Hawaiian Volcano Update: Kīlauea’s Nāpau Eruption Ends After 5 Days, September 26, 2024

After progressing through 5 days and 4 different phases, Kīlauea’s eruption at Nāpau Crater ended on September 20 after covering 156 acres within the backcountry of Hawaiʻi Volcanoes National Park. Monitoring signals have quieted as the volcano recharges following the eruption, with earthquakes and nearby ground-tilt greatly reduced while at the summit, slow inflation may be resuming. 

Gas emissions are also back to the volcanic background near 60 tonnes of SO2 per day from the summit, much less than the peak of 12,000 tonnes per day during the eruption. From the eruption site, ongoing minimal gas emissions are no longer being detected.

There has been no apparent effect of Kīlauea’s activity on neighboring Maunaloa, which continues its usual pattern.

As usual, we review 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. 

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