Darned if I know, so I looked around. :-)
Try here...
https://www.sciencedirect.com/topics/engineering/double-flash-power-plant
FWIW, I just find it interesting that the two modern fissure eruptions are taking place within spitting distance of geothermal plants.
And on Krafla...
https://icelandmag.is/article/krafla-fires-one-largest-volcanic-eruptions-icelands-modern-history