Mannen

Coordinates: 62°27′31″N 07°46′32″E / 62.45861°N 7.77556°E / 62.45861; 7.77556

Mannen is a mountain rising 1,294 metres (4,245 ft) over the village of Horgheim, along the river Rauma in Romsdalen, Norway. Mannen has a distinctive needle peak. The mountain's shape has been compared to an enormous seated goose that looks out over the Rauma valley, from which it can easily be seen.

As the mountain is unstable — a major landslide of up to 100 million cubic metres of material is said to be impending — an emergency preparedness service, the Åknes/Tafjord intermunicipal company (IKS), has closely monitored the area since 2009. Even a smaller slide of about 2 million cubic metres could cross the valley floor, potentially devastating buildings and damaging the Rauma Line railway and European route E136. Such an event could also partially or completely dam up the river Rauma, creating major disruption and a flooding hazard.

During the autumn of 2014 observers became aware of an abnormally large shifting of a portion of the mountain. While it normally shifts by 1-2 centimetres per year, for three weeks the movement averaged 7 millimetres per day. As a precaution, on October 22 several houses potentially in the path of a landslide were evacuated and the Rauma Line stopped its four-times-a-day rail service.