Overview

• Episode 34 lasted about six hours on Oct. 1, erupting from two vents in Halemaʻumaʻu before ending at 7:03 a.m. HST.
• HVO measured fountains near 100 m from the north vent and up to 400 m from the south vent, covering much of the western crater floor.
• An estimated 9 million cubic meters of lava erupted with peak effusion around 382 m³/s, nearly double earlier episodes in this sequence.
• Activity remained confined to the closed summit crater inside Hawai‘i Volcanoes National Park, with no threat to homes or commercial airports.
• Elevated sulfur dioxide near 1,200–1,500 t/day produced vog, Pele’s hair and other tephra were reported across the summit area and Highway 11, and tiltmeters showed deflation during fountaining followed by renewed inflation with alert levels at WATCH and ORANGE.