East Java, Indonesia
The mud volcano is located near Surabaya in east Java.
Lusi mud volcano began erupting in  May 2006. 
      The eruption is believed to have  been triggered by the release of pressure from permeable limestone 
      at a depth of 2830 m which escaped  through a gas well to the surface. 
The volcano erupted mud at a rate  of 7000-150,000 cubic metres per day. 
      Mud covered 10 sq km around the volcano  and displaced 11000 people. 
Further reading
      Sawolo, N., Sutriono, E., Istadi, B.P. and Darmoyo, A.B., 2009. The LUSI mud volcano triggering controversy: Was it caused by drilling?. Marine and Petroleum Geology, 26(9), pp.1766-1784.
Mazzini, Adriano, et al. "Triggering and dynamic evolution of the LUSI mud volcano, Indonesia." Earth and Planetary Science Letters 261.3-4 (2007): 375-388.      
    
2006-2008