Sidoarjo mud flow

The Sidoarjo mud flow is the result of an erupting 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; responsibility for it was credited to the blowout of a natural gas well drilled by PT Lapindo Brantas, although some scientists and company officials contend it was caused by a distant earthquake.

At its peak Lusi spewed up to 180,000 cubic meters of mud per day. By mid August 2011, mud was being discharged at a rate of 10,000 cubic meters per day, with 15 bubbles around its gushing point. This was a significant decline from the previous year, when mud was being discharged at a rate of 100,000 cubic meters per day with 320 bubbles around its gushing point.

Source: Wikipedia