The Sidoarjo Mud Flow is an eruption of the world’s largest mud volcano in Porong, Sidoarjo in East Java, Indonesia. This on-going disaster has been spewing toxic mud since May 2006, displacing thousands of people from their homes, as well as an alarming increase in serious health issues among residents. The cause of the mudflow has been widely contested with two leading theories. Some believe it was caused by PT Lapindo, a gas & oil company drilling in the region. Others believe it was caused by an earthquake that occurred at the same time as the eruption.