Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Koki AIZAWA"'
Publikováno v:
Earth, Planets and Space, Vol 75, Iss 1, Pp 1-18 (2023)
Abstract From April to July 2021, West Crater at Iwo-Yama, Kirishima Volcanic Complex, Japan, was repeatedly filled with hydrothermal water and subsequently evacuated. The overall cycle lasted 14–70 h, and the course of a single cycle followed this
Externí odkaz:
https://doaj.org/article/d19488aba33448dc98a060c899d789ea
Publikováno v:
Communications Earth & Environment, Vol 3, Iss 1, Pp 1-9 (2022)
Electric field changes generated by the movement of shallow groundwater can be regarded as a precursor to phreatic volcanic eruptions, according to near-vent geophysical observations of Iwo-Yama volcano in the Kirishima complex, Japan.
Externí odkaz:
https://doaj.org/article/69e891fc8fc94ef68034d51edfd58d13
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
Abstract Subsurface structures may control the migration of magma beneath a volcano. We used high-resolution seismic tomography to image a low- P-wave velocity (Vp) zone beneath Unzen Volcano, Japan, at depths of 3–16 km beneath sea level. The top
Externí odkaz:
https://doaj.org/article/92a0fe0d621a4a5cb4efb33f5ac11d54
Autor:
Koki Aizawa, Shinichi Takakura, Hisafumi Asaue, Katsuaki Koike, Ryokei Yoshimura, Ken’ichi Yamazaki, Shintaro Komatsu, Mitsuru Utsugi, Hiroyuki Inoue, Kaori Tsukamoto, Makoto Uyeshima, Takao Koyama, Wataru Kanda, Tohru Yoshinaga, Nobuo Matsushima, Kazunari Uchida, Yuko Tsukashima, Takeshi Matsushima, Hiroshi Ichihara, Dan Muramatsu, Yoshiko Teguri, Azusa Shito, Satoshi Matsumoto, Hiroshi Shimizu
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-12 (2021)
Abstract Crustal earthquake ruptures tend to initiate near fluid-rich zones. However, it is relatively unknown whether fluid-rich zones can further promote or arrest these ruptures. We image the electrical resistivity structure around the focal area
Externí odkaz:
https://doaj.org/article/6acd1be115b24e069e30dddacf443228
Autor:
Yao-Chong Sun, Makoto Uyeshima, Hengxin Ren, Qinghua Huang, Koki Aizawa, Kaori Tsukamoto, Wataru Kanda, Kaori Seki, Takahiro Kishita, Takao Ohminato, Atsushi Watanabe, Jiangjun Ran, Xiaofei Chen
Publikováno v:
Earth, Planets and Space, Vol 71, Iss 1, Pp 1-24 (2019)
Abstract Coseismic electromagnetic (EM) signals that appear from the P arrival were observed in a volcanic area during the 2016 Kumamoto earthquake. In this study, we conduct numerical simulations to explain the coseismic EM signals observed for a M5
Externí odkaz:
https://doaj.org/article/ee9dbc5c985d4d70b9ab1399887f9bc0
Autor:
Agnis Triahadini, Koki Aizawa, Yoshiko Teguri, Takao Koyama, Kaori Tsukamoto, Dan Muramatsu, Keita Chiba, Makoto Uyeshima
Publikováno v:
Earth, Planets and Space, Vol 71, Iss 1, Pp 1-13 (2019)
Abstract We conducted a broadband magnetotelluric (MT) survey along a north–south transect across Unzen graben, Japan. The MT survey line is located ~ 2 km west of the most recent lava dome and consisted of 27 stations along a 9-km profile. We esti
Externí odkaz:
https://doaj.org/article/6a16a47c53604dc793eb9b6b6b478d39
Autor:
Agnis Triahadini, Koki Aizawa, Tasuku M Hashimoto, Keita Chiba, Kazunari Uchida, Yuto Yamamoto, Kanta Miyano, Dan Muramatsu, Satoru Aniya, Ayumu Okubo, Yuta Kawamura
Publikováno v:
Geophysical Journal International. 234:1268-1281
SUMMARY Unzen volcano, located on Shimabara Peninsula, Nagasaki, Japan, is an active volcano that has been intensively monitored since 1989, one year before the most recent eruption in 1990–1995. Previous earthquake and surface deformation studies
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f1ff1af86cdb9f33a8958dc3fbe775c
https://doi.org/10.1093/gji/ggad126
https://doi.org/10.1093/gji/ggad126
From April to July 2021, West Crater at Iwo-Yama, Kirishima Volcanic Complex, Japan, was repeatedly filled with hydrothermal water and subsequently evacuated. The overall cycle lasted 14–70 h, and the course of a single cycle followed this sequence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a8837f31864f5af0a6cb7098e87f104
https://doi.org/10.21203/rs.3.rs-2145565/v1
https://doi.org/10.21203/rs.3.rs-2145565/v1
Autor:
Haruhiro Inagaki, Makoto Uyeshima, Mitsuru Utsugi, Hiroki Saito, Yasuhiro Fujimitsu, Keigo Kitamura, Koki Aizawa, Takao Koyama, Nobuo Matsushima, Shinichi Takakura
Publikováno v:
Geophysical Journal International. 228:755-772
SUMMARYMagnetotelluric (MT) observations have revealed subvertical electrical conductors that extend from shallow depths into the mid-crust at various geothermal zones, active volcanoes and active faults worldwide. These deeply rooted subvertical con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b717667d4d9c0e7b53de6d99945a0882
https://doi.org/10.1093/gji/ggab368
https://doi.org/10.1093/gji/ggab368
Publikováno v:
Journal of Robotics and Mechatronics. 32:1000-1009
In robotic surgery, the load exerted on the insertion port in the patient’s abdominal wall due to misalignment of the robot’s remote center of motion and the insertion port or external forces acting on the tip of the forceps during surgery, can n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97b419cd6a0a374f2068c0b89caaed21
https://doi.org/10.20965/jrm.2020.p1000
https://doi.org/10.20965/jrm.2020.p1000