What caused loihi to erupt?

Answer 1

that the presues under the water was to much on the valcno and so loihi had an way to get rid of its pressure by erupting

Answer 2

Loihi is a volcano located underwater off the coast of Hawaii. Its eruptions are caused by the movement of the Earth's tectonic plates, specifically the Pacific Plate moving over the Hawaiian hotspot. This movement allows magma to rise to the surface and erupt, gradually building the Loihi seamount.