The secular variantion of longitudes and plate tectonic motion |
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| Authors: | E Proverbio and V Quesada |
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| Institution: | (1) International Astronomical Latitude Station, Cagliari |
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| Abstract: | Summary According to the plate tectonic theory of Le Pichon 1968] we summarized the absolute values of the angular rate of rotation
of the Eurasia and America plates determined by astronomical latitude observations. The authors then tried to use the data
of longitude observation so far available to emphasize the existence of similar crust movements. The analysis of longitude
data has shown the minor homogeneity of these astronomical observations especially as far as the observations obtained by
means of PZT are concerned. By using particularly accurate observational data Torao & Okasahi, 1965, 1969] the data of longitude
variations confirm the existence of movements in the earth’s crust, exactly equal to those deduced by the analysis of latitude
observations and in agreement with the results of geophysical measurements. |
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