DSC00300

Geologists reignited the debate Monday about whether to blame nature or humans for the devastating eruption nine years ago of an Indonesian mud volcano still oozing its all-consuming sludge today.

New analysis of underground gas levels measured at the time of the outburst point the finger to gas exploration -- not an earthquake -- as the trigger, a research team from the United States, Britain and Australia wrote in the journal Nature Geosciences.