Abstract: An apparatus controls the evacuation of volcanic magma to prevent explosions. Magma evacuation is through a single evacuation tube that heats the magma flow within the tube to prevent stickiness of the magma in the tube. The heating may use small combustion chambers to heat steam, which in turn heats and stabilizes the magma flow. Stability is aided by central cooling, where needed, using water jets from nozzles located at the wall of the tube.

Abstract: A world threatening explosion has been assessed as overdue for a supervolcano discovered under the US Yellowstone National Park. Recent proposals give a method for the controlled evacuation of the volcanic magma to prevent the explosion. The present proposals are much simpler. The evacuation would be through a single evacuation tube, 10 and 11. Means for heating the hot volcanic magma evacuation flow prevent an unacceptable increase of stickiness in the very long tube. The heating may use small combustion chambers to heat steam, which in turn heats, drives, and stabilises the magma flow by injection from 16. Stability is aided by central cooling, using water jets from nozzles 15 and 17 at the wall.