Vector HTS-SQUID system for ULF magnetic field monitoring

Y. Machitani; N. Kasai; Y. Fujinawa; H. Iitaka; N. Shirai; Y. Hatsukade; K. Nomura; K. Sugiura; A. Ishiyama; T. Nemoto

doi:10.1109/TASC.2003.814054

Vector HTS-SQUID system for ULF magnetic field monitoring

Y. Machitani^*, N. Kasai, Y. Fujinawa, H. Iitaka, N. Shirai, Y. Hatsukade, K. Nomura, K. Sugiura, A. Ishiyama, T. Nemoto

^*この研究の対応する著者

先進理工学部

研究成果: Conference article › 査読

5 被引用数 (Scopus)

抄録

Anomalous magnetic field variations in the ultra low frequency (ULF) band were observed as precursory phenomena of earthquakes. We constructed a portable monitoring system by using HTS-SQUIDs for measuring the ULF environmental vector magnetic field. The operation of the system was verified at Mt. Bandai, an active volcano. The system safely worked over 100 hours on batteries. We have achieved long term monitoring with the system at the National Institute of Advanced Industrial Science and Technology (AIST) from February 7 to March' 22 of 2002 using AC power. The measured magnetic field variations were compared with groundwater level, electric field and geo-electric pulse current variations measured at AIST in order to investigate the source of magnetic field radiation found during the long term monitoring.

本文言語	English
ページ（範囲）	763-766
ページ数	4
ジャーナル	IEEE Transactions on Applied Superconductivity
巻	13
号	2 I
DOI	https://doi.org/10.1109/TASC.2003.814054
出版ステータス	Published - 2003 6月
イベント	2002 Applied Superconductivity Conference - Houston, TX, United States 継続期間: 2002 8月 4 → 2002 8月 9

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学
電子工学および電気工学

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10.1109/TASC.2003.814054

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@article{2205731bacee4706aae4aa54b505207e,

title = "Vector HTS-SQUID system for ULF magnetic field monitoring",

abstract = "Anomalous magnetic field variations in the ultra low frequency (ULF) band were observed as precursory phenomena of earthquakes. We constructed a portable monitoring system by using HTS-SQUIDs for measuring the ULF environmental vector magnetic field. The operation of the system was verified at Mt. Bandai, an active volcano. The system safely worked over 100 hours on batteries. We have achieved long term monitoring with the system at the National Institute of Advanced Industrial Science and Technology (AIST) from February 7 to March' 22 of 2002 using AC power. The measured magnetic field variations were compared with groundwater level, electric field and geo-electric pulse current variations measured at AIST in order to investigate the source of magnetic field radiation found during the long term monitoring.",

keywords = "Earthquake, HTS-SQUID, Long term monitoring, Magnetic field variation, Monitoring system, Ultra low frequency",

author = "Y. Machitani and N. Kasai and Y. Fujinawa and H. Iitaka and N. Shirai and Y. Hatsukade and K. Nomura and K. Sugiura and A. Ishiyama and T. Nemoto",

year = "2003",

month = jun,

doi = "10.1109/TASC.2003.814054",

language = "English",

volume = "13",

pages = "763--766",

journal = "IEEE Transactions on Applied Superconductivity",

issn = "1051-8223",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "2 I",

note = "2002 Applied Superconductivity Conference ; Conference date: 04-08-2002 Through 09-08-2002",

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TY - JOUR

T1 - Vector HTS-SQUID system for ULF magnetic field monitoring

AU - Machitani, Y.

AU - Kasai, N.

AU - Fujinawa, Y.

AU - Iitaka, H.

AU - Shirai, N.

AU - Hatsukade, Y.

AU - Nomura, K.

AU - Sugiura, K.

AU - Ishiyama, A.

AU - Nemoto, T.

PY - 2003/6

Y1 - 2003/6

N2 - Anomalous magnetic field variations in the ultra low frequency (ULF) band were observed as precursory phenomena of earthquakes. We constructed a portable monitoring system by using HTS-SQUIDs for measuring the ULF environmental vector magnetic field. The operation of the system was verified at Mt. Bandai, an active volcano. The system safely worked over 100 hours on batteries. We have achieved long term monitoring with the system at the National Institute of Advanced Industrial Science and Technology (AIST) from February 7 to March' 22 of 2002 using AC power. The measured magnetic field variations were compared with groundwater level, electric field and geo-electric pulse current variations measured at AIST in order to investigate the source of magnetic field radiation found during the long term monitoring.

AB - Anomalous magnetic field variations in the ultra low frequency (ULF) band were observed as precursory phenomena of earthquakes. We constructed a portable monitoring system by using HTS-SQUIDs for measuring the ULF environmental vector magnetic field. The operation of the system was verified at Mt. Bandai, an active volcano. The system safely worked over 100 hours on batteries. We have achieved long term monitoring with the system at the National Institute of Advanced Industrial Science and Technology (AIST) from February 7 to March' 22 of 2002 using AC power. The measured magnetic field variations were compared with groundwater level, electric field and geo-electric pulse current variations measured at AIST in order to investigate the source of magnetic field radiation found during the long term monitoring.

KW - Earthquake

KW - HTS-SQUID

KW - Long term monitoring

KW - Magnetic field variation

KW - Monitoring system

KW - Ultra low frequency

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U2 - 10.1109/TASC.2003.814054

DO - 10.1109/TASC.2003.814054

M3 - Conference article

AN - SCOPUS:0042942797

SN - 1051-8223

VL - 13

SP - 763

EP - 766

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 2 I

T2 - 2002 Applied Superconductivity Conference

Y2 - 4 August 2002 through 9 August 2002

ER -

Vector HTS-SQUID system for ULF magnetic field monitoring

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ASJC Scopus subject areas

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