Future of Hawaii's Volcanoes: Plate Movement Over Hotspot

Hawaii's volcanoes form as the Pacific Plate moves NW over the stationary Hawaiian hotspot. Currently, Kīlauea and Mauna Loa are active; Lōʻihi Seamount (submarine) is the next forming. As the plate moves, each volcano eventually drifts off the hotspot, becomes extinct, and erodes.

Future trajectory: Continued eruptions for millions of years—island grows. New volcanoes form southeast (Lōʻihi will surface in ~10,000–100,000 years). Older islands erode—Kauaʻi (5.1 Ma) heavily eroded; Oʻahu (3.4 Ma) deeply dissected. Eventual fate: All become atolls then guyots (seamounts) as they subside and erode below sea level. The Emperor Seamount chain (northwest) shows this 80-million-year history. The Big Island is currently the hotspot's focus.