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EVIDENCE OF ROTATIONAL MACROSEISMIC EFFECTS IN GREECE (2014)

A considerable number of damaging earthquakes in Greece, have produced a variety of macroseismic effects to both built and natural environment. After a strong earthquake, rotational effects have been observed mainly on free-standing columns, statues, chimneys, tombstones and, more rarely, to buildings (permanent) or on heavy furniture (temporary). In the case of Greek and Roman free–standing columns and temples which have survived from collapse, rotation and lateral displacement between their drums is often observed, depending on the earthquake magnitude and epicentral distance. The phenomenon indicates that such simple and uniform structures appear to be more resistant to the near earthquakes, a fact that ensures their survival over the centuries. Regarding historical earthquakes, identifying, assessing and dating such distortions and explaining their preferential character is based on literary sources. For recent earthquakes, photographic and descriptive material is used. An assembly of rotational effects for historical and instrumental earthquakes in Greece is therefore performed, and presented after a thorough discussion

Reference:
Second European Conference on Earthquake Engineering and Seismology, Istanbul Aug. 25-29, 2014
Organization:
Department of Geophysics, Faculty of Geology & Geoenvironment, University of Athens
Greece
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