Figure 9

Resistivity structure of the primary drill site based on inversion of continuous magnetotelluric data along the northernmost MT line shown in Figure 8a (Martyn Unsworth, pers. comm. 1988; see also Unsworth et al., 1997). The proposed drill hole is also shown along with earthquake hypocenters (red crosses from Michellini and McEvilly, 1991; blue filled circles from Eberhardt-Phillips and Michael, 1991).