測地学会誌
Online ISSN : 2185-517X
Print ISSN : 0038-0830
ISSN-L : 0038-0830
水準測量と傾斜観測の相補性
笠原 慶一
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ジャーナル フリー

1973 年 19 巻 2 号 p. 93-99

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Levelling data in several tectonic areas are compared with tiltmeter readings at adjacent stations. This is to examine the function of a crustal movement monitoring system which is based on the complemental use of continuous observations with geodetic surveys. Briefly speaking, this idea seems successful so far as the present examples are concerned. Rhythms of secular tilt accumlation which are read on tiltmeters are almost consistent with the levelling data. With respect to the rate and the azimuth of predomi-nant tilting, however, the two sorts of data are not consistent, reflecting the inhomo-geneous crustal structures. Examining the data more precisely, we sometimes notice significant phase lag of the tiltmeter curves to the levelling curves (vertical land movement). This effect may be attributed to migration of the crustal movements. A brief discussion has been developed, from this point of view, to clarity migration of the land upheaval in the Niigataand Miura peninsula areas.

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