If you mean the big spill that just happened, It happened in the Gulf of Mexico and started when a BP oil rig caught on fire and sunk into the ocean, which is now spilling oil miles below the sea under water. Gee, thanks BP. Hope this helped!
Greenpoint oil spill happened in 1978.
Montara oil spill happened in 2009.
Prestige oil spill happened in 2002.
Enbridge oil spill happened in 2010.
Rena oil spill happened in 2011.
The oil spill occured in Summer, 2010.
Mingbulak oil spill happened in 1992.
you can't. An oil spill can happen anytime, anywhere, be it by accident or on purpose.
Katina P oil spill happened in 1992.
North Cape oil spill happened in 1996.
Cosco Busan oil spill happened in 2007.
West Cork oil spill happened in 2009.