Short-Term Vertical Datum Variability and Vertical Crustal Movements in East Asia |
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| Authors: | S C Stiros P A Pirazzoli |
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| Institution: |
a Geodesy Laboratory, Department of Civil Engineering, Patras University, Patras, Greece
b CNRS, Laboratoire de Geographie Physique, Meudon-Bellevue, France |
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| Abstract: | Field biological and geomorphological observations in certain East Asia coasts permit definition of Mean Sea Level (MSL) with an accuracy of ～10 cm, that is, a vertical geodetic datum, as well as recognition of the MSL of fossil shorelines, up to a few thousand years old, mainly associated with tectonic/seismic effects. Subsidence produced by compaction of nearly-surficial strata seems also to be a usual effect. These data indicate that datum variability is a widespread effect in East Asia, time-dependent even at time scales affecting engineering works, but only in a few cases fully predictable. |
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