Slightly bigger photo on this site plus a bit more info.
AirAsia Flight 8501: Tail Recovered - WSJ
The compression damage just forward of the tail section suggests an initial impact on the port side.
With regard to injury damage correlated to G, the US Navy aircraft accident manual gives the following:
Injury sustained Deceleration
Nose - fracture 30G
Vertebral body - compression 20-30G
Fracture dislocation of C1 on C2 20-40G
Mandible - fracture 40G
Maxilla - fracture 50G
Aorta - intimal tear 50G
Aorta – transection 80-100G
Pelvis – fracture 100-200G
Vertebral body – transection 200-300G
Total body fragmentation >350G