Were they not drilling into the ground in Iceland years back for geothermal power that help trigger this?
Not only were they drilling in Iceland, they are currently drilling the world's deepest geothermal well. The goal is to drill it to 4,500 meters to locate and potentially utilize supercritical water for energy production.
Links:
IDDP Krafla - the next phase
Iceland Deep Drilling Project Finds Magma