Potential Variations of Metal Electrode in the Air during Seismic Wave Propagation

Nobunao Takeuchi; Kan Ohkubo; Noriyasu Honma

doi:10.1541/ieejeiss1987.120.10_1409

Nobunao Takeuchi, Kan Ohkubo, Noriyasu Honma

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2000 Volume 120 Issue 10 Pages 1409-1415

DOI https://doi.org/10.1541/ieejeiss1987.120.10_1409

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Published: October 01, 2000 Received: September 16, 1999 Available on J-STAGE: December 19, 2008 Accepted: - Advance online publication: - Revised: -
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Date of correction: December 19, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : We observed the coseismic electromagnetic phenomena just at the occurrence of the earthquake in Sendai area. This earthquake's epicenter was very close, less than 10km from our observation site. Our site accidentally located on the fault of which underground tip slid at the focus. In addition to variations of the ground acceleration signals and the earth potential difference ones, we observed the clear variations of the atmospheric electricity using the system with 10 ms sampling time. In its aftershock we can identify the very small coseismic variations of atmospheric electricity removing the other unnecessary signals. The model how this variation appears is proposed. More events are needed to make this clear and the observation must be continued.
Right : We observed the coseismic electromagnetic phenomena just at the occurrence of the earthquake in Sendai area. This earthquake's epicenter was very close, less than 10km from our observation site. Our site accidentally located on the fault of which underground tip slid at the focus. In addition to variations of the ground acceleration signals and the earth potential difference ones, we observed the clear variations of the atmospheric electricity using the system with 10ms sampling time. In its aftershock we can identify the very small coseismic variations of atmospheric electricity removing the other unnecessary signals. The model how this variation appears is proposed. More events are needed to make this clear and the observation must be continued.

Date of correction: December 19, 2008 Reason for correction: - Correction: CITATION Details: [in Japanese]

Date of correction: December 19, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

We observed the coseismic electromagnetic phenomena just at the occurrence of the earthquake in Sendai area. This earthquake's epicenter was very close, less than 10km from our observation site. Our site accidentally located on the fault of which underground tip slid at the focus. In addition to variations of the ground acceleration signals and the earth potential difference ones, we observed the clear variations of the atmospheric electricity using the system with 10ms sampling time. In its aftershock we can identify the very small coseismic variations of atmospheric electricity removing the other unnecessary signals. The model how this variation appears is proposed. More events are needed to make this clear and the observation must be continued.

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