**3. The Soultz-sous-Forêts EGS**

The Soultz-sous-Forêts' (called Soultz in the following) project began in the late eighties thanks to a particular geological context. Several zones in France are submitted to high heat flows, among which the Soultz area, because of the development of a rift system in northern Europe (Figure 1). Initiated by a French-German team (Gérard et Kappelmeyer, 1987), the Soultz program has been a European project with a significant Swiss contribution mainly supported by public funding between 1987 and 1995 and co-funded by industry from 1996 to present (Genter et al., 2009). The Soultz projetc represents a multinational approach to develop an EGS in Europe.
