Fig. 1: Lusi seepage views.
From: Extensive oil, ethane and propane discharge at the mega seepage system of Lusi, Indonesia

Google Earth view of the study area in 2006 (A) and 2012 (B). The embankment is highlighted with a red line, black stains in the hydrothermal pond represent the oil slicks. The morphology of the Lusi crater changed during the first ~ 13 years of activity. Map of eastern Java Island in the inset. Drone photo of the Lusi crater in 2006 (C), with an example of the berm construction to contain the mud flow, and in 2013 (D). During gradual subsidence, the berm disappeared, submerged by mud and the crater site remained isolated and not accessible by foot. E, F Discharge of the Lusi mud in the Porong River, April 2017 (see (A) for location).