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USGS webcam shows the inactive summit vent on Friday afternoon

Kīlauea Volcano Update: Episode 33 Ends Abruptly
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by Big Island Video News
on Sep 19, 2025 at 5:29 pm

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STORY SUMMARY

HAWAIʻI VOLCANOES NATIONAL PARK - The north vent stopped erupting at approximately 12:08 p.m. HST, with a rapid change from deflation to inflation at the summit.

(BIVN) – Episode 33 in the ongoing eruption at the summit of Kīlauea volcano came to an abrupt end on Friday afternoon.

From the USGS Hawaiian Volcano Observatory:

The north vent stopped erupting at approximately 12:08 p.m. HST. The south vent stopped erupting at approximately 6:00 a.m. HST this morning after a few intermittent outbursts. Lava fountains reached up to 700–800 feet (210–240 meters) during the early hours of the eruption, making these the highest fountains since episode 28 in July. The north vent fountain was tilted at about 60 degrees to the east, which is less than the 30–45 degree tilts of the episode 31 and 32 fountains. After the initial stages, the fountain height remained around 300–400 feet (90–120 meters) high during most of this episode. Approximately 8.25 million cubic yards (6.3 million cubic meters) were erupted during episode 33 and lava flows covered about 2/3 of the floor of Halemaʻumaʻu crater.

Volcanic gas emissions have greatly decreased since the eruption stopped. Lava flows from this episode on the floor of Halemaʻumaʻu, within the southern part of Kaluapele (Kīlauea caldera), may continue to exhibit slow movement or incandescence as they cool and solidify over the coming days.

The Uēkahuna tiltmeter (UWD) recorded about 16.5 microradians of deflationary tilt during this episode. At the same time the lava fountaining stopped, there was a rapid change from deflation to inflation at the summit, and a decrease in seismic tremor intensity.

The USGS Volcano Alert Level for Kīlauea remains WATCH.


Filed Under: Volcano Tagged With: Kilauea

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