In search of earthquake precursors in the water-level data of 16 closely clustered wells at Tono, Japan

C. Y. King, S. Azuma, M. Ohno, Y. Asai, P. He, Y. Kitagawa, G. Igarashi, H. Wakita

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Water-level data recorded during 1989-1999 at 16 closely clustered wells near the Tono mine in central Japan are searched for possible premonitory changes before earthquakes. The results suggest that some water-level drops at a sensitive well before an M5.8 local earthquake on 1997 March 16 and some large distant earthquakes during 1994-1995 in Japan may have been premonitory in nature. The high sensitivity of this well to earthquake occurrence is attributed to the near-critical hydrological conditions and the relatively high permeability of the tapped aquifer.

Original languageEnglish
Pages (from-to)469-477
Number of pages9
JournalGeophysical Journal International
Issue number2
Publication statusPublished - Dec 2 2000
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

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