Abstract
In 2006, we started construction of an observation network of 12 stations in and around Shikoku and the Kii Peninsula to conduct research for forecasting Tonankai and Nankai earthquakes. The purpose of the network is to clarify the mechanism of past preseismic groundwater changes and crustal deformation related to Tonankai and Nankai earthquakes. Construction of the network of 12 stations was completed in January 2009. Work on two stations, Hongu-Mikoshi (HGM) and Ichiura (ICU), was finished earlier and they began observations in 2007. These two stations detected strain changes caused by the slow-slip events on the plate boundary in June 2008, although related changes in groundwater levels were not clearly recognized.
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Acknowledgments
We wish to thank the members of the Tectono-Hydrology Team, Geological Survey of Japan, AIST for their cooperation and advice. We are grateful to the many people who have assisted us with our groundwater observations. We also wish to thank Dr. Townend and one anonymous reviewer for their helpful advice.
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Itaba, S., Koizumi, N., Matsumoto, N. et al. Continuous Observation of Groundwater and Crustal Deformation for Forecasting Tonankai and Nankai Earthquakes in Japan. Pure Appl. Geophys. 167, 1105–1114 (2010). https://doi.org/10.1007/s00024-010-0095-z
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DOI: https://doi.org/10.1007/s00024-010-0095-z