Research on Fault Activity in the North Anatolian Fault Zone
Grant-in-Aid for international Scientific Research
|Allocation Type||Single-year Grants|
|Research Institution||Tokyo Institute of Technology|
HONKURA Yoshimori Tokyo Institute of Technology, professor, 理学部, 教授 (00114637)
BARKA A. Bogazici University, 助教授
GURBUZ C. Bogazici University, 教授
UCER S.B. Bogazici University, 副所長
ISIKARA A.M. Bogazici University, 所長
SUZUKI Yasuhiro Nagoya University, 工学部, 助手 (70222065)
ITO Akihiko Utsunomiya University, 理学部, 助教授 (70134252)
OOKUBO Shuhei The University of Tokyo, 地震研究所, 助教授 (30152078)
OSHIMAN Naoto Kyoto University, 防災研究所, 助教授 (70185255)
IKEDA Yasutaka The University of Tokyo, 理学部, 講師 (70134442)
A Barka ボアージチ大学, 助教授
C Gurbuz ボアージチ大学, 教授
S B Ucer カンディリ観測所, 副所長
A M Isikara カンディリ観測所, 所長
|Project Period (FY)
1992 – 1993
Completed(Fiscal Year 1993)
|Budget Amount *help
¥13,500,000 (Direct Cost : ¥13,500,000)
Fiscal Year 1993 : ¥4,000,000 (Direct Cost : ¥4,000,000)
Fiscal Year 1992 : ¥9,500,000 (Direct Cost : ¥9,500,000)
|Keywords||Turkey / North Anatolian fault / Seismic gap / Active fault / Earthquake / Gravity / Geomagnetic field / Electric field|
The North Anatolian fault zone elongated in the east-west direction in northern Turkey has been considered a test field for earthquake prediction studies, because there exists a so-called seismic gap. The purpose of this project is to investigate the characteristics of earthquake generation through intensive surveys of active faults, as part of basic researches on earthquake prediction.
We have so far made various kinds of surveys ; seismic observations, gravity observations, geomorphological studies of active faults, geomagnetic and electric observations. The outline of these surveys is as follows.
(1) Seismic observation
In order to monitor microseismic activity in the gap area, we have established a radio-linked seismic observation system consisting of a base station, where a three- component seismometer was set up, and five satellite stations, where a vertical-component seismometer was installed. It was found from the observations that some microearthquakes have been occurring in the gap area.
(2) Gravity survey
A precise gravity survey network was established across active faults and the first survey was made. A similar survey must be carried out in the near future to monitor crystal movement in the survey area.
(3) Continuous strain measurement
A precise strainmeter was installed at a station located very close to an active fault to monitor a possible strain change associated with fault displacement.
(4) Continuous geomagnetic and electric measurements
Seven geomagnetic and two electric stations have been in operation to monitor possible changes in the geomagnetic and electric fields associated with earthquakes in the test field.
(5) Geomorphological study
Extensive geomorphological studies were made in the western part of the North Anatolian fault zone, and the cumulative amount of fault displacement could be estimated.
Research Output (9results)