Séismes, néotectonique et effets induits sur les versants des massifs des Babors dans la région de Kerrata (Algérie)

Abstract

In seismically active mountain ranges of Papua New Guinea, geomorphic effects of earthquakes are very important. Four examples are analysed. In Adelbert Range, Torricelli-Bewani Mountains and Finisterre- Saruwaged Range, the denudation rate is estimated to be about 100 cm/ 1 000 years, 70 % of this can be attributed to earthquakes. Three types of landslides are initiated by the seismic events : debris avalanches (the most important), earthflows and rockfalls. In rainforest karst of New Britain (Nakanai Mountains), seismic influence is more limited (problem of dolines-avens collapse).