Kīlauea’s summit has been swelling, and researchers say this behavior is helping explain and potentially forecast episodes of lava fountaining. The volcano produces rare, episodic bursts in which molten lava and gas shoot from vents for hours, followed by quieter periods that can last days to weeks. Since late 2024, Kīlauea’s repeated fountain-like activity has provided fresh opportunities for investigation.
Across the reporting, scientists describe using multiple observation and analysis approaches to probe what triggers, maintains, and ends these long, discrete fountain episodes. The outlets note that while lava fountaining is known from other volcanoes such as in Hawaii, Iceland, and Italy, the mechanisms behind individual episodes remain uncertain. One outlet says researchers may have moved past at least one earlier theory, suggesting new interpretations are emerging from the recent run of activity and the summit’s visible changes.
Together, the sources frame the work as a step toward better eruption forecasting by linking measurable surface signals—such as summit swelling—with the conditions that precede and shape lava fountain behavior.
