Results 41 to 50 of about 337 (152)

Characteristics of Deep Long‐Period Earthquakes at Alaska Volcanoes From 2005 to 2017

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 6, June 2025.
Abstract Deep long‐period earthquakes (DLPs) are often detected near volcanoes from the crust down to the upper mantle. Exhibiting coincidence with volcanic eruptions, DLPs are recognized as potential precursors to volcanic activities yet their detection remains challenging.
Zilin Song, Yen Joe Tan
wiley   +1 more source

Source constraints for the 2015 phreatic eruption of Hakone volcano, Japan, based on geological analysis and resistivity structure

Earth, Planets and Space, 2019
On June 29, 2015, a small phreatic eruption occurred in the most intensively steaming area of Hakone volcano, Japan. A previous magnetotelluric survey for the whole volcano revealed that the eruption center area (ECA) was located near the apex of a bell ...
Kazutaka Mannen, Toshikazu Tanada, Akira Jomori, Takashi Akatsuka, George Kikugawa, Yui Fukazawa, Hiroyuki Yamashita, Koichiro Fujimoto   +7 more
doaj   +1 more source

InSAR analysis for detecting the route of hydrothermal fluid to the surface during the 2015 phreatic eruption of Hakone Volcano, Japan

Earth, Planets and Space, 2018
Although the 2015 Hakone Volcano eruption was a small-scale phreatic eruption with a discharged mass of only about 100 tons, interferometric synthetic aperture radar successfully detected surface deformations related to the eruption.
Ryosuke Doke, Masatake Harada, Kazutaka Mannen, Kazuhiro Itadera, Jun Takenaka   +4 more
doaj   +1 more source

Precursory ground deformation of the 2018 phreatic eruption on Iwo-Yama volcano, revealed by four-dimensional joint analysis of airborne and spaceborne InSAR

Earth, Planets and Space, 2020
We present detailed maps of local-scale 3D deformation preceding the 2018 phreatic eruption at Iwo-yama volcano (south of Kyushu Island, Japan), using a combination of airborne and spaceborne Interferometric Synthetic Aperture Radar (InSAR) data.
Shohei Narita, Taku Ozawa, Yosuke Aoki, Masanobu Shimada, Masato Furuya, Youichiro Takada, Makoto Murakami   +6 more
doaj   +1 more source

Aluminum dynamics in nitrogen‐saturated Andisols in Tokyo

Ecological Research, Volume 40, Issue 3, Page 293-302, May 2025.
Atmospheric nitrogen (N) deposition in throughfall has decreased in forests around the Tokyo metropolitan area. The present study was conducted to elucidate the effect of decreased nitrogen deposition on aluminum (Al) dynamics in a forested allophanic Andisols. Mobilization of Al tended to decrease, in particular in the Japanese cedar stand.
Mitsuhisa Baba, Masanori Okazaki, Yuko Itoh, Kazuhide Matsuda, Fuka Tachiyanagi, Koki Toyota   +5 more
wiley   +1 more source

A Case of Polyarteritis Nodosa Associated with Cytomegalovirus Infection

Case Reports in Rheumatology, 2014
A 77-year-old man suffering from prolonged fever of unknown origin and bilateral leg edema was referred to our hospital. On physical examination, he had fever, general fatigue, bilateral lower leg edema, and muscle weakness of the right upper extremity ...
Maiko Kouchi, Shinji Sato, Masahiro Kamono, Akiko Taoda, Kazuyuki Iijima, Atsushi Mizuma, Ruriko Kitao, Masatoshi Mihara, Hideki Ozawa, Tadayuki Ishihara, Atsushi Takagi, Yasuo Suzuki   +11 more
doaj   +1 more source

Quasar Luminosity Function at z = 7

The Astrophysical Journal Letters, 2023
We present the quasar luminosity function (LF) at z = 7, measured with 35 spectroscopically confirmed quasars at 6.55 < z < 7.15. The sample of 22 quasars from the Subaru High- z Exploration of Low-Luminosity Quasars (SHELLQs) project, combined with 13 ...
Yoshiki Matsuoka, Masafusa Onoue, Kazushi Iwasawa, Michael A. Strauss, Nobunari Kashikawa, Takuma Izumi, Tohru Nagao, Masatoshi Imanishi, Masayuki Akiyama, John D. Silverman, Naoko Asami, James Bosch, Hisanori Furusawa, Tomotsugu Goto, James E. Gunn, Yuichi Harikane, Hiroyuki Ikeda, Kohei Inayoshi, Rikako Ishimoto, Toshihiro Kawaguchi, Satoshi Kikuta, Kotaro Kohno, Yutaka Komiyama, Chien-Hsiu Lee, Robert H. Lupton, Takeo Minezaki, Satoshi Miyazaki, Hitoshi Murayama, Atsushi J. Nishizawa, Masamune Oguri, Yoshiaki Ono, Taira Oogi, Masami Ouchi, Paul A. Price, Hiroaki Sameshima, Naoshi Sugiyama, Philip J. Tait, Masahiro Takada, Ayumi Takahashi, Tadafumi Takata, Masayuki Tanaka, Yoshiki Toba, Shiang-Yu Wang, Takuji Yamashita   +43 more
doaj   +1 more source

Engineering systems analysis of mobility in Odawara city: New transportation services impacts on community engagement

Systems Engineering, Volume 27, Issue 3, Page 499-519, May 2024.
Abstract Local cities in Japan are struggling with aging and decreasing populations. Elderly people and parents with young children are uniquely challenged when accessing public transportation, a key to increasing their community engagement and improving local cities' sustainability.
Keiji Kimura, Bryan R. Moser
wiley   +1 more source

Spatiotemporal Variations and Postseismic Relaxation Process Around Mt. Fuji, Japan, During and After the 2011 Tohoku‐Oki Earthquake

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 2, February 2024.
Abstract To monitor the volcanoes at a high spatiotemporal resolution, we introduce the singular value decomposition‐based Wiener filter and the three‐component waveforms in ambient noise velocity monitoring. The continuous ambient noise data from 63 stations around Mt. Fuji and Mt.
Y. Kakiuchi, H. Nimiya, T. Tsuji
wiley   +1 more source

Quantitative evaluation of volcanic activity at Hakone Volcano, Japan, based on multiple observational datasets: application of the Volcanic Unrest Index

Earth, Planets and Space
Various phenomena occur in volcanic areas, including volcanic earthquakes, crustal deformation, and volcanic gas emissions. Observations are commonly conducted to understand this diverse activity; however, it is challenging even for experts to interpret ...
Ryo Kurihara, Kazutaka Mannen, Kotaro Toyama, Ryou Honda, Yuki Abe, Yutaka Nagaoka, George Kikugawa, Yuji Miyashita, Kazuhiro Itadera   +8 more
doaj   +1 more source