| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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タイトル |
Detection of microwave emission due to rock fracture as a new tool for geophysics: A field test at a volcano in Miyake Island, Japan |
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言語 |
en |
| 言語 |
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言語 |
eng |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Microwave emission; Rock fracture; Volcanic activity; Earthquake; Field test; Miyake Island |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Takano, Tadashi
前田, 崇
Miki, Yoji
Akatsuka, Sayo
Hattori, Katsumi
Nishihashi, Masahide
Kaida, Daishi
Hirano, Takuya
Takano, Tadashi
Maeda, Takashi
Miki, Yoji
Akatsuka, Sayo
Hattori, Katsumi
Nishihashi, Masahide
Kaida, Daishi
Hirano, Takuya
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| 著者所属 |
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日本大学 |
| 著者所属 |
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宇宙航空研究開発機構(JAXA) |
| 著者所属 |
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宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS) |
| 著者所属 |
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宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS) |
| 著者所属 |
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千葉大学 |
| 著者所属 |
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千葉大学 |
| 著者所属 |
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千葉大学 |
| 著者所属 |
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千葉大学 |
| 著者所属（英） |
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en |
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Nihon University |
| 著者所属（英） |
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en |
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Japan Aerospace Exploration Agency(JAXA) |
| 著者所属（英） |
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en |
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Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); |
| 著者所属（英） |
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en |
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Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); |
| 著者所属（英） |
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en |
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Chiba University |
| 著者所属（英） |
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en |
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Chiba University |
| 著者所属（英） |
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en |
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Chiba University |
| 著者所属（英） |
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en |
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Chiba University |
| 出版者（英） |
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出版者 |
Elsevier |
| 書誌情報 |
en : Journal of Applied Geophysics
巻 94,
p. 1-14,
発行日 2013-07
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| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
This paper describes a field test to verify a newly discovered phenomenon of microwave emission due to rock fracture in a volcano. The field test was carried out on Miyake Island, 150 km south of Tokyo. The main objective of the test was to investigate the applicability of the phenomenon to the study of geophysics, volcanology, and seismology by extending observations of this phenomenological occurrence from the laboratory to the natural field.We installed measuring systems for 300 MHz, 2 GHz, and 18 GHz-bands on the mountain top and mountain foot in order to discriminate local events from regional and global events. The systems include deliberate data subsystems that store slowly sampled data in the long term, and fast sampled data when triggered. We successfully obtained data from January to February 2008. During this period, characteristic microwave pulses were intermittently detected at 300 MHz. Two photographs taken before and after this period revealed that a considerably large-scale collapse occurred on the crater cliff. Moreover, seismograms obtained by nearby observatories strongly suggest that the crater subsidence occurred simultaneously with microwave signals on the same day during the observation period.For confirmation of the microwave emission caused by rock fracture, these microwave signals must be clearly discriminated from noise, interferences, and other disturbances. We carefully discriminated the microwave data taken at the mountaintop and foot, checked the lightning strike data around the island, and consequently concluded that these microwave signals could not be attributed to lightning. Artificial interferences were discriminated by the nature of their waveforms. Thus, we inferred that the signals detected at 300 MHz were due to rock fractures during cliff collapses. This result may provide a useful new tool for geoscientists and for the mitigation of natural hazards. |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0926-9851 |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA10826170 |
| DOI |
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関連タイプ |
isVersionOf |
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識別子タイプ |
DOI |
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関連識別子 |
http://dx.doi.org/10.1016/j.jappgeo.2013.03.016 |
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関連名称 |
info:doi/10.1016/j.jappgeo.2013.03.016 |
| 権利 |
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権利情報 |
(C) 2013 Elsevier. NOTICE: This is the author's version of a work that was accepted for publication in Journal of Applied Geophysics. Changes resulting from the publishing process, such as peer review, editing,corrections, structural formatting, and other quality controlmechanisms, may not be reflected in this document. Changesmay have been made to this work since it was submitted forpublication. A definitive version was subsequently publishedin Journal of Applied Geophysics, VOLUME 94,2013-07, DOI: 10.1016/j.jappgeo.2013.03.016 |
| 著者版フラグ |
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出版タイプ |
AM |
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出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| 資料番号 |
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内容記述タイプ |
Other |
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内容記述 |
資料番号: PA1410015000 |
PA1410015.pdf (3.0 MB)
