Journal
GEOPHYSICAL JOURNAL INTERNATIONAL
Volume 143, Issue 2, Pages 469-477Publisher
BLACKWELL SCIENCE LTD
DOI: 10.1046/j.1365-246X.2000.01272.x
Keywords
earthquake prediction; earthquakes; faulting; geochemistry; hydrology; permeability
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Water-level data recorded during 1989-1999 at 16 closely clustered wells near the Tone 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.
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