TY - JOUR
T1 - Development of the HTS-SQUID system for measuring ULF band magnetic field changes related with earthquakes
AU - Kasai, N.
AU - Fujinawa, Y.
AU - Iitaka, H.
AU - Nomura, K.
AU - Hatsukade, Y.
AU - Sato, S.
AU - Nakano, H.
AU - Doi, T.
AU - Nemoto, T.
AU - Ishiyama, A.
PY - 2001/12
Y1 - 2001/12
N2 - The electromagnetic field change in the ultra low-frequency (ULF) band was observed in order to investigate the precursory phenomena of crystal activity such as earthquakes, volcanic eruptions and landslides. The measurements are conducted to make clear the generation mechanism of the anomalous electromagnetic field occurring before and during these disastrous phenomena. We have constructed a portable system with a HTS-SQUID magnetometer for the observation of the ULF magnetic field. A dewar that kept liquid nitrogen for about three weeks was developed for a long recording period. The performance of the system was tested at Mt Bandai, an active volcano in Fukushima prefecture, Japan. The system worked for 36 hours. Some anomalous magnetic held changes were recorded before and after the volcanic earthquake which occurred during the field test.
AB - The electromagnetic field change in the ultra low-frequency (ULF) band was observed in order to investigate the precursory phenomena of crystal activity such as earthquakes, volcanic eruptions and landslides. The measurements are conducted to make clear the generation mechanism of the anomalous electromagnetic field occurring before and during these disastrous phenomena. We have constructed a portable system with a HTS-SQUID magnetometer for the observation of the ULF magnetic field. A dewar that kept liquid nitrogen for about three weeks was developed for a long recording period. The performance of the system was tested at Mt Bandai, an active volcano in Fukushima prefecture, Japan. The system worked for 36 hours. Some anomalous magnetic held changes were recorded before and after the volcanic earthquake which occurred during the field test.
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U2 - 10.1088/0953-2048/14/12/333
DO - 10.1088/0953-2048/14/12/333
M3 - Article
AN - SCOPUS:0035668157
VL - 14
SP - 1135
EP - 1139
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 12
ER -