The Matterhorn field site is situated at 3450 m a.s.l. on the north-east ridge (Hoernli ridge) just above the second couloir about 20 min from the Hoernli hut. The sensor cloud is located around and within the detachment zone of the prominent rock fall from July 15, 2003 that relased approximately 1500m2 and led to an evacuation of 84 climbers.
In contrast to the Jungfraujoch installation, the Matterhorn site aims to investigate the temperature evolution in singular clefts and the corresponding cleft dilatations. For this purpose a combination of sensorrods and commercial crack meters are integrated measuring quantities such as temperature, rock moisture, water pressure, cleft dilatation and ice strain at different positions. The initial installation was made in October 2007 with an extension in the summer of 2010.
In addition the field site is equipped with an automatic weather sensor, a high-resolution camera and a remote controlled web cam. In collaboration with the CCES project "COGEAR" we host a precision GPS receiver for geodetic measurements on the Hoernli ridge site.