Detections of sub-micro-gal gravity changes associated with earthquakes and volcanism, revealed by precise corrections of hydrological gravity disturbances
Project/Area Number |
25887035
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Research Category |
Grant-in-Aid for Research Activity Start-up
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Allocation Type | Single-year Grants |
Research Field |
Solid earth and planetary physics
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Research Institution | Kyoto University |
Principal Investigator |
KAZAMA Takahito 京都大学, 理学(系)研究科(研究院), 助教 (20700363)
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Project Period (FY) |
2013-08-30 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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Keywords | 重力観測 / 地震 / 火山活動 / 陸水擾乱 / 桜島 / 浅間山 / 地下水 / 土壌水分 / 火山噴火 / 重力変化 / 阿蘇山 / 地殻変動 / 火山 / 噴火 / 陸水 / アラスカ |
Outline of Final Research Achievements |
In order to obtain gravity changes associated with spatiotemporal mass variations due to earthquakes and volcanic activities, we corrected observed gravity data for hydrological gravity disturbances with a high degree of precision. For Sakurajima Volcano, we reproduced the hydrological disturbances of the observed relative gravity data within 8 micro-gal, using an empirical hydrological model. For Asama Volcano, we retrieved the 5-micro-gal gravity signal due to magma movement during the 2004 eruptions, by correcting the hydrological disturbances observed by absolute gravimeters using a physical hydrological model. Gravity measurements will enable us to monitor mass redistributions related to earthquakes and volcanism, by means of these hydrological models for the hydrological disturbance corrections.
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Report
(3 results)
Research Products
(20 results)
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[Journal Article] Gravity measurements with a portable absolute gravimeter A10 in Syowa Station and Langhovde, East Antarctica2013
Author(s)
T. Kazama, H. Hayakawa, T. Higashi, S. Ohsono, S. Iwanami, T. Hanyu, H. Ota, K. Doi, Y. Aoyama, Y. Fukuda, J. Nishijima, K. Shibuya
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Journal Title
Polar Science
Volume: 7
Issue: 3-4
Pages: 260-277
DOI
NAID
Related Report
Peer Reviewed
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[Journal Article] Absolute gravity variation at Sakurajima volcano from April 2009 through January 2011 and its relevance to the eruptive activity of Showa crater2013
Author(s)
S. Okubo, T. Kazama, K. Yamamoto, M. Iguchi, Y. Tanaka, T. Sugano, Y. Imanishi, W. Sun, M. Saka, A. Watanabe, S. Matsumoto
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Journal Title
Bulletin of the Volcanological Society of Japan
Volume: 58
Pages: 153-162
Related Report
Peer Reviewed
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[Journal Article] 南極昭和基地における絶対重力計FG5による重力測定と重力経年変化2013
Author(s)
東敏博, 土井浩一郎, 早河秀章, 風間卓仁, 太田晴美, 大薗伸吾, 羽入朋子, 岩波俊介, 青山雄一, 澁谷和雄, 福田洋一
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Journal Title
測地学会誌
Volume: 59
Pages: 37-43
NAID
Related Report
Peer Reviewed
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