier Letter] Imaging high-latitude plasma density irregularities resulting from particle precipitation: spaceborne L-band SAR and EISCAT observations

Particle precipitation represents an important source of irregular plasma density structures in the high-latitude ionosphere. Sato et al. (2018) used Synthetic Aperture Radar to image the small-scale plasma density irregularities under high levels of ionization of up to approximately 300 km over Tromsø, Norway. The irregular electron density is characterized by tens of kilometers of band-like structures aligned in the east-west direction with small patch-like structures. This study presents the… Read more

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  • November 29, 2018

[Frontier Letter] Paleomagnetic studies on single crystals separated from the middle Cretaceous Iritono granite

Granitic rocks could be good recorders of deep-time geomagnetic field behavior, but paleomagnetic measurements on whole-rock granitic samples are often disturbed by the presence of unstable multi-domain magnetite. Kato et al. (2018) demonstrated that single plagioclase crystals separated from granitic rocks can be reliable recorders of the geomagnetic paleointensity by a series of rock-magnetic measurements and Tsunakawa-Shaw paleointensity experiments on plagioclase crystals of the middle Cretaceous Iritono granite, for which… Read more

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  • October 1, 2018

[Frontier Letter] Volcanic smoke reduction in visible and thermal infrared imagery

Photographs are not what you see. When I (TH) was a student back in 1990s, I was always frustrated with the volcano pictures that I photographed because they somehow did not look like what I thought I really saw. It was often due to white smoke in front. So I used to prefer hand-sketching in which I can build a complete compilation of my observation for several minutes as a… Read more

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  • September 25, 2018

[Frontier Letter] Pyroclastic density currents associated with the 2015 phreatomagmatic eruption of the Kuchinoerabujima volcano

Though "low-temperature pyroclastic flow" is frequently observed with phreatic eruptions, there are few descriptions of its internal environment. The low-temperature pyroclastic flow of the 2015 eruption of Kuchinoerabujima volcano, southwestern Japan, provides geophysical data, video image, and geological descriptions of the deposits. The video image indicates that the velocity of flow exceeded 42 m/s. The dieback of the vegetation and deformation of some plastic materials in the flow, with absence… Read more

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