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 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.