Happen and we don't know exactly how long after that we'll start seeing the ground water heating up and the explosive eruptions. we know it's happening. we don't know the timing. >> shepard: would the explosions be from different vents or the main crater? how would you describe it? >> what is happening now, we're seeing fissures opening up in the last few weeks. 15 new vents opening. from the vents, we're seeing lava flow coming out. some plumes are going 100 feet in the air and producing huge amounts of gas like sulfur dioxide. we're seeing the plumes at the maximum level or higher. then on t...