Figure 17

Schematic map of site characterization experiments. Permanent seismograph stations shown by triangles (open: analog, filled: digital). Light circle corresponds to footprint of passive monitoring/tomography array (Thurber, Roecker, McEvilly). Rectangle is area of 3-D reflection survey (Klemperer, Hole, Talwani, Fuchs, Karrenbach). Gray line is profile for line for shallow reflection/refraction survey (Rymer, Catchings, Fuis, Klemperer), drill bit VSP and dense monitoring array (Malin, McEvilly, Rector). "Tee" is fault zone guided wave array (Li, Aki). Dashed line extending out of figure is 50-km-long deep reflection/refraction profile (Prodehl, Ryberg). Two additional digital seismograph stations are also proposed near the drill site.