Figure 9From: Physical property relationships of the Rotokawa Andesite, a significant geothermal reservoir rock in the Taupo Volcanic Zone, New ZealandSpatial attenuation ( α s ) of axial compressional P-wave velocity of Rotokawa Andesite. Attenuation was calculated by the method suggested by MartÃnez-MartÃnez et al. ([2011]) utilizing transmission of the ultrasonic wave and maximum attenuation of the waveform plotted versus axial compressional wave velocity (Vp) obtained under an axial stress of 10 MPa.Back to article page