Murashia Volcano Island

Murashia is an active volcanic island in the middle of the sea, and is a supervolcano with a VEI of 8. Some suggest that it's actual VEI might be 9. Since it is almost always active, it is not considered a menace, however it's eruptions tend to be rather violent, so people avoid it. It is regarded as potential dangerous volcano due to it's peculiar characteristics. It has a massive caldera hidden under the sea level. The island is unhabitated, but there are rests of an ancient civilization that abandoned the area, most likely due to high frequency of medium size eruptions.

The latest Murashia supereruption was so large that not only it created severe climatic disturbances and a volcanic winter, but it also disturbed the earth structure.

Morphology
Despite it's supervolcanic nature, it grew a stratocone, large enough to be classified as stratovolcano as whole, and to form a habitable island.