Extreme precipitation; Rockslide; Recurrent landslides; Flysch Carpathians; Czech Republic

More than 150 landslides originated in the eastern part of the Czech Republic (region of the Flysch Outer Western Carpathians) due to soil saturation caused by antecedent precipitation and long lasting and intensive rainfalls on 16-18 May 2010 (>300 mm as measured by some stations). As a consequence, a multitude of small failures originated. An exception to this is represented by a kilometre-long rockslide (?2-3 mil m3) affecting tectonically weakened and weathered claystone/mudstone-dominated flysch on the southern slope of Mt. Girová (the Beskydy Mountains). A majority of the May 2010 landslide events developed inside older (Holocene or historic) landslide terrains, which points to their spatial persistency and recurrent nature. In spite of the fact that the May 2010 landslide event was not as destructive as some previous landslide activisation in the OWCregion (e.g. July 1997 event), it left many slope failures at the initial stage of their potential future reactivation.