Kilauea (Hawaii):
Summit shallow reservoir:
seismicity + deformations
volume  = 5 108 m3
depth  = 2 - 4 km
Etna (Italy) :
below the south east crater:
depth: 2 - 4 km;
volume = 4 107 m3 
Physical parameters (6): Geometry of magma reservoirs
Stromboli (Italy): 2 reservoirs: sismo + petro
shallow (seismicity): depth: 300 m
deep (petrology only): depth: 7 - 8 km
Etna main degassing reservoir = 5 108 m3 ; depth : 6 km and deeper