Type:		Journal, Article
Title:		Analysis of earth potential difference signals by using seismic wave signals
Author(s):		Takeuchi, N.; Chubachi, N.; Hotta, S.; Narita, K.
Date:		1998/12
Abstract:		A modified measurement method has been used to continuously observe earth potential difference (EPD) signals induced by seismic waves. This method reduces the level of extraneous signals induced by artificial and natural earth current sources. The observed signals were compared with the corresponding seismic waveforms from the Earthquake Observatory of Tohoku University, which is located 700 m from us. Comparison with each waveform component (acceleration, velocity, and displacement) showed that the proposed streaming potential model reflecting the earth acceleration adequately explains the EPD signal. The estimated ratio between the earth electrical field (potential difference) and the pressure difference in the ground, i.e., the coupling coefficient, was found to be reasonable based on the streaming potential model.
Publisher:		Wiley Subscription Services, Inc., A Wiley Company
Journal (full):		Electrical Engineering in Japan
Volume:		125
Issue:		4
Start Page:		52
End Page:		59
Link:		http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1520-6416(199812)125:43.0.CO;2-P/abstract
Link (PDF):		http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1520-6416(199812)125:43.0.CO;2-P/pdf