Sidoarjo mud flow
The Sidoarjo mudflow (commonly known as Lumpur Lapindo, wherein lumpur is the Indonesian word for mud; and as Lusi (short for Lumpur Sidoarjo) is the result of an erupting mud volcano in the subdistrict of Porong, Sidoarjo, in East Java, Indonesia, that has been active since May 2006. It is the largest mud volcano in the world.