Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Yohei Yukutake"'
Publikováno v:
Earth, Planets and Space, Vol 75, Iss 1, Pp 1-17 (2023)
Abstract Volcanic earthquakes provide essential information for evaluating volcanic activity. Because volcanic earthquakes are often characterized by swarm-like features, conventional methods using manual picking require considerable time to construc
Externí odkaz:
https://doaj.org/article/a860cf4c98bd430997f235952790c056
Publikováno v:
Earth, Planets and Space, Vol 75, Iss 1, Pp 1-16 (2023)
Abstract Decades ago, Julian (J Volcanol Geotherm Res 101:19–26, 1994. https://doi.org/10.1029/93JB03129 ) proposed the lumped parameter model of non-linear excitation of an elastic channel vibration by fluid flow as a mechanism of volcanic harmoni
Externí odkaz:
https://doaj.org/article/2f58293d35cb452ca69f98605ea0599d
Publikováno v:
Earth, Planets and Space, Vol 75, Iss 1, Pp 1-15 (2023)
Abstract In volcanic regions, active earthquake swarms often occur in association with volcanic activity, and their rapid detection and analysis are crucial for volcano disaster prevention. Currently, these processes are ultimately left to human judg
Externí odkaz:
https://doaj.org/article/789fce1f4dd44c7aa8e0ac91ef1a5a96
Publikováno v:
Earth, Planets and Space, Vol 74, Iss 1, Pp 1-12 (2022)
Abstract The feeding system of magmatic fluid from the volcanic root to a shallow magma reservoir remains a poorly understood issue. Seismic events, including volcanic tremors and low-frequency earthquakes, in a deep part beneath volcanos are key obs
Externí odkaz:
https://doaj.org/article/03afdd122d2044b6828aca88023a17c0
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-12 (2021)
Abstract In the present study, we propose a new approach for determining earthquake hypocentral parameters. This approach integrates computed theoretical seismograms and deep machine learning. The theoretical seismograms are generated through a reali
Externí odkaz:
https://doaj.org/article/7eab5f75b58b419ea0c49ca8ebb4e171
Autor:
Kazutaka Mannen, Yuki Abe, Yasushi Daita, Ryosuke Doke, Masatake Harada, George Kikugawa, Naoki Honma, Yuji Miyashita, Yohei Yukutake
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-15 (2021)
Abstract Since the beginning of the twenty-first century, volcanic unrest has occurred every 2–5 years at Hakone volcano. After the 2015 eruption, unrest activity changed significantly in terms of seismicity and geochemistry. Like the pre- and co-e
Externí odkaz:
https://doaj.org/article/d03dddf9eb3541aa86760402f6833c7d
Publikováno v:
Frontiers in Physics, Vol 9 (2021)
Recent observation studies have revealed that earthquakes are classified into several different categories. Each category might be characterized by the unique statistical feature in the time series, but the present understanding is still limited due
Externí odkaz:
https://doaj.org/article/2b7cff5d81e9431d958df2d40f3862ce
Publikováno v:
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-14 (2018)
Abstract The 2015 unrest of the Hakone volcano in Japan, which began on April 26, generated earthquake swarms accompanied by long-term deformation. The earthquake swarm activity reached its maximum in mid-May and gradually calmed down; however, it in
Externí odkaz:
https://doaj.org/article/1f6e1dd3ef7c4e318fdec3c013b31257
Autor:
Ryokei Yoshimura, Yasuo Ogawa, Yohei Yukutake, Wataru Kanda, Shogo Komori, Hideaki Hase, Tada-nori Goto, Ryou Honda, Masatake Harada, Tomoya Yamazaki, Masato Kamo, Shingo Kawasaki, Tetsuya Higa, Takeshi Suzuki, Yojiro Yasuda, Masanori Tani, Yoshiya Usui
Publikováno v:
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-10 (2018)
Abstract On 29 June 2015, a small phreatic eruption occurred at Hakone volcano, Central Japan, forming several vents in the Owakudani geothermal area on the northern slope of the central cones. Intense earthquake swarm activity and geodetic signals c
Externí odkaz:
https://doaj.org/article/932ceb1e7ad940fe9ccf285bb02fb0a9
Autor:
Kazutaka Mannen, Yohei Yukutake, George Kikugawa, Masatake Harada, Kazuhiro Itadera, Jun Takenaka
Publikováno v:
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-26 (2018)
Abstract The 2015 eruption of Hakone volcano was a very small phreatic eruption, with total erupted ash estimated to be in the order of only 102 m3 and ballistic blocks reaching less than 30 m from the vent. Precursors, however, had been recognized a
Externí odkaz:
https://doaj.org/article/c44206d4025f4a778c348819f613c1b8