In 2009, an above-average number of landslides occurred in Styria, particularly in the south eastern part of Styria. Heavy rain in June 2009 is mentioned to be the trigger of these events.The aim of the present thesis is to investigate the interaction of precipitation (rainfall), soil properties and environmental changes in view of landslides, in particular in the south eastern part of Styria, in order to study slope stability over a certain range of time. As climate change progresses and exploitation of land is increasing, landslides as well as mass wasting, landslips and rock falls become a growing issue. With increasing frequency, these events end up in natural disasters and pose a major challenge for experts in countries like Austria or other countries with similar landform configuration. Another important factor is to describe the interaction of atmosphere and lithosphere (geomorphology). In detail the present thesis points out how heavy rain influences the lithosphere and furthermore, which geomorphological processes influence the biosphere and anthroposphere. It can be clearly observed that heavy rain is the trigger for landslides. An unmistakable correlation between changed slope condition and landslides can be recognized. Nevertheless, a significant number of heavy rain falls was recorded in 2009 and already in fall and winter 2008, influencing the stability of slopes significantly. The present thesis will also provide a picture on the status quo of disposition maps for landslides for the region of south east Styria.