USGS reports the eruption was confined to Halemaʻumaʻu within Hawaii Volcanoes National Park. Authorities set the alert level to Advisory with the Aviation Color Code at Orange during the episode. Outlet reports differed on fountain height, with estimates ranging from about 150 meters to roughly 300 meters. The Sept. 2 event began shortly after midnight and ended abruptly around 8 p.m., as monitoring continued for vog and sulfur dioxide. Researchers suggest the vent may be widening, a change that could favor broader but lower fountains during this rare repeating sequence.