Spatio-temporal analysis of a complex landslide in the Northern Apennines (Italy) by means of dendrochronology

摘要: Dendrochronology is used to determine the spatial and temporal development of movements in a complex landslide located Northern Apennines. The analysis trees growing on body enabled us date their colonisation pattern, which starts from 1920s increases mainly after 1950. Since then, sampled recorded with growth anomalies involving 1956, 1957, 1982, 1983, 1990, 1995 1998. These are reactivations main that probably occurred last decades 19th century. In 1980, upper were involved rock fall due expansion scarp. Microsections, cut out selected tree-ring sequences, allowed seasonal dating highlighted mostly early spring. Meteorological seismic time series analyzed order relate them search for correlations triggering events. activity, although characterized by low magnitudes, could be able either trigger (1990) or destabilize ground, where rainfalls have been playing first role reactivation (probably 1983 1995). other seem linked long-lasting monthly rainfall peaks following dry periods.