Abstract
It has been pointed out that a destructive earthquake will occur in the Tokai District, central Japan, by the interactive motions between the Philippine Sea Plate and the Eurasian Plate in the near future.
In order to detect precursory crustal movements of the earthquake as a earthquake prediction scheme, a long baseline (365m) water-tube tiltmeter was set in March, 1983, at Sagara-cho, which is the central part of the source region of the presumed earthquake. The direction of the water-tube is N60°W, which is the convergent direction of the Philippine Sea Plate to the Eurasian Plate. The effects of ground water and room temperature were investigated from the records obtained by the tiltmeter since June, 1983.
In order to check the recorded values, the leveling surveys have been repeated 11 times between the two observation sites at the both ends of the tiltmeter. The values obtained by the tiltmeter correspond well with those by the leveling surveys.
The ground water levels were measured near the northwest site, since December, 1985. The tiltmeter results corrected for the effects of ground water level and room temperature show that the ground is consistently tilting to northwest. This direction is reverse to that of the regional tilting change obtained from the leveling survey by the Geographical Survey Institute.
The local gravity high anomaly exists near the southeast site of the tiltmeter. The northwest tilting observed by the tiltmeter is possibly caused by a local folding, while the tilting change obtained by the leveling survey is possible the regional phenomenon by the plate motion.
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References
Geographical Survey Institute (1989). Crustal movements in the Tokai District, Report of the Coodinating Committee for Earthquake Prediction, vo1. 42, 257–267. (in Japanese)
Ishibashi, K. (1981).Specification of a soon-to-occur seismic faulting in the Tokai District, central Japan, based upon seismotectonics, Earthquake Prediction, An International Review, D.W. Simpson and P.G. Richards (Eds.), Maurice Edwing Ser.,IV, Am. Geophys. Union, Washington, D.C., 297–332
Satomura, M., Dambara, T., Hasegawa, Y., Toyama, T., Shichi, Ry., Samesima, T., Ino, M., Iwata, T. and Hagiwara, T. (1987). Descreption of Sagara and Kamisaka Observation station for Crustal Movements, Geosci. Repts. Shizuoka Univ., 157–164. (in Japanese)
Shichi, Ry., Okuda, T. and Yoshioka, S. (1980).A new design of moving float type water-tube tiltmeter, Jour.Goed.Soc.Japan, 26,1–16. (in Japanese)
Ujiie, H. (1962).Geology of the Sagara-Kakegawa Sedimentary Basin in central Japan, Sci. Rep. Tokyo Kyoiku Diagaku. ser.C., no.75, 123–188.
Yanagisawa, M. (1980). Rainfal1 effect on the tilt observations at Usami, the I zu Peninsula, Jour.Geod.Soc.Japan, 26, 189–199. (in Japanese)
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© 1990 Springer-Verlag New York Inc.
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Satomura, M. et al. (1990). Observation of Crustal Movements by Means of a Long Baseline Water-Tube Tiltmeter at Sagara, Shizuoka, Japan. In: Vyskocil, P., Reigber, C., Cross, P.A. (eds) Global and Regional Geodynamics. International Association of Geodesy Symposia, vol 101. Springer, New York, NY. https://doi.org/10.1007/978-1-4615-7109-4_37
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DOI: https://doi.org/10.1007/978-1-4615-7109-4_37
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