THE FORGOTTEN EARTHQUAKE OF 1440 AD IN ISTRIA - ARCHAEOSEISMOLOGICAL EVIDENCE FROM THE EUPHRASIUS CATHEDRAL, POREČ, CROATIA
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Abstract
The Istria Peninsula in the northern Adriatic Sea (shared by Croatia and Slovenia) is considered to be a nearly aseismic part of the Adriatic microplate, as opposed to the seismically active frontal ranges of the Dinaric orogen. We present new archaeoseismological data from the Medieval Euphrasius Cathedral in Poreč, which supports an unknown intensity earthquake in 1440 AD. The earthquake caused the southern aisle of the cathedral to collapse, resulting in permanent damage to the marble columns. Set in the context of regional seismicity and tectonic activity, the Istria peninsula cannot be omitted from regional seismic zoning studies.
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