A water well sensitive to seismic waves

Masao Ohno; Hiroshi Wakita; Kenji Kanjo

doi:10.1029/97GL00471

A water well sensitive to seismic waves

Masao Ohno, Hiroshi Wakita, Kenji Kanjo

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

The water level in an observation well (EDY) has been monitored with high frequency sampling (1/sec). Large changes in the water level are observed in this well, which correspond to dynamic strain changes due to the passage of long period seismic waves. For example, fluctuations of more than 200 cm were observed after a M 8.1 earthquake, 1200 km from the observation site. The response characteristic of the water level to strain change was investigated by comparison with nearby volumetric strain changes: the response curve has a peak of sensitivity and a phase transition at periods of 18-19 seconds. At the resonant period, the sensitivity is as large as 15 mm per 10^-9 strain.

Original language	English
Pages (from-to)	691-694
Number of pages	4
Journal	Geophysical Research Letters
Volume	24
Issue number	6
DOIs	https://doi.org/10.1029/97GL00471
Publication status	Published - 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Geophysics
Earth and Planetary Sciences(all)

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10.1029/97GL00471

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AU - Ohno, Masao

AU - Wakita, Hiroshi

AU - Kanjo, Kenji

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AB - The water level in an observation well (EDY) has been monitored with high frequency sampling (1/sec). Large changes in the water level are observed in this well, which correspond to dynamic strain changes due to the passage of long period seismic waves. For example, fluctuations of more than 200 cm were observed after a M 8.1 earthquake, 1200 km from the observation site. The response characteristic of the water level to strain change was investigated by comparison with nearby volumetric strain changes: the response curve has a peak of sensitivity and a phase transition at periods of 18-19 seconds. At the resonant period, the sensitivity is as large as 15 mm per 10-9 strain.

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A water well sensitive to seismic waves

Abstract

All Science Journal Classification (ASJC) codes

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