著者
Uyeshima Makoto Kinoshita Masataka Iino Hideaki Uyeda Seiya
出版者
東京大学地震研究所
雑誌
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo (ISSN:00408972)
巻号頁・発行日
vol.64, no.4, pp.487-515, 1990-03-30

The VAN-method for short-term earthquake prediction based on monitoring telluric potential changes, which has reportedly been successful in Greece, is now under testing in Japan. More than 20 local networks have been established and tested for about one year using existing electrodes and cables of the Nippon Telegraph and Telephone Corporation (NTT). Generally the records suffer from cultural noise much higher than in Greece, but some stations far from DC-powered rail-roads were found to be reasonably noise-free. Preliminary examination of data indicates that potential precursory signals in the sense of the VAN-method were recognized preceding earthquakes of M≧5 at some stations. This report presents an example, i.e. the possible correspondence between a specific type of telluric potential change appearing in the channel 2 at Teshikaga station, Hokkaido, and seismicity in the region off Kushiro, Hokkaido.

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