Shark attack, 1976-10-18 (Unprovoked)
Location: Moonstone Beach, Humboldt County, California, USA
Time: 14h30
Activity: Surfing
Victim: William Kennedy (M, age 25)
Injury: Leg bitten 
Fatal: N
Species: White shark, 3 m to 4 m [10' to 13'] 
Source: D. Miller & R. Collier, R. Collier, pp.70-71; J. McCosker & R.N. Lea