Relation between structure and low-temperature geothermal systems in Fukuoka city, southwestern Japan

Hakim Saibi, Jun Nishijima, Tomohiro Hirano, Yasuhiro Fujimitsu, Sachio Ehara

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


The Fukuoka area is located in the Southwestern part of Japan. The Yokote-Ijiri area, located in the southern part of Fukuoka city, has several low-temperature geothermal systems, including eleven hot springs. From 1996 to 2008, the Fukuoka area was investigated by gravity survey, using Scintrex CG-3 and CG-3M gravimeters, in an attempt to delineate its subsurface structure. The surveys were intended to improve the understanding of the relation between the geothermal systems and the subsurface structure as well as to locate the active faults in the surveyed area, which are responsible for generating large earthquakes. The gravity data were analyzed using integrated gradient interpretation techniques, such as the Horizontal Gradient (HG), Tilt Derivative (TDR), and Euler deconvolution methods. With these techniques, many faults were detected, including the famous Kego fault, which is an active fault in Fukuoka city. A 2-D gravity model was constructed to show the relationship between the faults and the geothermal systems. The results of the present study will hopefully lead to an understanding of the relationships between the interpreted faults and the location of the low-temperature geothermal systems and possibly aid in future geothermal exploration of the area.

Original languageEnglish
Pages (from-to)821-826
Number of pages6
JournalEarth, Planets and Space
Issue number8
Publication statusPublished - 2008
Externally publishedYes


  • Fukuoka city
  • Gravity
  • Kego fault
  • Low-temperature geothermal systems
  • Structure

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science


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