High Quality Content by WIKIPEDIA articles! The Sidoarjo mud flow or Lapindo mud (informally abbreviated as Lusi, a contraction of Lumpur Sidoarjo wherein lumpur is the Indonesian word for mud) is a mud volcano in the subdistrict of Porong, Sidoarjo in East Java, Indonesia that has been in eruption since May 2006. It is the biggest mud volcano in the world, created by the blowout of a natural gas well drilled by PT Lapindo Brantas, although company officials contend it was caused by a distant earthquake. In August 2012, Geologists definitely stated that the Sidoarjo mudflow was caused by drilling operation misconduct which only used a quarter of the height of drilling wallpipe and was not caused by an earthquake 275 kilometer away (more than 100 kilometer). This was stated by a Constitutional Court concerned with the National Budget to bear a part of the disaster fund.