NGU Geohazards - Rockfall susceptibility in Norway, online. The Rockfall susceptibility dataset shows the potential source areas/trigger areas and runout areas of potential rockfalls. Trigger area - area where the rockfall may occur. Runout area - area which is affected by a rockfall when a rockfall occurs.

Map showing Trigger areas - areas where a rockfall may occur, and Runout areas - areas that are affected by a rockfall when a rocfall occurs. The maps have been compiled using a computer model that recognizes the possible source areas/trigger areas in which a rockfall could occur. The criteria used for recognition are the slope of the mountain side and relevant geological information. For each source area/trigger area the runout area of the potential rockfall is calculated automatically using a DEM in combination with the relevant geological information. No field survey has been carried out for the preparation of these maps.