Figure 5. The source spectrum obtained from the LVIG recording alone (continuous curve), and the median and ±one standard deviation source spectra (dashed curves) for the three events of group A. Dotted curves show source spectra retrieved from station PNIG. Left frames, all data corrected with Q(f) = 251f^0.58; right frames, recordings at LVIG corrected with different Q(f) (given in the frames), for all other stations Q(f) = 251f^0.58.