Pirgel

In southeastern Iran they occur in two places, one close to volcanoes such as Bazman and Taftan and are hot (70–90 °C (158–194 °F)) effusions, the other is colder and linked to the extrusion of carbon dioxide and tectonic-sedimentary processes.

Erosion from flowing water has affected both the surroundings as well as the mud volcano itself, forming gullies and ravines probably from the collapse of caverns.

[7] The mud volcano was reported active in May 2003, with the extrusion of cold muddy water and the eruption of bubbles every 15-600 seconds.

[4] The gas extruded at Pirgel is principally carbon dioxide; unlike other mud volcanoes in the region methane is not a component.

[1] The mud volcano is considered to be a sacred place by local people, the site where a holy person manifests itself.