Hawaiian Volcano Update: Follow-up on Kīlauea Summit Eruption’s Episode 32 - September 11, 2025

Now 9 days after the end of episode 32, USGS-HVO scientists expect episode 33 in another 8 to 10 days based on current monitoring data. Although the volcano continues to recharge underground, the slower rate of recovery since the last lava fountains may lead to the longest pause yet between episodes – this following the third largest outpouring of lava during episode 32. Gas emissions continue at a lower rate between episodes of lava fountaining, sometimes drifting into nearby communities over the past week due to variable, storm-related winds.

As with every summit eruption in the last 5 years, vog and tephra remain the most common hazards for island residents, and the usual precautions and preparations apply, especially for those with respiratory sensitivities – more information at https://vog.ivhhn.org/. These hazards are worse at the start of each episode, and much reduced between episodes. All eruptive activity has been confined to Kīlauea’s summit caldera within Hawaiʻi Volcanoes National Park, with no increased lava threat to people. There continue to be no significant changes on either of Kīlauea’s rift zones.

Maunaloa continues to inflate its established post-eruption pattern, with localized adjustments evident on monitoring instruments in recent weeks, perhaps coincident with pressure changes at Kīlauea. As usual, we summarize the monitoring signals, imagery, and reports available courtesy of the USGS Hawaiian Volcano Observatory, annotating the presentation on screen as we go and discussing live viewer questions.

To support our productions please like, share and subscribe, and consider making a donation at https://hveri.org/donate .