Fig. 8From: Geophysical imaging of subsurface structures in volcanic area by seismic attenuation profilingHypocenter distributions by Nishizawa et al. (2002). The hypocenters determined by OBS during the time rage from July 11 to 31 in 2000 (top figure) and from January 21 to February 13 in 2001 (bottom figure) are shown. Thin and thick dashed lines indicate the lower boundaries of the earthquake activities of the top and bottom figures, respectivelyBack to article page