Hawaiian Islands form an archipelago Hawaiian Islands form an archipelago Loihi oceanservice.noaa.gov Hawaiian Islands The Hawaiian Islands were formed by volcanic activity Hawaii islands Hawaiian Islands form an archipelago How did the Hawaiian Islands form? oceanservice.noaa.gov http://oceanservice.noaa.gov/facts/hawaii.html https://oceanservice.noaa.gov/facts/hawaii.html The Hawaiian Islands were formed by volcanic activity Loihi http://oceanservice.noaa.gov/facts/hawaii.html Millions of years of eruption archipelago