Precursory chemical changes in ground water: kobe earthquake, Japan.

  title={Precursory chemical changes in ground water: kobe earthquake, Japan.},
  author={Urumu Tsunogai and Hiroshi Wakita},
  volume={269 5220},
Chloride (Cl(-)) and sulfate (SO(4)(2-)) ion concentrations of ground water issuing from two wells located near the epicenter of the Kobe earthquake in Japan fluctuated before the disastrous magnitude 7.2 event on 17 January 1995. The samples measured were pumped ground water packed in bottles and distributed in the domestic market as drinking water from 1993 to April 1995. Analytical results demonstrate that Cl(-)and SO(4)(2-) concentrations increased steadily from August 1994 to just before… CONTINUE READING
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