No, in addition to the drilling, seismic and electrical resistivity measurements are also planned. Seismic measurements work with sound waves that map hard layers in the soil. This is similar to taking an ultrasound in a hospital.
Resistivity measurements use weak current to determine the electrical resistance of various soil layers. This gives a picture of which types of rock to expect.
Both methods help to further map the structure of the subsurface.
Whereas drilling and borehole measurements provide an accurate picture of the subsurface at the drilling site, seismic and resistivity measurements complement that in the area of the drilling sites.
Additional drilling will follow at a later date, which will then focus more specifically on the possible locations for the three corner sites. It is still unknown how much drilling will then take place and at which locations.