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第2巻 >Geoelectric Observation used by the Telegraphic Facilities of NTT Corporation
Translated to English from paper in Japanese, originally published in: Memoirs of the Kakioka Magnetic Observatory, Vol.28, No.3 (No.86), pp.1-77, 1989 with permission of the authers.
Geoelectric Observation used by the Telegraphic Facilities of NTT Corporation
Toshio Mori
Contents
Introduction
Observation method
Outline of the observed records
Outline of the records at each observation group
Comparison of the observed record in the same time of a different day
Long-term stability
Impedance tensor and transfer function
Impedance tensor at the Shimodate group and at Kakioka
Impedance tensor at the Mito group and transfer function at Kakioka
Time changes of impedance tensors and transfer functions
Elimination of the electrical fields induced by geomagnetic variations - Detection of the anomalous earth potential -
Analysis method by a stochastic differential equation
For geoelectric fields between Kasama and Mito
Application to the data of electrical fields at the Mito group and Z at Kakioka
Spectral analysis
When using per-minute data
Use of the transfer function and impedance tensor
Relation to tectonic activities
Relation to the earthquake swarms off the east coast of the Izu Peninsula
Relation to eruptions of Izu-Oshima volcano
Other changes
Relation to tide, atmospheric pressure and others
Application for research of fault structure
Iriyama fault
Tanna fault
Fujikawa fault
Anomalous geoelectric change observed near CA (conductivity anomaly) boundary
Electrical observation on the sea floor by making use of the power-feeding arrangement of the Permanent Ocean-Bottom Seismograph Observation System off Boso Peninsula (BSOBS)
