The scientists from Geological Institute of Bulgarian Academy of Sciences and Royal Observatory of Belgium perform the joint researches on the territory of Bulgaria. The project aims to provide and analyse the first quantitative paleoseismological data for some active recently faults in Trace depression, South Bulgaria. The data are based on geomorphologic and geophysical studies, trenching, and studies on the speleothems. The final result is evaluation of the recurrence of strong earthquakes.

    After analysing the historical seismisity we choose the region of the town of Chirpan and the village of Popovitsa, where two strong events happened in 1928. The damages, ruptures and surface changes have been carefully described and published by scientists just after the earthquakes.