Towering 0 metres above the ocean floor 19 nautical miles to the southwest of the wilderness lodge lies Kavachi, one of the world's few active and visible underwater volcanos. Named after a mythical sea-god of the Gatokae and Vangunu peoples, Kavachi has been erupting on a regular [though thoroughly unpredictable] basis for the past five years including several temporary island-building events, and has a long history of eruption and temporary island-building. During eruption phases the volcano is throwing ash and projectiles up to 0 metres into the air and the fiery glow can be seen at night from the weather coast of Gatokae, some 30km distant. Between eruption phases the vent produces a vigorous surface upwelling of mud, sulfur, rock fragments and gas bubbles. The lodge has a comprehensive file of information, photos and history.
I visit Kavachi regularly [weather-permitting] to monitor activity, fish and freedive the vent which teems with pelagic fish. Sitting in the boat 50 metres from the vent during eruption, the source of the volcano's traditional name - Rejo te Kavachi [Kavachi's oven] - is abundantly clear with the radiated heat uncomfortable on the face and the occasional wayward projectile requiring evasive action. Not all visits need be so adventurous though - in fine weather the 90 minute trip gives spectacular views of Gatokae and Vangunu, and Kavachi is still an awesome experience from a safer distance of metres.
