The Alaska Volcano Observatory (AVO) and partners have established a tradition of reporting on the results of significant volcanic unrest in Alaska by seeking to compile collected works that describe the overall nature of eruptive activity at individual volcanoes. There are typically multiple novel and noteworthy aspects of each eruptive event that are of broad interest to the volcanological community. There are more than 50 historically active volcanoes within the Aleutian arc, most of which are ice- and snow-covered stratovolcanoes, and AVO has a long record of monitoring and evaluating subaerial eruptive activity at these volcanoes. Submarine volcanism in the Aleutian arc is much less common, and until the 2016–2017 eruption of Bogoslof volcano, AVO had never monitored, studied, or evaluated a significant submarine eruption. This special issue of Bulletin of Volcanology reports on our initial research results from a 9-month long, predominantly submarine eruption of Bogoslof volcano.