Mount Gareloi and Gareloi Island

From volcano.und.edu:

Gareloi is a small conical stratovolcano that erupted most recently in 1989. The explosive eruption had a VEI of 1. Gareloi may have erupted as many as 15 times since 1760. Most eruptions were explosive with VEI of 2 or 3.

A spectacular eruption in 1929 produced 12 craters along a 2.5 mile (4 km) long fissure that extended from the summit to the ocean.