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Many have wondered about the numerous "explosions" seen on the live feeds. Some are due to high pressure sand blasting and blasting to excavate and to widen the original 3rd well blown crater into a wide depression. Later on after the 1 Aug nuke, many of the seabed fissures started to vent gas and oil. Thus high grouting were carried out in an effort to seal these fissures. August - September 2010 was a really busy period for the crew trying to seal those blow vents and fissures.