Narrator: But what they could not have known at the time was that activation of the geothermal power plant would subtly perturb the magma flows in such a way as

Narrator: But what they could not have known at the time was that activation of the geothermal power plant would subtly perturb the magma flows in such a way as to hasten the supervolcanp's eruption. [just an alternative take, not based on any firm facts]